./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 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G --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-7e70bad [2021-11-23 12:43:16,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:43:16,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:43:16,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:43:16,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:43:16,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:43:16,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:43:16,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:43:16,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:43:16,953 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:43:16,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:43:16,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:43:16,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:43:16,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:43:16,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:43:16,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:43:16,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:43:16,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:43:16,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:43:16,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:43:16,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:43:16,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:43:16,990 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:43:16,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:43:17,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:43:17,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:43:17,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:43:17,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:43:17,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:43:17,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:43:17,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:43:17,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:43:17,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:43:17,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:43:17,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:43:17,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:43:17,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:43:17,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:43:17,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:43:17,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:43:17,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:43:17,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-23 12:43:17,068 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:43:17,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:43:17,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:43:17,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:43:17,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:43:17,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:43:17,071 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:43:17,072 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-23 12:43:17,072 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-23 12:43:17,072 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-23 12:43:17,073 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-23 12:43:17,074 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-23 12:43:17,074 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-23 12:43:17,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:43:17,074 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 12:43:17,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:43:17,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:43:17,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-23 12:43:17,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-23 12:43:17,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-23 12:43:17,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:43:17,076 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-23 12:43:17,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:43:17,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-23 12:43:17,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:43:17,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:43:17,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:43:17,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:43:17,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:43:17,086 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-23 12:43:17,086 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_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2021-11-23 12:43:17,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:43:17,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:43:17,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:43:17,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:43:17,399 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:43:17,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-11-23 12:43:17,460 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/data/80ff1d312/b161c6fe591c480d93440c25689ed4aa/FLAG97f377bee [2021-11-23 12:43:17,896 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:43:17,897 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-11-23 12:43:17,902 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/data/80ff1d312/b161c6fe591c480d93440c25689ed4aa/FLAG97f377bee [2021-11-23 12:43:18,282 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/data/80ff1d312/b161c6fe591c480d93440c25689ed4aa [2021-11-23 12:43:18,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:43:18,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:43:18,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:43:18,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:43:18,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:43:18,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f75d04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18, skipping insertion in model container [2021-11-23 12:43:18,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,300 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:43:18,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:43:18,467 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:43:18,470 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:43:18,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:43:18,499 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:43:18,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18 WrapperNode [2021-11-23 12:43:18,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:43:18,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:43:18,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:43:18,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:43:18,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,529 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 9 [2021-11-23 12:43:18,530 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:43:18,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:43:18,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:43:18,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:43:18,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:43:18,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:43:18,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:43:18,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:43:18,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (1/1) ... [2021-11-23 12:43:18,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:18,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:18,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:18,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-23 12:43:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-11-23 12:43:18,636 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-11-23 12:43:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:43:18,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:43:18,691 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:43:18,693 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:43:18,783 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:43:18,793 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:43:18,794 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 12:43:18,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:43:18 BoogieIcfgContainer [2021-11-23 12:43:18,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:43:18,798 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-23 12:43:18,798 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-23 12:43:18,801 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-23 12:43:18,801 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-23 12:43:18,802 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 12:43:18" (1/3) ... [2021-11-23 12:43:18,803 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@65660c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 12:43:18, skipping insertion in model container [2021-11-23 12:43:18,803 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-23 12:43:18,803 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:43:18" (2/3) ... [2021-11-23 12:43:18,804 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@65660c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 12:43:18, skipping insertion in model container [2021-11-23 12:43:18,804 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-23 12:43:18,804 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:43:18" (3/3) ... [2021-11-23 12:43:18,806 INFO L388 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2021-11-23 12:43:18,881 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-23 12:43:18,881 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-23 12:43:18,881 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-23 12:43:18,882 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-23 12:43:18,882 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-23 12:43:18,882 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-23 12:43:18,882 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-23 12:43:18,882 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-23 12:43:18,893 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) [2021-11-23 12:43:18,914 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-23 12:43:18,914 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 12:43:18,914 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 12:43:18,921 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-11-23 12:43:18,921 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-23 12:43:18,921 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-23 12:43:18,922 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) [2021-11-23 12:43:18,924 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-23 12:43:18,924 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 12:43:18,924 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 12:43:18,924 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-11-23 12:43:18,924 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-23 12:43:18,932 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 [2021-11-23 12:43:18,932 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 [2021-11-23 12:43:18,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1202733, now seen corresponding path program 1 times [2021-11-23 12:43:18,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:18,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109192636] [2021-11-23 12:43:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:18,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:19,027 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:19,046 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:19,050 INFO L85 PathProgramCache]: Analyzing trace with hash 29937, now seen corresponding path program 1 times [2021-11-23 12:43:19,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:19,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908991144] [2021-11-23 12:43:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:19,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:19,058 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:19,064 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880581, now seen corresponding path program 1 times [2021-11-23 12:43:19,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:19,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476048229] [2021-11-23 12:43:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:19,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:19,075 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:19,104 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:19,214 INFO L210 LassoAnalysis]: Preferences: [2021-11-23 12:43:19,214 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-23 12:43:19,214 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-23 12:43:19,215 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-23 12:43:19,215 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-23 12:43:19,215 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:19,215 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-23 12:43:19,215 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-23 12:43:19,215 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2021-11-23 12:43:19,216 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-23 12:43:19,216 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-23 12:43:19,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,253 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,257 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,260 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,371 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-23 12:43:19,380 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-23 12:43:19,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:19,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:19,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:19,395 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:19,396 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:19,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-23 12:43:19,427 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:19,427 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:19,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:19,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:19,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:19,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:19,481 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:19,481 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:19,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-23 12:43:19,514 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:19,514 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:19,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:19,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:19,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:19,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:19,557 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:19,557 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:19,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-23 12:43:19,582 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:19,582 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:19,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:19,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:19,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:19,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:19,627 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:19,627 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:19,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-23 12:43:19,658 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:19,658 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:19,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:19,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:19,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:19,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:19,702 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:19,702 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:19,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-23 12:43:19,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:19,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:19,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:19,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:19,773 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-23 12:43:19,773 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:19,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-23 12:43:19,816 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:19,816 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] [2021-11-23 12:43:19,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:19,899 INFO L210 LassoAnalysis]: Preferences: [2021-11-23 12:43:19,899 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-23 12:43:19,899 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-23 12:43:19,900 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-23 12:43:19,900 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-23 12:43:19,900 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:19,900 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-23 12:43:19,900 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-23 12:43:19,900 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2021-11-23 12:43:19,900 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-23 12:43:19,901 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-23 12:43:19,903 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,923 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:19,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,006 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-23 12:43:20,007 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-23 12:43:20,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,014 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:20,014 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:20,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-23 12:43:20,032 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:20,033 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:20,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-11-23 12:43:20,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,130 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,135 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:20,135 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:20,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-23 12:43:20,165 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:20,165 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:20,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,190 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-23 12:43:20,191 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:20,191 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:20,218 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:20,218 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:20,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,242 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-23 12:43:20,250 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:20,250 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:20,261 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:20,261 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: [] [2021-11-23 12:43:20,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-23 12:43:20,300 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:20,300 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:20,308 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:20,308 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: [] [2021-11-23 12:43:20,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2021-11-23 12:43:20,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,332 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-23 12:43:20,334 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:20,334 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:20,343 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:20,343 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: [] [2021-11-23 12:43:20,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-11-23 12:43:20,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-23 12:43:20,372 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:20,372 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:20,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2021-11-23 12:43:20,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,405 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-23 12:43:20,407 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-23 12:43:20,407 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:20,474 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-23 12:43:20,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,485 INFO L210 LassoAnalysis]: Preferences: [2021-11-23 12:43:20,485 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-23 12:43:20,486 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-23 12:43:20,486 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-23 12:43:20,486 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-23 12:43:20,486 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,486 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-23 12:43:20,486 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-23 12:43:20,486 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2021-11-23 12:43:20,486 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-23 12:43:20,486 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-23 12:43:20,487 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,513 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,515 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,517 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,526 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:20,583 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-23 12:43:20,588 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-23 12:43:20,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,595 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 [2021-11-23 12:43:20,604 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:20,604 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-23 12:43:20,605 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:20,605 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-23 12:43:20,605 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:20,610 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-23 12:43:20,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-11-23 12:43:20,610 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-23 12:43:20,628 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-23 12:43:20,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,663 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-11-23 12:43:20,665 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 [2021-11-23 12:43:20,672 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:20,672 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-23 12:43:20,672 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:20,672 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-23 12:43:20,672 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:20,673 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-23 12:43:20,673 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-23 12:43:20,675 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-23 12:43:20,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-11-23 12:43:20,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-11-23 12:43:20,700 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 [2021-11-23 12:43:20,707 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:20,707 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-23 12:43:20,707 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:20,707 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-23 12:43:20,707 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:20,708 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-23 12:43:20,708 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-23 12:43:20,732 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-23 12:43:20,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,755 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-11-23 12:43:20,759 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 [2021-11-23 12:43:20,766 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:20,766 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-23 12:43:20,766 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:20,766 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-23 12:43:20,767 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:20,767 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-23 12:43:20,767 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-23 12:43:20,780 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-23 12:43:20,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,802 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-11-23 12:43:20,810 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 [2021-11-23 12:43:20,817 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:20,817 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-23 12:43:20,818 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:20,818 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-23 12:43:20,818 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:20,818 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-23 12:43:20,818 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-23 12:43:20,819 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-23 12:43:20,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,842 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-11-23 12:43:20,847 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 [2021-11-23 12:43:20,853 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:20,854 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-23 12:43:20,854 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:20,854 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-23 12:43:20,854 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:20,855 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-23 12:43:20,855 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-23 12:43:20,860 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-23 12:43:20,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,884 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,894 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 [2021-11-23 12:43:20,905 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:20,905 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-23 12:43:20,905 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:20,905 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-23 12:43:20,905 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:20,930 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-23 12:43:20,930 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-23 12:43:20,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-11-23 12:43:20,942 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-23 12:43:20,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:20,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:20,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:20,983 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:20,990 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 [2021-11-23 12:43:20,999 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:20,999 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-23 12:43:20,999 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:20,999 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-23 12:43:20,999 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:21,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-11-23 12:43:21,000 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-23 12:43:21,001 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-23 12:43:21,002 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-23 12:43:21,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-11-23 12:43:21,027 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:21,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:21,028 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:21,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-11-23 12:43:21,029 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 [2021-11-23 12:43:21,038 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:21,038 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:21,039 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-11-23 12:43:21,039 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:21,051 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2021-11-23 12:43:21,051 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-11-23 12:43:21,077 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-23 12:43:21,103 INFO L443 ModelExtractionUtils]: Simplification made 11 calls to the SMT solver. [2021-11-23 12:43:21,104 INFO L444 ModelExtractionUtils]: 1 out of 11 variables were initially zero. Simplification set additionally 7 variables to zero. [2021-11-23 12:43:21,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:21,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:21,111 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:21,113 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-23 12:43:21,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-11-23 12:43:21,149 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2021-11-23 12:43:21,150 INFO L513 LassoAnalysis]: Proved termination. [2021-11-23 12:43:21,150 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2021-11-23 12:43:21,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-11-23 12:43:21,182 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2021-11-23 12:43:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:21,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:43:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:43:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:21,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 12:43:21,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:43:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:21,342 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 [2021-11-23 12:43:21,343 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) [2021-11-23 12:43:21,457 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. [2021-11-23 12:43:21,459 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 [2021-11-23 12:43:21,463 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) [2021-11-23 12:43:21,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-11-23 12:43:21,465 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2021-11-23 12:43:21,466 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-23 12:43:21,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2021-11-23 12:43:21,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-23 12:43:21,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2021-11-23 12:43:21,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-23 12:43:21,468 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 43 transitions. [2021-11-23 12:43:21,472 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-23 12:43:21,478 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 20 states and 26 transitions. [2021-11-23 12:43:21,479 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2021-11-23 12:43:21,479 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2021-11-23 12:43:21,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2021-11-23 12:43:21,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-23 12:43:21,482 INFO L681 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-11-23 12:43:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2021-11-23 12:43:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-23 12:43:21,508 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) [2021-11-23 12:43:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-23 12:43:21,510 INFO L704 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-23 12:43:21,510 INFO L587 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-23 12:43:21,510 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-23 12:43:21,510 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 22 transitions. [2021-11-23 12:43:21,511 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-11-23 12:43:21,512 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 12:43:21,512 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 12:43:21,513 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:21,513 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:21,513 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 [2021-11-23 12:43:21,513 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 [2021-11-23 12:43:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 1 times [2021-11-23 12:43:21,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:21,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020545301] [2021-11-23 12:43:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:21,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:21,522 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:21,530 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:21,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1500125133, now seen corresponding path program 1 times [2021-11-23 12:43:21,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:21,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211461413] [2021-11-23 12:43:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:21,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:21,537 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:21,544 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash 122773219, now seen corresponding path program 1 times [2021-11-23 12:43:21,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:21,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457802387] [2021-11-23 12:43:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:21,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:21,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-23 12:43:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-23 12:43:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:43:21,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457802387] [2021-11-23 12:43:21,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457802387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:43:21,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240980521] [2021-11-23 12:43:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:21,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:43:21,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:21,648 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:43:21,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 12:43:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 12:43:21,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:43:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:43:21,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:43:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:43:21,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240980521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:43:21,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:43:21,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2021-11-23 12:43:21,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992578406] [2021-11-23 12:43:21,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:43:22,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:22,133 INFO L210 LassoAnalysis]: Preferences: [2021-11-23 12:43:22,134 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-23 12:43:22,134 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-23 12:43:22,134 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-23 12:43:22,134 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-23 12:43:22,134 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:22,134 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-23 12:43:22,134 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-23 12:43:22,134 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2021-11-23 12:43:22,134 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-23 12:43:22,134 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-23 12:43:22,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:22,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:22,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:22,182 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-23 12:43:22,182 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-23 12:43:22,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:22,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:22,186 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:22,190 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:22,191 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:22,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-11-23 12:43:22,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:22,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:22,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:22,252 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:22,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-11-23 12:43:22,258 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-23 12:43:22,259 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:24,252 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-23 12:43:24,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-11-23 12:43:24,255 INFO L210 LassoAnalysis]: Preferences: [2021-11-23 12:43:24,255 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-23 12:43:24,255 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-23 12:43:24,255 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-23 12:43:24,255 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-23 12:43:24,255 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:24,255 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-23 12:43:24,255 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-23 12:43:24,255 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2021-11-23 12:43:24,255 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-23 12:43:24,255 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-23 12:43:24,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:24,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:24,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:24,314 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-23 12:43:24,314 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-23 12:43:24,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:24,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:24,315 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:24,323 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 [2021-11-23 12:43:24,332 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-23 12:43:24,332 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-23 12:43:24,332 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-23 12:43:24,332 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-23 12:43:24,333 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-23 12:43:24,335 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-23 12:43:24,335 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-23 12:43:24,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-11-23 12:43:24,344 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-23 12:43:24,349 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-23 12:43:24,349 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-23 12:43:24,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:24,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:24,351 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:24,358 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-23 12:43:24,358 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-23 12:43:24,359 INFO L513 LassoAnalysis]: Proved termination. [2021-11-23 12:43:24,359 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2021-11-23 12:43:24,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-11-23 12:43:24,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:24,391 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-23 12:43:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:24,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:43:24,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:43:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:24,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 12:43:24,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:43:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:43:24,690 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 [2021-11-23 12:43:24,690 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) [2021-11-23 12:43:24,976 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. [2021-11-23 12:43:24,977 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 [2021-11-23 12:43:24,977 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) [2021-11-23 12:43:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2021-11-23 12:43:24,979 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 8 letters. [2021-11-23 12:43:24,980 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-23 12:43:24,980 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 19 letters. Loop has 8 letters. [2021-11-23 12:43:24,981 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-23 12:43:24,981 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 16 letters. [2021-11-23 12:43:24,981 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-23 12:43:24,981 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 83 states and 121 transitions. [2021-11-23 12:43:24,988 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2021-11-23 12:43:24,992 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 83 states to 59 states and 82 transitions. [2021-11-23 12:43:24,992 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-11-23 12:43:24,992 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2021-11-23 12:43:24,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 82 transitions. [2021-11-23 12:43:24,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-23 12:43:24,993 INFO L681 BuchiCegarLoop]: Abstraction has 59 states and 82 transitions. [2021-11-23 12:43:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 82 transitions. [2021-11-23 12:43:25,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-11-23 12:43:25,002 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) [2021-11-23 12:43:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2021-11-23 12:43:25,009 INFO L704 BuchiCegarLoop]: Abstraction has 53 states and 72 transitions. [2021-11-23 12:43:25,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:25,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 12:43:25,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-23 12:43:25,014 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) [2021-11-23 12:43:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:25,124 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-23 12:43:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:43:25,126 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 45 transitions. [2021-11-23 12:43:25,129 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 12:43:25,130 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 31 states and 35 transitions. [2021-11-23 12:43:25,130 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2021-11-23 12:43:25,132 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2021-11-23 12:43:25,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 35 transitions. [2021-11-23 12:43:25,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-23 12:43:25,133 INFO L681 BuchiCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 12:43:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 35 transitions. [2021-11-23 12:43:25,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-23 12:43:25,138 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) [2021-11-23 12:43:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-23 12:43:25,138 INFO L704 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-23 12:43:25,139 INFO L587 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-23 12:43:25,139 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-23 12:43:25,139 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2021-11-23 12:43:25,141 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 12:43:25,141 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 12:43:25,141 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 12:43:25,143 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:25,143 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-23 12:43:25,143 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 [2021-11-23 12:43:25,143 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 [2021-11-23 12:43:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:25,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1443446059, now seen corresponding path program 2 times [2021-11-23 12:43:25,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:25,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522325452] [2021-11-23 12:43:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:25,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:25,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-11-23 12:43:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:25,169 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:25,187 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:25,190 INFO L85 PathProgramCache]: Analyzing trace with hash 50937, now seen corresponding path program 2 times [2021-11-23 12:43:25,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:25,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505988166] [2021-11-23 12:43:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:25,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:25,195 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:25,202 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:25,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:25,204 INFO L85 PathProgramCache]: Analyzing trace with hash -488954971, now seen corresponding path program 3 times [2021-11-23 12:43:25,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:25,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048378076] [2021-11-23 12:43:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:25,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:25,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-23 12:43:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:43:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:43:25,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:43:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048378076] [2021-11-23 12:43:25,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048378076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:43:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127048611] [2021-11-23 12:43:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:43:25,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:43:25,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:25,366 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:43:25,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 12:43:25,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 12:43:25,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:43:25,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 12:43:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:43:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:43:25,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:43:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 12:43:25,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127048611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:43:25,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:43:25,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2021-11-23 12:43:25,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73033872] [2021-11-23 12:43:25,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:43:25,618 INFO L210 LassoAnalysis]: Preferences: [2021-11-23 12:43:25,618 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-23 12:43:25,618 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-23 12:43:25,619 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-23 12:43:25,619 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-23 12:43:25,619 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:25,619 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-23 12:43:25,619 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-23 12:43:25,619 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2021-11-23 12:43:25,619 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-23 12:43:25,619 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-23 12:43:25,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:25,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:25,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:25,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-23 12:43:25,671 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-23 12:43:25,671 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-23 12:43:25,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:25,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:25,674 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:25,682 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:25,682 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:25,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-11-23 12:43:25,702 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:25,702 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:25,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:25,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:25,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:25,738 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:25,740 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:25,740 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:25,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-11-23 12:43:25,757 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:25,757 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:25,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2021-11-23 12:43:25,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:25,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:25,783 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:25,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-11-23 12:43:25,786 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:25,787 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:25,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:25,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:25,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:25,827 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:25,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-11-23 12:43:25,834 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-23 12:43:25,834 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:26,595 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:26,595 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] [2021-11-23 12:43:26,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-11-23 12:43:26,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-23 12:43:26,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:43:26,617 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-23 12:43:26,619 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-23 12:43:26,619 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-23 12:43:26,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-11-23 12:43:26,628 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-23 12:43:26,628 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-23 12:43:26,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:26,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:43:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 12:43:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-23 12:43:26,647 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) [2021-11-23 12:43:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:43:26,782 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-11-23 12:43:26,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 12:43:26,783 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 29 transitions. [2021-11-23 12:43:26,784 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 12:43:26,785 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 28 states and 29 transitions. [2021-11-23 12:43:26,785 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-11-23 12:43:26,786 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2021-11-23 12:43:26,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 29 transitions. [2021-11-23 12:43:26,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-23 12:43:26,786 INFO L681 BuchiCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-23 12:43:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 29 transitions. [2021-11-23 12:43:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-11-23 12:43:26,788 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) [2021-11-23 12:43:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-23 12:43:26,789 INFO L704 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-23 12:43:26,789 INFO L587 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-23 12:43:26,789 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-23 12:43:26,789 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 23 transitions. [2021-11-23 12:43:26,790 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-23 12:43:26,790 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-23 12:43:26,790 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-23 12:43:26,790 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:43:26,791 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2021-11-23 12:43:26,791 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 [2021-11-23 12:43:26,791 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 [2021-11-23 12:43:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:26,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 2 times [2021-11-23 12:43:26,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:26,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479277450] [2021-11-23 12:43:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:26,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:26,796 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:26,806 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1133998729, now seen corresponding path program 2 times [2021-11-23 12:43:26,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:26,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564928946] [2021-11-23 12:43:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:26,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:26,812 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:26,817 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:26,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:43:26,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1734292557, now seen corresponding path program 4 times [2021-11-23 12:43:26,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:43:26,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548184069] [2021-11-23 12:43:26,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:43:26,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:43:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:26,825 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 12:43:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 12:43:26,832 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-23 12:43:27,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 12:43:27 BoogieIcfgContainer [2021-11-23 12:43:27,119 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-23 12:43:27,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 12:43:27,120 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 12:43:27,120 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 12:43:27,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:43:18" (3/4) ... [2021-11-23 12:43:27,123 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-11-23 12:43:27,152 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 12:43:27,158 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 12:43:27,159 INFO L158 Benchmark]: Toolchain (without parser) took 8873.18ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 63.7MB in the beginning and 61.3MB in the end (delta: 2.4MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. [2021-11-23 12:43:27,160 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: 43.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:43:27,161 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.19ms. Allocated memory is still 88.1MB. Free memory was 63.5MB in the beginning and 65.8MB in the end (delta: -2.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 12:43:27,161 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.68ms. Allocated memory is still 88.1MB. Free memory was 65.8MB in the beginning and 64.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:43:27,161 INFO L158 Benchmark]: Boogie Preprocessor took 14.77ms. Allocated memory is still 88.1MB. Free memory was 64.5MB in the beginning and 63.6MB in the end (delta: 868.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:43:27,162 INFO L158 Benchmark]: RCFGBuilder took 250.95ms. Allocated memory is still 88.1MB. Free memory was 63.6MB in the beginning and 55.7MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 12:43:27,162 INFO L158 Benchmark]: BuchiAutomizer took 8321.65ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 55.6MB in the beginning and 62.5MB in the end (delta: -6.9MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2021-11-23 12:43:27,163 INFO L158 Benchmark]: Witness Printer took 38.85ms. Allocated memory is still 107.0MB. Free memory was 62.5MB in the beginning and 61.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 12:43:27,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory was 61.3MB in the beginning and 61.3MB in the end (delta: 43.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 212.19ms. Allocated memory is still 88.1MB. Free memory was 63.5MB in the beginning and 65.8MB in the end (delta: -2.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.68ms. Allocated memory is still 88.1MB. Free memory was 65.8MB in the beginning and 64.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 14.77ms. Allocated memory is still 88.1MB. Free memory was 64.5MB in the beginning and 63.6MB in the end (delta: 868.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 250.95ms. Allocated memory is still 88.1MB. Free memory was 63.6MB in the beginning and 55.7MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 8321.65ms. Allocated memory was 88.1MB in the beginning and 107.0MB in the end (delta: 18.9MB). Free memory was 55.6MB in the beginning and 62.5MB in the end (delta: -6.9MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * Witness Printer took 38.85ms. Allocated memory is still 107.0MB. Free memory was 62.5MB in the beginning and 61.3MB in the end (delta: 1.2MB). There was no memory consumed. 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 8.2s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 6.9s. Construction of modules took 0.2s. Büchi inclusion checks took 0.9s. 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, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 67 mSDsluCounter, 168 SdHoareTripleChecker+Invalid, 0.2s 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, 0.0s 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: 122ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.5s - 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@1b59fea8=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@369b4359=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3345a7a5=0, \result=0, NULL=0, \old(x)=1, \result=0, x=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3fa1ea98=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! [2021-11-23 12:43:27,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 12:43:27,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-23 12:43:27,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c39897a0-2fec-492c-b155-01361fed8259/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with 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)