./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y --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 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:24:30,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:24:30,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:24:30,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:24:30,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:24:30,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:24:30,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:24:30,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:24:30,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:24:30,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:24:30,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:24:30,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:24:30,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:24:30,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:24:30,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:24:30,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:24:30,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:24:30,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:24:30,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:24:30,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:24:30,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:24:30,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:24:30,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:24:30,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:24:30,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:24:30,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:24:30,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:24:30,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:24:30,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:24:30,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:24:30,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:24:30,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:24:30,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:24:30,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:24:30,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:24:30,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:24:30,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:24:30,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:24:30,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:24:30,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:24:30,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:24:30,564 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-13 18:24:30,604 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:24:30,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:24:30,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:24:30,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:24:30,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:24:30,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:24:30,617 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:24:30,618 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-13 18:24:30,618 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-13 18:24:30,618 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-13 18:24:30,619 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-13 18:24:30,620 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-13 18:24:30,620 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-13 18:24:30,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:24:30,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:24:30,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:24:30,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:24:30,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-13 18:24:30,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-13 18:24:30,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-13 18:24:30,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:24:30,622 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-13 18:24:30,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:24:30,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-13 18:24:30,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:24:30,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:24:30,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:24:30,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:24:30,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:24:30,626 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-13 18:24:30,626 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_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2021-11-13 18:24:30,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:24:30,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:24:30,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:24:30,961 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:24:30,961 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:24:30,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-11-13 18:24:31,065 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/data/fe4ab6dec/394f66a5b1f7489b9f47cc302ef09890/FLAG791016666 [2021-11-13 18:24:31,506 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:24:31,506 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-11-13 18:24:31,512 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/data/fe4ab6dec/394f66a5b1f7489b9f47cc302ef09890/FLAG791016666 [2021-11-13 18:24:31,877 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/data/fe4ab6dec/394f66a5b1f7489b9f47cc302ef09890 [2021-11-13 18:24:31,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:24:31,881 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:24:31,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:24:31,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:24:31,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:24:31,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:24:31" (1/1) ... [2021-11-13 18:24:31,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175d4b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:31, skipping insertion in model container [2021-11-13 18:24:31,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:24:31" (1/1) ... [2021-11-13 18:24:31,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:24:31,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:24:32,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:24:32,058 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:24:32,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:24:32,113 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:24:32,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32 WrapperNode [2021-11-13 18:24:32,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:24:32,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:24:32,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:24:32,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:24:32,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,127 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:24:32,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:24:32,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:24:32,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:24:32,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:24:32,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:24:32,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:24:32,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:24:32,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (1/1) ... [2021-11-13 18:24:32,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:32,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:32,188 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:32,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-13 18:24:32,250 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-11-13 18:24:32,250 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-11-13 18:24:32,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:24:32,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:24:32,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:24:32,401 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:24:32,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:24:32 BoogieIcfgContainer [2021-11-13 18:24:32,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:24:32,404 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-13 18:24:32,404 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-13 18:24:32,407 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-13 18:24:32,408 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-13 18:24:32,408 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.11 06:24:31" (1/3) ... [2021-11-13 18:24:32,409 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@47dbe4fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.11 06:24:32, skipping insertion in model container [2021-11-13 18:24:32,410 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-13 18:24:32,410 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:32" (2/3) ... [2021-11-13 18:24:32,410 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@47dbe4fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.11 06:24:32, skipping insertion in model container [2021-11-13 18:24:32,410 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-13 18:24:32,410 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:24:32" (3/3) ... [2021-11-13 18:24:32,411 INFO L388 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2021-11-13 18:24:32,455 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-13 18:24:32,456 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-13 18:24:32,456 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-13 18:24:32,456 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-13 18:24:32,456 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-13 18:24:32,456 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-13 18:24:32,456 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-13 18:24:32,457 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-13 18:24:32,470 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:24:32,492 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-13 18:24:32,497 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-13 18:24:32,497 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-13 18:24:32,504 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-11-13 18:24:32,504 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-13 18:24:32,504 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-13 18:24:32,505 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:24:32,508 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-13 18:24:32,508 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-13 18:24:32,508 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-13 18:24:32,509 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-11-13 18:24:32,509 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-13 18:24:32,516 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 13#L20true assume !(main_~x~0#1 < 0); 12#L21true call main_#t~ret3#1 := g(main_~x~0#1);< 8#gENTRYtrue [2021-11-13 18:24:32,516 INFO L793 eck$LassoCheckResult]: Loop: 8#gENTRYtrue ~x := #in~x; 9#L12true assume !(0 == ~x); 6#L15true call #t~ret0 := g(~x - 1);< 8#gENTRYtrue [2021-11-13 18:24:32,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:32,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1202733, now seen corresponding path program 1 times [2021-11-13 18:24:32,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:32,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072457521] [2021-11-13 18:24:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:32,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:32,606 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:32,624 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash 29937, now seen corresponding path program 1 times [2021-11-13 18:24:32,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:32,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885149951] [2021-11-13 18:24:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:32,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:32,653 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:32,674 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880581, now seen corresponding path program 1 times [2021-11-13 18:24:32,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:32,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134246337] [2021-11-13 18:24:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:32,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:32,704 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:32,715 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:32,850 INFO L210 LassoAnalysis]: Preferences: [2021-11-13 18:24:32,851 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-13 18:24:32,851 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-13 18:24:32,851 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-13 18:24:32,851 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-13 18:24:32,851 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:32,852 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-13 18:24:32,852 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-13 18:24:32,852 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2021-11-13 18:24:32,852 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-13 18:24:32,853 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-13 18:24:32,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:32,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:32,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:32,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:32,883 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:32,940 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-13 18:24:32,940 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-13 18:24:32,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:32,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:32,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:32,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:32,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:32,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-13 18:24:32,965 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:32,965 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:32,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:32,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:32,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,009 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,009 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-13 18:24:33,019 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,019 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:33,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-13 18:24:33,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,060 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,082 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,082 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:33,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,117 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,129 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-13 18:24:33,156 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,157 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:33,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-13 18:24:33,201 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,201 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-11-13 18:24:33,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-13 18:24:33,255 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-13 18:24:33,255 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,306 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,306 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-4} Honda state: {g_#in~x=-4} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=0}, {g_#in~x=-1}] Lambdas: [0, 5, 1] Nus: [0, 0] [2021-11-13 18:24:33,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-11-13 18:24:33,383 INFO L210 LassoAnalysis]: Preferences: [2021-11-13 18:24:33,383 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-13 18:24:33,383 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-13 18:24:33,383 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-13 18:24:33,383 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-13 18:24:33,384 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,384 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-13 18:24:33,384 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-13 18:24:33,384 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2021-11-13 18:24:33,384 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-13 18:24:33,384 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-13 18:24:33,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,484 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-13 18:24:33,484 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-13 18:24:33,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,485 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,491 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,491 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,513 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,513 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:33,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-13 18:24:33,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-11-13 18:24:33,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-13 18:24:33,544 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,544 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,561 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,561 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:33,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-13 18:24:33,586 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,586 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,609 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,609 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:33,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-13 18:24:33,649 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,650 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,662 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,662 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0#1=0} Honda state: {ULTIMATE.start_main_~x~0#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:33,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,684 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-13 18:24:33,688 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,688 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,702 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,702 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res#1=0} Honda state: {ULTIMATE.start_main_#res#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:33,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,723 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-13 18:24:33,725 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,725 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,734 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:33,734 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret3#1=0} Honda state: {ULTIMATE.start_main_#t~ret3#1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:33,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,761 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-13 18:24:33,762 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:33,762 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,800 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-13 18:24:33,804 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-13 18:24:33,804 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:33,845 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-13 18:24:33,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:33,849 INFO L210 LassoAnalysis]: Preferences: [2021-11-13 18:24:33,849 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-13 18:24:33,849 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-13 18:24:33,849 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-13 18:24:33,849 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-13 18:24:33,849 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,849 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-13 18:24:33,849 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-13 18:24:33,849 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2021-11-13 18:24:33,849 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-13 18:24:33,849 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-13 18:24:33,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,861 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,863 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:33,933 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-13 18:24:33,941 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-13 18:24:33,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:33,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:33,957 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:33,966 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:33,976 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:33,976 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-13 18:24:33,977 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:33,977 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-13 18:24:33,977 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:33,981 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-13 18:24:33,982 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-13 18:24:33,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-11-13 18:24:33,988 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-13 18:24:34,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:34,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:34,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:34,013 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:34,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-11-13 18:24:34,015 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:34,022 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:34,022 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-13 18:24:34,022 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:34,022 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-13 18:24:34,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:34,023 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-13 18:24:34,023 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-13 18:24:34,037 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-13 18:24:34,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:34,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:34,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:34,079 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:34,089 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:34,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-11-13 18:24:34,098 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:34,098 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-13 18:24:34,098 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:34,098 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-13 18:24:34,099 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:34,099 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-13 18:24:34,099 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-13 18:24:34,112 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-13 18:24:34,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:34,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:34,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:34,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-11-13 18:24:34,138 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:34,145 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:34,145 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-13 18:24:34,145 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:34,146 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-13 18:24:34,146 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:34,146 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-13 18:24:34,146 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-13 18:24:34,148 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-13 18:24:34,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:34,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:34,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:34,168 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:34,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-11-13 18:24:34,171 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:34,178 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:34,178 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-13 18:24:34,178 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:34,178 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-13 18:24:34,178 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:34,179 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-13 18:24:34,179 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-13 18:24:34,181 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-13 18:24:34,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:34,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:34,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:34,204 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:34,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-11-13 18:24:34,206 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:34,213 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:34,213 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-13 18:24:34,213 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:34,213 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-13 18:24:34,213 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:34,214 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-13 18:24:34,214 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-13 18:24:34,216 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-13 18:24:34,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:34,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:34,237 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:34,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-11-13 18:24:34,239 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:34,246 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:34,246 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-13 18:24:34,246 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:34,246 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-13 18:24:34,246 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:34,247 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-13 18:24:34,247 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-13 18:24:34,249 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-13 18:24:34,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:34,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:34,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:34,269 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:34,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-11-13 18:24:34,271 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:34,279 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:34,279 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-13 18:24:34,279 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:34,279 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-13 18:24:34,279 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:34,280 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-13 18:24:34,280 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-13 18:24:34,281 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-13 18:24:34,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-11-13 18:24:34,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:34,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:34,304 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:34,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-11-13 18:24:34,305 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:34,312 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:34,312 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:34,312 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-11-13 18:24:34,312 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:34,327 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2021-11-13 18:24:34,327 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-11-13 18:24:34,361 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-13 18:24:34,390 INFO L443 ModelExtractionUtils]: Simplification made 11 calls to the SMT solver. [2021-11-13 18:24:34,390 INFO L444 ModelExtractionUtils]: 1 out of 11 variables were initially zero. Simplification set additionally 7 variables to zero. [2021-11-13 18:24:34,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:34,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:34,405 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:34,421 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-13 18:24:34,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-11-13 18:24:34,445 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2021-11-13 18:24:34,445 INFO L513 LassoAnalysis]: Proved termination. [2021-11-13 18:24:34,446 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2021-11-13 18:24:34,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:34,486 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2021-11-13 18:24:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:24:34,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:34,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:24:34,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:34,718 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 [2021-11-13 18:24:34,720 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:34,899 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 36 states and 43 transitions. Complement of second has 13 states. [2021-11-13 18:24:34,905 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 [2021-11-13 18:24:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:24:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-11-13 18:24:34,912 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2021-11-13 18:24:34,913 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-13 18:24:34,913 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2021-11-13 18:24:34,913 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-13 18:24:34,913 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2021-11-13 18:24:34,913 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-13 18:24:34,914 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 43 transitions. [2021-11-13 18:24:34,918 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-13 18:24:34,924 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 20 states and 26 transitions. [2021-11-13 18:24:34,925 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2021-11-13 18:24:34,925 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-11-13 18:24:34,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2021-11-13 18:24:34,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-13 18:24:34,927 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-11-13 18:24:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2021-11-13 18:24:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-13 18:24:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-13 18:24:34,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-13 18:24:34,957 INFO L704 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-13 18:24:34,957 INFO L587 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-13 18:24:34,957 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-13 18:24:34,958 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 22 transitions. [2021-11-13 18:24:34,959 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-13 18:24:34,959 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-13 18:24:34,959 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-13 18:24:34,960 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:34,960 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:34,960 INFO L791 eck$LassoCheckResult]: Stem: 119#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 120#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 130#L20 assume !(main_~x~0#1 < 0); 127#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 129#gENTRY ~x := #in~x; 131#L12 assume !(0 == ~x); 122#L15 call #t~ret0 := g(~x - 1);< 128#gENTRY ~x := #in~x; 132#L12 assume 0 == ~x;#res := 1; 121#gFINAL assume true; 123#gEXIT >#23#return; 125#L15-1 [2021-11-13 18:24:34,960 INFO L793 eck$LassoCheckResult]: Loop: 125#L15-1 call #t~ret1 := g(1 + #t~ret0);< 126#gENTRY ~x := #in~x; 136#L12 assume !(0 == ~x); 124#L15 call #t~ret0 := g(~x - 1);< 126#gENTRY ~x := #in~x; 136#L12 assume 0 == ~x;#res := 1; 134#gFINAL assume true; 135#gEXIT >#23#return; 125#L15-1 [2021-11-13 18:24:34,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:34,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 1 times [2021-11-13 18:24:34,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:34,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259932020] [2021-11-13 18:24:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:34,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:34,969 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:34,983 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1500125133, now seen corresponding path program 1 times [2021-11-13 18:24:34,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:34,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971565629] [2021-11-13 18:24:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:34,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:35,000 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:35,013 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:35,014 INFO L85 PathProgramCache]: Analyzing trace with hash 122773219, now seen corresponding path program 1 times [2021-11-13 18:24:35,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:35,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371167045] [2021-11-13 18:24:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:35,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:35,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:24:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:35,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:24:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:24:35,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:35,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371167045] [2021-11-13 18:24:35,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371167045] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:35,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776244884] [2021-11-13 18:24:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:35,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:35,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:35,144 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:35,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 18:24:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:24:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:24:35,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:24:35,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776244884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:35,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:35,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2021-11-13 18:24:35,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505437855] [2021-11-13 18:24:35,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:35,553 INFO L210 LassoAnalysis]: Preferences: [2021-11-13 18:24:35,554 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-13 18:24:35,554 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-13 18:24:35,554 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-13 18:24:35,554 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-13 18:24:35,554 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:35,554 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-13 18:24:35,554 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-13 18:24:35,554 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2021-11-13 18:24:35,555 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-13 18:24:35,555 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-13 18:24:35,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:35,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:35,569 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:35,604 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-13 18:24:35,604 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-13 18:24:35,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:35,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:35,638 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:35,641 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:35,641 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:35,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-11-13 18:24:35,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:35,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:35,693 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:35,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-11-13 18:24:35,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-13 18:24:35,720 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:35,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:37,598 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-13 18:24:37,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:37,602 INFO L210 LassoAnalysis]: Preferences: [2021-11-13 18:24:37,602 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-13 18:24:37,602 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-13 18:24:37,602 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-13 18:24:37,602 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-13 18:24:37,602 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:37,602 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-13 18:24:37,602 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-13 18:24:37,602 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2021-11-13 18:24:37,602 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-13 18:24:37,602 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-13 18:24:37,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:37,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:37,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:37,655 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-13 18:24:37,655 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-13 18:24:37,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:37,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:37,657 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:37,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-11-13 18:24:37,685 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-13 18:24:37,694 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-13 18:24:37,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-13 18:24:37,695 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-13 18:24:37,695 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-13 18:24:37,695 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-13 18:24:37,698 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-13 18:24:37,699 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-13 18:24:37,716 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-13 18:24:37,721 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-13 18:24:37,721 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-13 18:24:37,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:37,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:37,722 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:37,724 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-13 18:24:37,724 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-13 18:24:37,724 INFO L513 LassoAnalysis]: Proved termination. [2021-11-13 18:24:37,725 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2021-11-13 18:24:37,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-11-13 18:24:37,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:37,758 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-13 18:24:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:37,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:24:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:37,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:24:37,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:38,086 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 [2021-11-13 18:24:38,086 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6 Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:38,359 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 83 states and 121 transitions. Complement of second has 31 states. [2021-11-13 18:24:38,360 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 [2021-11-13 18:24:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2021-11-13 18:24:38,363 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 8 letters. [2021-11-13 18:24:38,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-13 18:24:38,364 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 19 letters. Loop has 8 letters. [2021-11-13 18:24:38,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-13 18:24:38,364 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 16 letters. [2021-11-13 18:24:38,365 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-13 18:24:38,365 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 83 states and 121 transitions. [2021-11-13 18:24:38,371 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-11-13 18:24:38,376 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 83 states to 59 states and 82 transitions. [2021-11-13 18:24:38,376 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-11-13 18:24:38,377 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2021-11-13 18:24:38,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 82 transitions. [2021-11-13 18:24:38,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-13 18:24:38,377 INFO L681 BuchiCegarLoop]: Abstraction has 59 states and 82 transitions. [2021-11-13 18:24:38,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 82 transitions. [2021-11-13 18:24:38,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-11-13 18:24:38,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 15 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (18), 11 states have call predecessors, (18), 13 states have call successors, (18) [2021-11-13 18:24:38,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2021-11-13 18:24:38,388 INFO L704 BuchiCegarLoop]: Abstraction has 53 states and 72 transitions. [2021-11-13 18:24:38,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:38,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:24:38,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:24:38,393 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:24:38,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:38,458 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-13 18:24:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:24:38,459 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 45 transitions. [2021-11-13 18:24:38,461 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-13 18:24:38,462 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 31 states and 35 transitions. [2021-11-13 18:24:38,462 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2021-11-13 18:24:38,463 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2021-11-13 18:24:38,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 35 transitions. [2021-11-13 18:24:38,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-13 18:24:38,463 INFO L681 BuchiCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-13 18:24:38,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 35 transitions. [2021-11-13 18:24:38,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-13 18:24:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:38,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-13 18:24:38,467 INFO L704 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-13 18:24:38,467 INFO L587 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-13 18:24:38,467 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-13 18:24:38,467 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2021-11-13 18:24:38,468 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-13 18:24:38,468 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-13 18:24:38,468 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-13 18:24:38,469 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:38,469 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-13 18:24:38,469 INFO L791 eck$LassoCheckResult]: Stem: 565#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 566#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 576#L20 assume !(main_~x~0#1 < 0); 574#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 575#gENTRY ~x := #in~x; 578#L12 assume !(0 == ~x); 568#L15 call #t~ret0 := g(~x - 1);< 573#gENTRY ~x := #in~x; 579#L12 assume 0 == ~x;#res := 1; 567#gFINAL assume true; 569#gEXIT >#23#return; 571#L15-1 call #t~ret1 := g(1 + #t~ret0);< 581#gENTRY ~x := #in~x; 588#L12 assume !(0 == ~x); 570#L15 call #t~ret0 := g(~x - 1);< 572#gENTRY ~x := #in~x; 577#L12 assume !(0 == ~x); 580#L15 [2021-11-13 18:24:38,470 INFO L793 eck$LassoCheckResult]: Loop: 580#L15 call #t~ret0 := g(~x - 1);< 582#gENTRY ~x := #in~x; 584#L12 assume !(0 == ~x); 580#L15 [2021-11-13 18:24:38,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:38,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1443446059, now seen corresponding path program 2 times [2021-11-13 18:24:38,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:38,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111587711] [2021-11-13 18:24:38,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:38,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:38,479 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:38,488 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash 50937, now seen corresponding path program 2 times [2021-11-13 18:24:38,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:38,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769165187] [2021-11-13 18:24:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:38,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:38,492 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:38,495 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash -488954971, now seen corresponding path program 3 times [2021-11-13 18:24:38,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:38,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896106724] [2021-11-13 18:24:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:38,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:38,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:24:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:24:38,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:38,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896106724] [2021-11-13 18:24:38,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896106724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:38,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084071606] [2021-11-13 18:24:38,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:24:38,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:38,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:38,661 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:38,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-13 18:24:38,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 18:24:38,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:24:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:24:38,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:24:38,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:24:38,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084071606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:38,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:38,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-11-13 18:24:38,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415495070] [2021-11-13 18:24:38,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:38,943 INFO L210 LassoAnalysis]: Preferences: [2021-11-13 18:24:38,943 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-13 18:24:38,943 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-13 18:24:38,943 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-13 18:24:38,943 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-13 18:24:38,943 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:38,943 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-13 18:24:38,944 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-13 18:24:38,944 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2021-11-13 18:24:38,944 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-13 18:24:38,944 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-13 18:24:38,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:38,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:38,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:38,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-13 18:24:39,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:39,048 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-13 18:24:39,048 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-13 18:24:39,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:39,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:39,049 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:39,053 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:39,053 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:39,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-11-13 18:24:39,077 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:39,077 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:39,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:39,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:39,114 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:39,115 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:39,116 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:39,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-11-13 18:24:39,140 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:39,140 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:39,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:39,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:39,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:39,179 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:39,185 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:39,185 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:39,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-11-13 18:24:39,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:39,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:39,226 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:39,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-11-13 18:24:39,227 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-13 18:24:39,227 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:39,977 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:39,977 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-5, g_~x=-7} Honda state: {g_#in~x=-5, g_~x=-7} Generalized eigenvectors: [{g_#in~x=-4, g_~x=-1}, {g_#in~x=3, g_~x=0}, {g_#in~x=-2, g_~x=0}] Lambdas: [1, 0, 0] Nus: [1, 0] [2021-11-13 18:24:40,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-11-13 18:24:40,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-13 18:24:40,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:40,005 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:40,007 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-13 18:24:40,007 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-13 18:24:40,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-11-13 18:24:40,015 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-13 18:24:40,015 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-13 18:24:40,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:40,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:40,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:24:40,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:24:40,038 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. cyclomatic complexity: 4 Second operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:40,179 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-13 18:24:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:24:40,180 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 29 transitions. [2021-11-13 18:24:40,181 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-13 18:24:40,182 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 28 states and 29 transitions. [2021-11-13 18:24:40,182 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-11-13 18:24:40,182 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2021-11-13 18:24:40,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 29 transitions. [2021-11-13 18:24:40,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-13 18:24:40,183 INFO L681 BuchiCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-13 18:24:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 29 transitions. [2021-11-13 18:24:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-11-13 18:24:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-13 18:24:40,185 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-13 18:24:40,185 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-13 18:24:40,185 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-13 18:24:40,185 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 23 transitions. [2021-11-13 18:24:40,186 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-13 18:24:40,186 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-13 18:24:40,186 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-13 18:24:40,186 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:40,186 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2021-11-13 18:24:40,187 INFO L791 eck$LassoCheckResult]: Stem: 764#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 765#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 777#L20 assume !(main_~x~0#1 < 0); 773#L21 call main_#t~ret3#1 := g(main_~x~0#1);< 776#gENTRY ~x := #in~x; 780#L12 assume !(0 == ~x); 772#L15 call #t~ret0 := g(~x - 1);< 774#gENTRY ~x := #in~x; 781#L12 assume 0 == ~x;#res := 1; 782#gFINAL assume true; 775#gEXIT >#23#return; 770#L15-1 [2021-11-13 18:24:40,187 INFO L793 eck$LassoCheckResult]: Loop: 770#L15-1 call #t~ret1 := g(1 + #t~ret0);< 778#gENTRY ~x := #in~x; 779#L12 assume !(0 == ~x); 769#L15 call #t~ret0 := g(~x - 1);< 771#gENTRY ~x := #in~x; 784#L12 assume !(0 == ~x); 767#L15 call #t~ret0 := g(~x - 1);< 783#gENTRY ~x := #in~x; 785#L12 assume 0 == ~x;#res := 1; 766#gFINAL assume true; 768#gEXIT >#23#return; 770#L15-1 [2021-11-13 18:24:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:40,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 2 times [2021-11-13 18:24:40,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:40,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917702257] [2021-11-13 18:24:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:40,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:40,198 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:40,209 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1133998729, now seen corresponding path program 2 times [2021-11-13 18:24:40,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:40,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805040967] [2021-11-13 18:24:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:40,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:40,233 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:40,242 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:40,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:40,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1734292557, now seen corresponding path program 4 times [2021-11-13 18:24:40,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:40,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116821664] [2021-11-13 18:24:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:40,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:40,253 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:40,261 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:40,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.11 06:24:40 BoogieIcfgContainer [2021-11-13 18:24:40,546 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-13 18:24:40,547 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:24:40,547 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:24:40,547 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:24:40,548 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:24:32" (3/4) ... [2021-11-13 18:24:40,550 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-11-13 18:24:40,580 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 18:24:40,580 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:24:40,581 INFO L158 Benchmark]: Toolchain (without parser) took 8699.58ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 71.6MB in the beginning and 81.4MB in the end (delta: -9.8MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2021-11-13 18:24:40,581 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:24:40,582 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.11ms. Allocated memory is still 113.2MB. Free memory was 71.4MB in the beginning and 89.3MB in the end (delta: -17.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:24:40,582 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.35ms. Allocated memory is still 113.2MB. Free memory was 89.3MB in the beginning and 87.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:24:40,582 INFO L158 Benchmark]: Boogie Preprocessor took 14.54ms. Allocated memory is still 113.2MB. Free memory was 87.9MB in the beginning and 87.2MB in the end (delta: 715.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:24:40,583 INFO L158 Benchmark]: RCFGBuilder took 244.57ms. Allocated memory is still 113.2MB. Free memory was 86.9MB in the beginning and 78.9MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:24:40,583 INFO L158 Benchmark]: BuchiAutomizer took 8142.48ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 78.5MB in the beginning and 83.4MB in the end (delta: -4.8MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. [2021-11-13 18:24:40,584 INFO L158 Benchmark]: Witness Printer took 33.23ms. Allocated memory is still 146.8MB. Free memory was 83.4MB in the beginning and 81.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:24:40,586 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 87.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 231.11ms. Allocated memory is still 113.2MB. Free memory was 71.4MB in the beginning and 89.3MB in the end (delta: -17.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.35ms. Allocated memory is still 113.2MB. Free memory was 89.3MB in the beginning and 87.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 14.54ms. Allocated memory is still 113.2MB. Free memory was 87.9MB in the beginning and 87.2MB in the end (delta: 715.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 244.57ms. Allocated memory is still 113.2MB. Free memory was 86.9MB in the beginning and 78.9MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 8142.48ms. Allocated memory was 113.2MB in the beginning and 146.8MB in the end (delta: 33.6MB). Free memory was 78.5MB in the beginning and 83.4MB in the end (delta: -4.8MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. * Witness Printer took 33.23ms. Allocated memory is still 146.8MB. Free memory was 83.4MB in the beginning and 81.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 11 locations. The remainder module has 22 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.0s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 6.6s. Construction of modules took 0.2s. Büchi inclusion checks took 1.0s. 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 26 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 69 SdHoareTripleChecker+Valid, 259.40ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 67 mSDsluCounter, 168 SdHoareTripleChecker+Invalid, 216.16ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 118 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 241 IncrementalHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 50 mSDtfsCounter, 241 mSolverCounterSat, 8.42ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq194 hnf92 smp100 dnf139 smp100 tf104 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 142ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.3s - 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@6ffce8d3=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@208e7726=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4d425c4f=0, \result=0, NULL=0, \old(x)=1, \result=0, x=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@36022ffe=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! [2021-11-13 18:24:40,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:40,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:41,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c38e105-f807-4a9f-b50f-02cb0b0797c0/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)