./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.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_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 1b7166d94206693c3f254a3c1de8d5825f8510fb .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:16:35,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:16:35,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:16:35,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:16:35,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:16:35,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:16:35,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:16:35,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:16:35,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:16:35,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:16:35,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:16:35,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:16:35,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:16:35,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:16:35,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:16:35,115 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:16:35,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:16:35,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:16:35,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:16:35,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:16:35,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:16:35,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:16:35,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:16:35,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:16:35,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:16:35,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:16:35,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:16:35,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:16:35,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:16:35,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:16:35,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:16:35,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:16:35,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:16:35,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:16:35,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:16:35,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:16:35,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:16:35,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:16:35,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:16:35,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:16:35,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:16:35,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 21:16:35,204 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:16:35,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:16:35,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:16:35,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:16:35,206 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:16:35,206 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 21:16:35,206 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 21:16:35,215 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 21:16:35,216 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 21:16:35,216 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 21:16:35,217 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 21:16:35,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:16:35,218 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 21:16:35,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:16:35,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:16:35,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 21:16:35,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 21:16:35,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 21:16:35,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:16:35,219 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 21:16:35,219 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:16:35,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 21:16:35,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:16:35,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:16:35,220 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 21:16:35,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:16:35,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:16:35,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:16:35,222 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 21:16:35,223 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 21:16:35,223 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_70eda526-743d-4328-ba3c-5ccc9251a344/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2020-11-29 21:16:35,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:16:35,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:16:35,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:16:35,535 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:16:35,536 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:16:35,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2020-11-29 21:16:35,610 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/data/9ec4a4afb/e5ed0a00edf440318630397bd9ed8ccb/FLAG3d8975350 [2020-11-29 21:16:36,102 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:16:36,103 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2020-11-29 21:16:36,113 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/data/9ec4a4afb/e5ed0a00edf440318630397bd9ed8ccb/FLAG3d8975350 [2020-11-29 21:16:36,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/data/9ec4a4afb/e5ed0a00edf440318630397bd9ed8ccb [2020-11-29 21:16:36,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:16:36,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:16:36,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:16:36,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:16:36,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:16:36,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c126e05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36, skipping insertion in model container [2020-11-29 21:16:36,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:16:36,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:16:36,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:16:36,669 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:16:36,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:16:36,696 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:16:36,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36 WrapperNode [2020-11-29 21:16:36,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:16:36,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:16:36,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:16:36,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:16:36,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:16:36,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:16:36,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:16:36,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:16:36,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,784 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... [2020-11-29 21:16:36,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:16:36,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:16:36,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:16:36,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:16:36,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:36,903 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-11-29 21:16:36,904 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-11-29 21:16:36,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:16:36,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:16:37,080 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:16:37,081 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-29 21:16:37,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:16:37 BoogieIcfgContainer [2020-11-29 21:16:37,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:16:37,086 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 21:16:37,087 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 21:16:37,090 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 21:16:37,091 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:16:37,091 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 09:16:36" (1/3) ... [2020-11-29 21:16:37,093 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@39ccfed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:16:37, skipping insertion in model container [2020-11-29 21:16:37,093 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:16:37,093 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:16:36" (2/3) ... [2020-11-29 21:16:37,093 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@39ccfed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:16:37, skipping insertion in model container [2020-11-29 21:16:37,094 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:16:37,094 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:16:37" (3/3) ... [2020-11-29 21:16:37,095 INFO L373 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2020-11-29 21:16:37,176 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 21:16:37,176 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 21:16:37,177 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 21:16:37,177 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:16:37,177 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:16:37,177 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 21:16:37,177 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:16:37,177 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 21:16:37,190 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-29 21:16:37,231 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:16:37,246 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:16:37,246 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:16:37,253 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 21:16:37,266 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:16:37,266 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 21:16:37,266 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-29 21:16:37,268 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:16:37,268 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:16:37,268 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:16:37,268 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 21:16:37,269 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:16:37,276 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 9#L21true call main_#t~ret3 := g(main_~x~0);< 11#gENTRYtrue [2020-11-29 21:16:37,276 INFO L796 eck$LassoCheckResult]: Loop: 11#gENTRYtrue ~x := #in~x; 3#L12true assume !(0 == ~x); 13#L15true call #t~ret0 := g(~x - 1);< 11#gENTRYtrue [2020-11-29 21:16:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash 39891, now seen corresponding path program 1 times [2020-11-29 21:16:37,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:37,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025724850] [2020-11-29 21:16:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:37,389 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:37,395 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:37,409 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:37,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash 29936, now seen corresponding path program 1 times [2020-11-29 21:16:37,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:37,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458173994] [2020-11-29 21:16:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:37,422 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:37,426 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:37,428 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:37,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1188392926, now seen corresponding path program 1 times [2020-11-29 21:16:37,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:37,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184458484] [2020-11-29 21:16:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:37,443 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:37,451 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:37,453 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:37,597 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:16:37,598 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:16:37,598 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:16:37,598 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:16:37,598 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:16:37,598 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:37,599 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:16:37,599 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:16:37,599 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2020-11-29 21:16:37,599 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:16:37,599 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:16:37,614 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:37,633 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:37,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:37,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:37,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:37,801 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:16:37,801 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:37,806 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:37,806 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:37,813 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:37,813 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:37,845 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:37,845 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:37,849 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:37,849 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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) [2020-11-29 21:16:37,899 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:37,900 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:37,907 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:37,907 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:37,946 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:37,947 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:37,951 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:37,952 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:37,977 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:37,978 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:38,005 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:16:38,005 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:38,022 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:38,022 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-6} Honda state: {g_#in~x=-6} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=-1}, {g_#in~x=0}] Lambdas: [7, 1, 0] Nus: [0, 0] [2020-11-29 21:16:38,134 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:16:38,134 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:16:38,134 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:16:38,134 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:16:38,134 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:16:38,135 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,135 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:16:38,135 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:16:38,135 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2020-11-29 21:16:38,135 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:16:38,135 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:16:38,137 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,177 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,289 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:16:38,289 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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) [2020-11-29 21:16:38,300 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:38,300 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,305 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:38,305 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:38,347 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:38,347 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:38,349 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:38,349 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,384 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:38,384 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:38,386 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:38,387 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,414 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:38,414 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:38,417 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:38,418 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:38,444 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:38,445 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:38,447 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:38,447 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret4=0} Honda state: {ULTIMATE.start_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:38,473 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:38,479 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:38,479 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,503 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:38,504 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:38,541 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:16:38,541 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:38,577 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:16:38,578 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:16:38,578 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:16:38,578 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:16:38,578 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:16:38,578 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:16:38,579 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,579 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:16:38,579 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:16:38,579 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2020-11-29 21:16:38,579 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:16:38,579 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:16:38,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,636 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,639 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:38,745 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:16:38,752 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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) [2020-11-29 21:16:38,761 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 [2020-11-29 21:16:38,763 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:38,763 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:38,764 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:38,764 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:38,764 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:38,766 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:38,766 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,770 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:38,815 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 [2020-11-29 21:16:38,817 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:38,817 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:38,817 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:38,817 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:38,817 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:38,818 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:38,819 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:16:38,826 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:38,861 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 [2020-11-29 21:16:38,863 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:38,863 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:38,863 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:38,863 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:38,863 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:38,864 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:38,864 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:16:38,866 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:38,894 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 [2020-11-29 21:16:38,896 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:38,896 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:38,896 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:38,896 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:38,896 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:38,897 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:38,897 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:16:38,899 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:16:38,951 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 [2020-11-29 21:16:38,952 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:38,953 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:38,953 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:38,953 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:38,953 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:38,954 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:38,954 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,956 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:38,993 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 [2020-11-29 21:16:38,994 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:38,995 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:38,995 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:38,995 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:38,995 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:38,995 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:38,995 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:16:38,997 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:39,026 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 [2020-11-29 21:16:39,027 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:39,027 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:39,027 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:39,027 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:39,028 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:39,028 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:39,029 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:16:39,050 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:39,074 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 [2020-11-29 21:16:39,076 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:39,076 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:39,076 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:39,076 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:39,076 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:39,077 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:39,077 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:16:39,083 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:39,108 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 [2020-11-29 21:16:39,109 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:39,109 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:39,110 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:39,110 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:39,110 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:39,111 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:39,111 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:16:39,113 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/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 [2020-11-29 21:16:39,137 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 [2020-11-29 21:16:39,139 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:39,139 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:39,140 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 21:16:39,140 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:39,156 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2020-11-29 21:16:39,156 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2020-11-29 21:16:39,175 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:16:39,260 INFO L443 ModelExtractionUtils]: Simplification made 10 calls to the SMT solver. [2020-11-29 21:16:39,260 INFO L444 ModelExtractionUtils]: 1 out of 11 variables were initially zero. Simplification set additionally 7 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:16:39,269 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:39,276 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2020-11-29 21:16:39,276 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:16:39,277 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2020-11-29 21:16:39,317 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2020-11-29 21:16:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:16:39,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:16:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:39,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 21:16:39,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:16:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:16:39,490 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 [2020-11-29 21:16:39,492 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 5 states. [2020-11-29 21:16:39,678 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 5 states. Result 35 states and 42 transitions. Complement of second has 13 states. [2020-11-29 21:16:39,679 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 [2020-11-29 21:16:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 21:16:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2020-11-29 21:16:39,683 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2020-11-29 21:16:39,684 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:16:39,684 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2020-11-29 21:16:39,684 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:16:39,684 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2020-11-29 21:16:39,684 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:16:39,685 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 42 transitions. [2020-11-29 21:16:39,695 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:16:39,707 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2020-11-29 21:16:39,709 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-29 21:16:39,709 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2020-11-29 21:16:39,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2020-11-29 21:16:39,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:16:39,713 INFO L691 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-11-29 21:16:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2020-11-29 21:16:39,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-11-29 21:16:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 21:16:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-11-29 21:16:39,746 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-11-29 21:16:39,747 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-11-29 21:16:39,747 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 21:16:39,747 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2020-11-29 21:16:39,751 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 21:16:39,751 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:16:39,751 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:16:39,752 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:16:39,753 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-29 21:16:39,753 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 121#L20 assume !(main_~x~0 < 0); 118#L21 call main_#t~ret3 := g(main_~x~0);< 119#gENTRY ~x := #in~x; 117#L12 assume !(0 == ~x); 115#L15 call #t~ret0 := g(~x - 1);< 122#gENTRY ~x := #in~x; 114#L12 assume 0 == ~x;#res := 1; 116#gFINAL assume true; 123#gEXIT >#22#return; 125#L15-1 [2020-11-29 21:16:39,753 INFO L796 eck$LassoCheckResult]: Loop: 125#L15-1 call #t~ret1 := g(1 + #t~ret0);< 126#gENTRY ~x := #in~x; 129#L12 assume !(0 == ~x); 124#L15 call #t~ret0 := g(~x - 1);< 126#gENTRY ~x := #in~x; 129#L12 assume 0 == ~x;#res := 1; 128#gFINAL assume true; 130#gEXIT >#22#return; 125#L15-1 [2020-11-29 21:16:39,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:39,754 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 1 times [2020-11-29 21:16:39,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:39,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212946859] [2020-11-29 21:16:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:39,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:39,797 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:39,799 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:39,802 INFO L82 PathProgramCache]: Analyzing trace with hash -243608724, now seen corresponding path program 1 times [2020-11-29 21:16:39,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:39,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018310959] [2020-11-29 21:16:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:39,814 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:39,823 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:39,829 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:39,830 INFO L82 PathProgramCache]: Analyzing trace with hash -791141734, now seen corresponding path program 1 times [2020-11-29 21:16:39,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:39,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313945719] [2020-11-29 21:16:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:39,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 21:16:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:39,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-11-29 21:16:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:16:40,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313945719] [2020-11-29 21:16:40,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005685517] [2020-11-29 21:16:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:16:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:40,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:16:40,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:16:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:16:40,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:16:40,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-29 21:16:40,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491836940] [2020-11-29 21:16:40,332 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:16:40,332 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:16:40,332 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:16:40,332 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:16:40,332 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:16:40,332 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:40,333 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:16:40,333 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:16:40,333 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2020-11-29 21:16:40,333 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:16:40,333 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:16:40,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:40,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:40,353 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:40,409 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:16:40,410 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:16:40,413 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:40,413 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:16:40,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:16:40,456 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:43,601 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:16:43,603 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:16:43,603 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:16:43,603 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:16:43,603 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:16:43,603 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:16:43,603 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:43,603 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:16:43,603 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:16:43,603 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2020-11-29 21:16:43,603 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:16:43,603 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:16:43,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:43,610 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:43,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:43,707 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:16:43,707 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:16:43,715 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 [2020-11-29 21:16:43,717 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:43,717 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:43,717 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:43,718 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:43,718 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:43,718 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:43,719 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:43,720 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:16:43,764 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 [2020-11-29 21:16:43,765 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:16:43,766 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:16:43,766 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:16:43,766 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:16:43,766 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:16:43,769 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:16:43,769 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:43,774 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:16:43,778 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:16:43,779 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:16:43,783 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:16:43,783 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:16:43,783 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:16:43,783 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:43,812 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:16:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:16:43,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:16:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:43,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 21:16:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:16:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:16:44,126 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-11-29 21:16:44,126 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 8 states. [2020-11-29 21:16:44,557 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 8 states. Result 82 states and 120 transitions. Complement of second has 31 states. [2020-11-29 21:16:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-11-29 21:16:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 21:16:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2020-11-29 21:16:44,560 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 8 letters. [2020-11-29 21:16:44,561 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:16:44,561 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 18 letters. Loop has 8 letters. [2020-11-29 21:16:44,562 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:16:44,562 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 16 letters. [2020-11-29 21:16:44,562 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:16:44,562 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 82 states and 120 transitions. [2020-11-29 21:16:44,572 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-29 21:16:44,581 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 82 states to 58 states and 81 transitions. [2020-11-29 21:16:44,582 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2020-11-29 21:16:44,584 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2020-11-29 21:16:44,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 81 transitions. [2020-11-29 21:16:44,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:16:44,585 INFO L691 BuchiCegarLoop]: Abstraction has 58 states and 81 transitions. [2020-11-29 21:16:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 81 transitions. [2020-11-29 21:16:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-29 21:16:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 21:16:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-11-29 21:16:44,598 INFO L714 BuchiCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-11-29 21:16:44,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:16:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 21:16:44,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-29 21:16:44,602 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 10 states. [2020-11-29 21:16:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:16:44,692 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-29 21:16:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:16:44,692 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 44 transitions. [2020-11-29 21:16:44,694 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 21:16:44,695 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 30 states and 34 transitions. [2020-11-29 21:16:44,695 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-11-29 21:16:44,695 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-11-29 21:16:44,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 34 transitions. [2020-11-29 21:16:44,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:16:44,695 INFO L691 BuchiCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-11-29 21:16:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 34 transitions. [2020-11-29 21:16:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2020-11-29 21:16:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-29 21:16:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-29 21:16:44,698 INFO L714 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-29 21:16:44,698 INFO L594 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-29 21:16:44,699 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 21:16:44,699 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 27 transitions. [2020-11-29 21:16:44,699 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 21:16:44,700 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:16:44,700 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:16:44,700 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:16:44,700 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 21:16:44,701 INFO L794 eck$LassoCheckResult]: Stem: 502#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 503#L20 assume !(main_~x~0 < 0); 495#L21 call main_#t~ret3 := g(main_~x~0);< 496#gENTRY ~x := #in~x; 500#L12 assume !(0 == ~x); 501#L15 call #t~ret0 := g(~x - 1);< 507#gENTRY ~x := #in~x; 508#L12 assume 0 == ~x;#res := 1; 509#gFINAL assume true; 510#gEXIT >#22#return; 505#L15-1 call #t~ret1 := g(1 + #t~ret0);< 504#gENTRY ~x := #in~x; 506#L12 assume !(0 == ~x); 514#L15 call #t~ret0 := g(~x - 1);< 518#gENTRY ~x := #in~x; 517#L12 assume !(0 == ~x); 513#L15 [2020-11-29 21:16:44,701 INFO L796 eck$LassoCheckResult]: Loop: 513#L15 call #t~ret0 := g(~x - 1);< 511#gENTRY ~x := #in~x; 515#L12 assume !(0 == ~x); 513#L15 [2020-11-29 21:16:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash 2001409165, now seen corresponding path program 2 times [2020-11-29 21:16:44,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:44,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937651234] [2020-11-29 21:16:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:44,710 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:44,718 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:44,720 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash 49976, now seen corresponding path program 2 times [2020-11-29 21:16:44,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:44,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200630973] [2020-11-29 21:16:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:44,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:44,728 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:44,729 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1244451628, now seen corresponding path program 3 times [2020-11-29 21:16:44,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:44,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31911722] [2020-11-29 21:16:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:44,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 21:16:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:16:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 21:16:44,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31911722] [2020-11-29 21:16:44,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415864224] [2020-11-29 21:16:44,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:16:44,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 21:16:44,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:16:44,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 21:16:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:16:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 21:16:44,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:16:44,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 21:16:44,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411758451] [2020-11-29 21:16:44,987 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:16:44,987 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:16:44,987 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:16:44,987 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:16:44,987 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:16:44,987 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:44,987 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:16:44,987 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:16:44,987 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2020-11-29 21:16:44,987 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:16:44,987 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:16:44,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:44,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:45,001 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:45,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:16:45,070 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:16:45,070 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:45,075 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:45,076 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:45,122 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:16:45,122 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:45,270 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:45,271 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-8, g_~x=-8} Honda state: {g_#in~x=-8, g_~x=-8} Generalized eigenvectors: [{g_#in~x=-1, g_~x=-1}, {g_#in~x=0, g_~x=0}, {g_#in~x=0, g_~x=0}] Lambdas: [1, 14, 10] Nus: [1, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:45,295 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:45,295 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:45,299 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:45,299 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:45,321 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:45,321 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:45,323 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:45,323 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:16:45,344 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:16:45,344 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:16:45,346 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:16:45,346 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2020-11-29 21:16:45,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:16:45,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 21:16:45,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-29 21:16:45,367 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. cyclomatic complexity: 4 Second operand 10 states. [2020-11-29 21:16:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:16:45,550 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-29 21:16:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 21:16:45,550 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 28 transitions. [2020-11-29 21:16:45,551 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 21:16:45,552 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 28 transitions. [2020-11-29 21:16:45,552 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2020-11-29 21:16:45,552 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2020-11-29 21:16:45,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 28 transitions. [2020-11-29 21:16:45,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:16:45,553 INFO L691 BuchiCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-29 21:16:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 28 transitions. [2020-11-29 21:16:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-11-29 21:16:45,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 21:16:45,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-29 21:16:45,556 INFO L714 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-29 21:16:45,556 INFO L594 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-29 21:16:45,556 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 21:16:45,556 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2020-11-29 21:16:45,557 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 21:16:45,557 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:16:45,557 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:16:45,558 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:16:45,558 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2020-11-29 21:16:45,558 INFO L794 eck$LassoCheckResult]: Stem: 639#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 640#L20 assume !(main_~x~0 < 0); 632#L21 call main_#t~ret3 := g(main_~x~0);< 633#gENTRY ~x := #in~x; 637#L12 assume !(0 == ~x); 638#L15 call #t~ret0 := g(~x - 1);< 642#gENTRY ~x := #in~x; 643#L12 assume 0 == ~x;#res := 1; 650#gFINAL assume true; 648#gEXIT >#22#return; 635#L15-1 [2020-11-29 21:16:45,558 INFO L796 eck$LassoCheckResult]: Loop: 635#L15-1 call #t~ret1 := g(1 + #t~ret0);< 641#gENTRY ~x := #in~x; 634#L12 assume !(0 == ~x); 636#L15 call #t~ret0 := g(~x - 1);< 647#gENTRY ~x := #in~x; 651#L12 assume !(0 == ~x); 645#L15 call #t~ret0 := g(~x - 1);< 649#gENTRY ~x := #in~x; 652#L12 assume 0 == ~x;#res := 1; 644#gFINAL assume true; 646#gEXIT >#22#return; 635#L15-1 [2020-11-29 21:16:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:45,559 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 2 times [2020-11-29 21:16:45,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:45,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782329901] [2020-11-29 21:16:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:45,565 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:45,570 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:45,572 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1187216231, now seen corresponding path program 2 times [2020-11-29 21:16:45,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:45,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030626153] [2020-11-29 21:16:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:45,579 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:45,583 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:45,585 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:16:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1917105529, now seen corresponding path program 4 times [2020-11-29 21:16:45,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:16:45,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144266478] [2020-11-29 21:16:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:16:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:45,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:16:45,603 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:16:45,605 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:16:45,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 09:16:45 BoogieIcfgContainer [2020-11-29 21:16:45,938 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 21:16:45,938 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:16:45,938 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:16:45,939 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:16:45,939 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:16:37" (3/4) ... [2020-11-29 21:16:45,941 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 21:16:45,981 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_70eda526-743d-4328-ba3c-5ccc9251a344/bin/uautomizer/witness.graphml [2020-11-29 21:16:45,981 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:16:45,983 INFO L168 Benchmark]: Toolchain (without parser) took 9487.26 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 71.2 MB in the beginning and 60.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:16:45,983 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 77.6 MB. Free memory is still 39.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:16:45,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.61 ms. Allocated memory is still 100.7 MB. Free memory was 70.9 MB in the beginning and 80.4 MB in the end (delta: -9.4 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-11-29 21:16:45,984 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.69 ms. Allocated memory is still 100.7 MB. Free memory was 80.4 MB in the beginning and 79.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:16:45,985 INFO L168 Benchmark]: Boogie Preprocessor took 30.97 ms. Allocated memory is still 100.7 MB. Free memory was 79.2 MB in the beginning and 78.4 MB in the end (delta: 779.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:16:45,985 INFO L168 Benchmark]: RCFGBuilder took 294.66 ms. Allocated memory is still 100.7 MB. Free memory was 78.4 MB in the beginning and 70.1 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:16:45,986 INFO L168 Benchmark]: BuchiAutomizer took 8851.41 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 69.8 MB in the beginning and 61.6 MB in the end (delta: 8.2 MB). Peak memory consumption was 65.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:16:45,986 INFO L168 Benchmark]: Witness Printer took 42.74 ms. Allocated memory is still 123.7 MB. Free memory was 61.6 MB in the beginning and 60.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:16:45,989 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 77.6 MB. Free memory is still 39.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 200.61 ms. Allocated memory is still 100.7 MB. Free memory was 70.9 MB in the beginning and 80.4 MB in the end (delta: -9.4 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.69 ms. Allocated memory is still 100.7 MB. Free memory was 80.4 MB in the beginning and 79.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.97 ms. Allocated memory is still 100.7 MB. Free memory was 79.2 MB in the beginning and 78.4 MB in the end (delta: 779.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 294.66 ms. Allocated memory is still 100.7 MB. Free memory was 78.4 MB in the beginning and 70.1 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 8851.41 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 69.8 MB in the beginning and 61.6 MB in the end (delta: 8.2 MB). Peak memory consumption was 65.6 MB. Max. memory is 16.1 GB. * Witness Printer took 42.74 ms. Allocated memory is still 123.7 MB. Free memory was 61.6 MB in the beginning and 60.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. 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 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function -2 * aux-g(x - 1)-aux + 1 and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. The remainder module has 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.7s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 7.1s. Construction of modules took 0.2s. Büchi inclusion checks took 1.1s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 46 SDtfs, 70 SDslu, 99 SDs, 0 SdLazy, 234 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax100 hnf93 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq194 hnf92 smp100 dnf139 smp100 tf104 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 140ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.6s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@36c1a2a4=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4260011f=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7b0a90db=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4201f5e6=0, x=0, x=1, NULL=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 15]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) [L21] CALL g(x) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...