./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL --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 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:20:34,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:20:34,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:20:34,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:20:34,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:20:34,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:20:34,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:20:34,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:20:34,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:20:34,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:20:34,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:20:34,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:20:34,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:20:34,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:20:34,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:20:34,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:20:34,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:20:34,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:20:34,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:20:34,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:20:35,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:20:35,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:20:35,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:20:35,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:20:35,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:20:35,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:20:35,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:20:35,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:20:35,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:20:35,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:20:35,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:20:35,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:20:35,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:20:35,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:20:35,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:20:35,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:20:35,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:20:35,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:20:35,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:20:35,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:20:35,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:20:35,032 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-19 05:20:35,079 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:20:35,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:20:35,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:20:35,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:20:35,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:20:35,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:20:35,086 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:20:35,086 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-19 05:20:35,086 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-19 05:20:35,087 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-19 05:20:35,088 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-19 05:20:35,089 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-19 05:20:35,089 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-19 05:20:35,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:20:35,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 05:20:35,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:20:35,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:20:35,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-19 05:20:35,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-19 05:20:35,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-19 05:20:35,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:20:35,092 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-19 05:20:35,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:20:35,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-19 05:20:35,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:20:35,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:20:35,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:20:35,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:20:35,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:20:35,098 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-19 05:20:35,098 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_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c [2021-11-19 05:20:35,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:20:35,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:20:35,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:20:35,489 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:20:35,491 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:20:35,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2021-11-19 05:20:35,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/data/65a0637d2/073f914a3ed84a76ae24eb1d8fade656/FLAGced7faa48 [2021-11-19 05:20:36,155 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:20:36,156 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2021-11-19 05:20:36,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/data/65a0637d2/073f914a3ed84a76ae24eb1d8fade656/FLAGced7faa48 [2021-11-19 05:20:36,552 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/data/65a0637d2/073f914a3ed84a76ae24eb1d8fade656 [2021-11-19 05:20:36,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:20:36,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:20:36,561 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:20:36,561 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:20:36,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:20:36,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d22c7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36, skipping insertion in model container [2021-11-19 05:20:36,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:20:36,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:20:36,805 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:20:36,810 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:20:36,827 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:20:36,848 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:20:36,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36 WrapperNode [2021-11-19 05:20:36,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:20:36,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:20:36,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:20:36,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:20:36,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,871 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,896 INFO L137 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2021-11-19 05:20:36,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:20:36,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:20:36,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:20:36,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:20:36,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:20:36,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:20:36,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:20:36,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:20:36,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (1/1) ... [2021-11-19 05:20:36,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:36,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:36,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:37,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-19 05:20:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-11-19 05:20:37,052 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-11-19 05:20:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-11-19 05:20:37,054 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-11-19 05:20:37,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:20:37,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:20:37,134 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:20:37,137 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:20:37,298 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:20:37,322 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:20:37,322 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 05:20:37,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:37 BoogieIcfgContainer [2021-11-19 05:20:37,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:20:37,326 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-19 05:20:37,326 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-19 05:20:37,331 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-19 05:20:37,331 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-19 05:20:37,332 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 05:20:36" (1/3) ... [2021-11-19 05:20:37,334 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3abf0a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 05:20:37, skipping insertion in model container [2021-11-19 05:20:37,334 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-19 05:20:37,334 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:20:36" (2/3) ... [2021-11-19 05:20:37,335 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3abf0a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 05:20:37, skipping insertion in model container [2021-11-19 05:20:37,335 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-19 05:20:37,335 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:37" (3/3) ... [2021-11-19 05:20:37,337 INFO L388 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2021-11-19 05:20:37,398 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-19 05:20:37,399 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-19 05:20:37,399 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-19 05:20:37,399 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-19 05:20:37,399 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-19 05:20:37,399 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-19 05:20:37,400 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-19 05:20:37,400 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-19 05:20:37,421 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 05:20:37,453 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-19 05:20:37,454 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-19 05:20:37,454 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-19 05:20:37,464 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-19 05:20:37,464 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:37,464 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-19 05:20:37,465 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 05:20:37,472 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-19 05:20:37,474 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-19 05:20:37,474 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-19 05:20:37,475 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-19 05:20:37,477 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:37,487 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 14#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 10#L25true call main_#t~ret6#1 := rec2(main_~x~0#1);< 17#rec2ENTRYtrue [2021-11-19 05:20:37,488 INFO L793 eck$LassoCheckResult]: Loop: 17#rec2ENTRYtrue ~j := #in~j; 18#L18true assume !(~j <= 0); 21#L20true call #t~ret3 := rec1(~j - 1);< 23#rec1ENTRYtrue ~i := #in~i; 19#L12true assume ~i <= 0;#res := 0; 15#rec1FINALtrue assume true; 16#rec1EXITtrue >#34#return; 4#L20-1true call #t~ret4 := rec2(#t~ret3);< 17#rec2ENTRYtrue [2021-11-19 05:20:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2021-11-19 05:20:37,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:37,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87797055] [2021-11-19 05:20:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:37,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:37,605 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:37,634 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2021-11-19 05:20:37,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:37,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035081996] [2021-11-19 05:20:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:37,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:37,671 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:37,685 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1203131828, now seen corresponding path program 1 times [2021-11-19 05:20:37,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:37,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535701332] [2021-11-19 05:20:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:37,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:37,711 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:37,736 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:38,166 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:38,167 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:38,167 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:38,167 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:38,167 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-19 05:20:38,168 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,168 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:38,168 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:38,168 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2021-11-19 05:20:38,168 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:38,169 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:38,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,204 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,279 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:38,280 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-19 05:20:38,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:38,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:38,295 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:38,296 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:38,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-19 05:20:38,314 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:38,314 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:38,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:38,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:38,345 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:38,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-19 05:20:38,352 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:38,353 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:38,378 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:38,378 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:38,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-11-19 05:20:38,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:38,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:38,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-19 05:20:38,425 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:38,425 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:38,436 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:38,437 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:38,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:38,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:38,469 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:38,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-19 05:20:38,471 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:38,472 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:38,483 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:38,484 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:38,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:38,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:38,514 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:38,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-19 05:20:38,517 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:38,517 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:38,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-11-19 05:20:38,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:38,606 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:38,623 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-19 05:20:38,624 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:38,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-19 05:20:38,650 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-19 05:20:38,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:38,694 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:38,694 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:38,694 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:38,694 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:38,694 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-19 05:20:38,695 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,695 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:38,695 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:38,695 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2021-11-19 05:20:38,695 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:38,696 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:38,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:38,804 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:38,810 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-19 05:20:38,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:38,821 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:38,831 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 [2021-11-19 05:20:38,844 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:38,844 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:38,845 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:38,845 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:38,846 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:38,849 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:38,849 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:38,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-19 05:20:38,874 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:38,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:38,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:38,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:38,934 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:38,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-19 05:20:38,937 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 [2021-11-19 05:20:38,947 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:38,947 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:38,947 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:38,947 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:38,948 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:38,949 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:38,949 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:38,961 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:39,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:39,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:39,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:39,008 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:39,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-19 05:20:39,011 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 [2021-11-19 05:20:39,020 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:39,020 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:39,021 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:39,021 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:39,021 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:39,022 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:39,022 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:39,053 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:39,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:39,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:39,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:39,102 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:39,114 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 [2021-11-19 05:20:39,127 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:39,127 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:39,127 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:39,127 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:39,127 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:39,133 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:39,133 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:39,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-19 05:20:39,149 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-19 05:20:39,174 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-19 05:20:39,174 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-19 05:20:39,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:39,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:39,190 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:39,207 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-19 05:20:39,207 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-19 05:20:39,208 INFO L513 LassoAnalysis]: Proved termination. [2021-11-19 05:20:39,208 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2021-11-19 05:20:39,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-19 05:20:39,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:39,242 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-19 05:20:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:39,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:20:39,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:39,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 05:20:39,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:20:39,611 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2021-11-19 05:20:39,613 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:20:40,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:40,244 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6). Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 195 states and 280 transitions. Complement of second has 61 states. [2021-11-19 05:20:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2021-11-19 05:20:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:20:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 58 transitions. [2021-11-19 05:20:40,264 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 8 letters. [2021-11-19 05:20:40,268 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:40,268 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 11 letters. Loop has 8 letters. [2021-11-19 05:20:40,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:40,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 16 letters. [2021-11-19 05:20:40,275 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:40,276 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 195 states and 280 transitions. [2021-11-19 05:20:40,317 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-19 05:20:40,337 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 195 states to 83 states and 121 transitions. [2021-11-19 05:20:40,340 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 36 [2021-11-19 05:20:40,341 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2021-11-19 05:20:40,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 121 transitions. [2021-11-19 05:20:40,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:20:40,351 INFO L681 BuchiCegarLoop]: Abstraction has 83 states and 121 transitions. [2021-11-19 05:20:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 121 transitions. [2021-11-19 05:20:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-11-19 05:20:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2021-11-19 05:20:40,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 84 transitions. [2021-11-19 05:20:40,416 INFO L704 BuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2021-11-19 05:20:40,417 INFO L587 BuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2021-11-19 05:20:40,417 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-19 05:20:40,417 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 84 transitions. [2021-11-19 05:20:40,426 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-19 05:20:40,426 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-19 05:20:40,426 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-19 05:20:40,427 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:40,427 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-19 05:20:40,428 INFO L791 eck$LassoCheckResult]: Stem: 355#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 356#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 350#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 363#rec2ENTRY ~j := #in~j; 384#L18 assume !(~j <= 0); 358#L20 call #t~ret3 := rec1(~j - 1);< 387#rec1ENTRY ~i := #in~i; 385#L12 assume !(~i <= 0); 367#L14 call #t~ret0 := rec1(~i - 2);< 371#rec1ENTRY [2021-11-19 05:20:40,428 INFO L793 eck$LassoCheckResult]: Loop: 371#rec1ENTRY ~i := #in~i; 396#L12 assume !(~i <= 0); 370#L14 call #t~ret0 := rec1(~i - 2);< 371#rec1ENTRY [2021-11-19 05:20:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2021-11-19 05:20:40,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:40,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307415270] [2021-11-19 05:20:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:40,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:40,455 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:40,471 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2021-11-19 05:20:40,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:40,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100845106] [2021-11-19 05:20:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:40,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:40,483 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:40,511 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:40,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2021-11-19 05:20:40,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:40,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154066709] [2021-11-19 05:20:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:40,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:40,527 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:40,538 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:40,608 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:40,608 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:40,608 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:40,608 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:40,608 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-19 05:20:40,608 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:40,609 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:40,609 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:40,609 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2021-11-19 05:20:40,609 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:40,609 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:40,612 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:40,615 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:40,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:40,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:40,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:40,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:40,689 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:40,690 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-19 05:20:40,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:40,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:40,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:40,697 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:40,697 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:40,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-19 05:20:40,719 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:40,719 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:40,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:40,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:40,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:40,751 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:40,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-19 05:20:40,759 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:40,759 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:40,777 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:40,777 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:40,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:40,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:40,811 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:40,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-19 05:20:40,813 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:40,813 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:40,825 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:40,825 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:40,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:40,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:40,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:40,853 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:40,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-11-19 05:20:40,855 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:40,855 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:40,868 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:40,868 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:40,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:40,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:40,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:40,900 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:40,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-11-19 05:20:40,903 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:40,903 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:40,919 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:40,920 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:40,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:40,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:40,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:40,948 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:40,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-11-19 05:20:40,951 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:40,951 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:41,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:41,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:41,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:41,043 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:41,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-11-19 05:20:41,051 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-19 05:20:41,051 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:41,198 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-19 05:20:41,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:41,207 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:41,207 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:41,207 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:41,207 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:41,208 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-19 05:20:41,208 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:41,208 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:41,208 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:41,208 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2021-11-19 05:20:41,208 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:41,208 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:41,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:41,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:41,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:41,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:41,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:41,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:41,268 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:41,268 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-19 05:20:41,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:41,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:41,270 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:41,286 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 [2021-11-19 05:20:41,299 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:41,299 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:41,299 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:41,299 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:41,299 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:41,300 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:41,301 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:41,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-11-19 05:20:41,313 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:41,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:41,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:41,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:41,364 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:41,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-11-19 05:20:41,372 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 [2021-11-19 05:20:41,385 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:41,385 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:41,385 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:41,385 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:41,385 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:41,386 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:41,386 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:41,401 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:41,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:41,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:41,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:41,452 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:41,455 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 [2021-11-19 05:20:41,467 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:41,467 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:41,468 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:41,468 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:41,468 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:41,469 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:41,469 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:41,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-11-19 05:20:41,485 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:41,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:41,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:41,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:41,534 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:41,542 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 [2021-11-19 05:20:41,554 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:41,554 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:41,554 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:41,554 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:41,554 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:41,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-11-19 05:20:41,555 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:41,555 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:41,557 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:41,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-11-19 05:20:41,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:41,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:41,585 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:41,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-11-19 05:20:41,587 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 [2021-11-19 05:20:41,597 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:41,597 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:41,597 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:41,597 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:41,597 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:41,599 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:41,599 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:41,625 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-19 05:20:41,632 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-19 05:20:41,632 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-19 05:20:41,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:41,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:41,638 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:41,642 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-19 05:20:41,643 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-19 05:20:41,643 INFO L513 LassoAnalysis]: Proved termination. [2021-11-19 05:20:41,643 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-11-19 05:20:41,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-11-19 05:20:41,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-11-19 05:20:41,669 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-19 05:20:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:41,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:20:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:41,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:20:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:20:41,878 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-11-19 05:20:41,884 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 32 Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:20:41,955 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 32. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 106 states and 150 transitions. Complement of second has 13 states. [2021-11-19 05:20:41,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-19 05:20:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:20:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2021-11-19 05:20:41,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 3 letters. [2021-11-19 05:20:41,958 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:41,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2021-11-19 05:20:41,958 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:41,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 6 letters. [2021-11-19 05:20:41,959 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:41,959 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 106 states and 150 transitions. [2021-11-19 05:20:41,962 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-19 05:20:41,968 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 106 states to 94 states and 138 transitions. [2021-11-19 05:20:41,968 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2021-11-19 05:20:41,968 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2021-11-19 05:20:41,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 138 transitions. [2021-11-19 05:20:41,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:20:41,970 INFO L681 BuchiCegarLoop]: Abstraction has 94 states and 138 transitions. [2021-11-19 05:20:41,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 138 transitions. [2021-11-19 05:20:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-11-19 05:20:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 58 states have internal predecessors, (62), 27 states have call successors, (27), 15 states have call predecessors, (27), 12 states have return successors, (41), 16 states have call predecessors, (41), 22 states have call successors, (41) [2021-11-19 05:20:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2021-11-19 05:20:41,986 INFO L704 BuchiCegarLoop]: Abstraction has 90 states and 130 transitions. [2021-11-19 05:20:41,986 INFO L587 BuchiCegarLoop]: Abstraction has 90 states and 130 transitions. [2021-11-19 05:20:41,986 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-19 05:20:41,987 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 90 states and 130 transitions. [2021-11-19 05:20:41,989 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-19 05:20:41,989 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-19 05:20:41,989 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-19 05:20:41,990 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:41,991 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-19 05:20:41,991 INFO L791 eck$LassoCheckResult]: Stem: 587#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 588#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 581#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 604#rec2ENTRY ~j := #in~j; 649#L18 assume !(~j <= 0); 627#L20 call #t~ret3 := rec1(~j - 1);< 646#rec1ENTRY ~i := #in~i; 643#L12 assume !(~i <= 0); 593#L14 call #t~ret0 := rec1(~i - 2);< 642#rec1ENTRY ~i := #in~i; 645#L12 assume ~i <= 0;#res := 0; 641#rec1FINAL assume true; 637#rec1EXIT >#28#return; 590#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 605#rec1ENTRY [2021-11-19 05:20:41,991 INFO L793 eck$LassoCheckResult]: Loop: 605#rec1ENTRY ~i := #in~i; 652#L12 assume !(~i <= 0); 597#L14 call #t~ret0 := rec1(~i - 2);< 605#rec1ENTRY [2021-11-19 05:20:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2021-11-19 05:20:41,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:41,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405953449] [2021-11-19 05:20:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:41,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:42,012 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:42,031 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2021-11-19 05:20:42,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:42,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447261939] [2021-11-19 05:20:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:42,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:42,042 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:42,049 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2021-11-19 05:20:42,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:42,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426679445] [2021-11-19 05:20:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:42,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:42,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:42,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:20:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:20:42,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:20:42,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426679445] [2021-11-19 05:20:42,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426679445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:20:42,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:20:42,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 05:20:42,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005495222] [2021-11-19 05:20:42,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:20:42,292 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:42,292 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:42,293 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:42,293 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:42,293 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-19 05:20:42,293 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:42,293 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:42,293 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:42,293 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2021-11-19 05:20:42,293 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:42,294 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:42,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,346 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:42,346 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-19 05:20:42,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:42,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:42,350 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:42,355 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:42,356 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:42,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-11-19 05:20:42,382 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:42,382 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:42,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-11-19 05:20:42,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:42,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:42,415 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:42,424 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:42,424 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:42,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-11-19 05:20:42,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:42,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:42,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:42,478 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:42,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-19 05:20:42,480 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:42,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-11-19 05:20:42,550 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-19 05:20:42,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:42,558 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:42,558 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:42,559 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:42,559 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:42,559 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-19 05:20:42,559 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:42,559 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:42,559 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:42,559 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2021-11-19 05:20:42,559 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:42,559 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:42,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,579 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:42,611 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:42,611 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-19 05:20:42,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:42,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:42,613 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:42,623 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 [2021-11-19 05:20:42,635 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:42,635 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:42,635 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:42,635 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:42,635 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:42,636 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:42,636 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:42,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-11-19 05:20:42,649 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:42,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:42,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:42,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:42,698 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:42,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-11-19 05:20:42,701 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 [2021-11-19 05:20:42,712 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:42,713 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:42,713 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:42,713 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:42,713 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:42,714 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:42,714 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:42,729 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-19 05:20:42,742 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-19 05:20:42,742 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-19 05:20:42,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:42,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:42,744 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:42,750 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-19 05:20:42,750 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-19 05:20:42,751 INFO L513 LassoAnalysis]: Proved termination. [2021-11-19 05:20:42,751 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-11-19 05:20:42,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-11-19 05:20:42,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-11-19 05:20:42,785 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-19 05:20:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:42,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 05:20:42,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:43,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:20:43,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:20:43,057 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 [2021-11-19 05:20:43,057 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 90 states and 130 transitions. cyclomatic complexity: 47 Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:20:43,182 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 90 states and 130 transitions. cyclomatic complexity: 47. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 135 states and 194 transitions. Complement of second has 14 states. [2021-11-19 05:20:43,189 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 [2021-11-19 05:20:43,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:20:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2021-11-19 05:20:43,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 3 letters. [2021-11-19 05:20:43,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:43,192 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 17 letters. Loop has 3 letters. [2021-11-19 05:20:43,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:43,192 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 6 letters. [2021-11-19 05:20:43,193 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:43,195 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 194 transitions. [2021-11-19 05:20:43,200 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-19 05:20:43,221 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 123 states and 182 transitions. [2021-11-19 05:20:43,221 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2021-11-19 05:20:43,222 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2021-11-19 05:20:43,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 182 transitions. [2021-11-19 05:20:43,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:20:43,223 INFO L681 BuchiCegarLoop]: Abstraction has 123 states and 182 transitions. [2021-11-19 05:20:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states and 182 transitions. [2021-11-19 05:20:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2021-11-19 05:20:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.2307692307692308) internal successors, (80), 74 states have internal predecessors, (80), 33 states have call successors, (33), 19 states have call predecessors, (33), 16 states have return successors, (53), 20 states have call predecessors, (53), 28 states have call successors, (53) [2021-11-19 05:20:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 166 transitions. [2021-11-19 05:20:43,241 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 166 transitions. [2021-11-19 05:20:43,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:20:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:20:43,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:20:43,247 INFO L87 Difference]: Start difference. First operand 114 states and 166 transitions. Second operand has 6 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:20:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:20:43,305 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2021-11-19 05:20:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:20:43,306 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 176 transitions. [2021-11-19 05:20:43,311 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2021-11-19 05:20:43,317 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 122 states and 174 transitions. [2021-11-19 05:20:43,318 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2021-11-19 05:20:43,318 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2021-11-19 05:20:43,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 174 transitions. [2021-11-19 05:20:43,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:20:43,319 INFO L681 BuchiCegarLoop]: Abstraction has 122 states and 174 transitions. [2021-11-19 05:20:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 174 transitions. [2021-11-19 05:20:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-11-19 05:20:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 64 states have internal predecessors, (68), 31 states have call successors, (31), 17 states have call predecessors, (31), 14 states have return successors, (45), 20 states have call predecessors, (45), 26 states have call successors, (45) [2021-11-19 05:20:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2021-11-19 05:20:43,335 INFO L704 BuchiCegarLoop]: Abstraction has 102 states and 144 transitions. [2021-11-19 05:20:43,335 INFO L587 BuchiCegarLoop]: Abstraction has 102 states and 144 transitions. [2021-11-19 05:20:43,335 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-19 05:20:43,335 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 102 states and 144 transitions. [2021-11-19 05:20:43,337 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-11-19 05:20:43,337 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-19 05:20:43,338 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-19 05:20:43,339 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:43,339 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:43,339 INFO L791 eck$LassoCheckResult]: Stem: 1150#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1151#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1144#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1167#rec2ENTRY ~j := #in~j; 1210#L18 assume !(~j <= 0); 1153#L20 call #t~ret3 := rec1(~j - 1);< 1209#rec1ENTRY ~i := #in~i; 1208#L12 assume !(~i <= 0); 1171#L14 call #t~ret0 := rec1(~i - 2);< 1206#rec1ENTRY ~i := #in~i; 1204#L12 assume !(~i <= 0); 1170#L14 call #t~ret0 := rec1(~i - 2);< 1203#rec1ENTRY ~i := #in~i; 1205#L12 assume ~i <= 0;#res := 0; 1234#rec1FINAL assume true; 1235#rec1EXIT >#28#return; 1181#L14-1 [2021-11-19 05:20:43,340 INFO L793 eck$LassoCheckResult]: Loop: 1181#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1182#rec1ENTRY ~i := #in~i; 1194#L12 assume ~i <= 0;#res := 0; 1185#rec1FINAL assume true; 1187#rec1EXIT >#30#return; 1168#L14-2 call #t~ret2 := rec1(#t~ret1);< 1177#rec1ENTRY ~i := #in~i; 1233#L12 assume !(~i <= 0); 1172#L14 call #t~ret0 := rec1(~i - 2);< 1177#rec1ENTRY ~i := #in~i; 1233#L12 assume ~i <= 0;#res := 0; 1232#rec1FINAL assume true; 1227#rec1EXIT >#28#return; 1181#L14-1 [2021-11-19 05:20:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2021-11-19 05:20:43,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:43,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757830147] [2021-11-19 05:20:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:43,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:43,349 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:43,359 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:43,360 INFO L85 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2021-11-19 05:20:43,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:43,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141893489] [2021-11-19 05:20:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:43,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:43,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:20:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:43,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:20:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:20:43,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:20:43,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141893489] [2021-11-19 05:20:43,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141893489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:20:43,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466441308] [2021-11-19 05:20:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:43,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:20:43,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:43,430 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:20:43,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-19 05:20:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:43,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 05:20:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:20:43,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:20:43,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466441308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:20:43,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:20:43,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 05:20:43,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527209458] [2021-11-19 05:20:43,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:20:43,554 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-11-19 05:20:43,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:20:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:20:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:20:43,559 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. cyclomatic complexity: 49 Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:20:43,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:20:43,621 INFO L93 Difference]: Finished difference Result 118 states and 162 transitions. [2021-11-19 05:20:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:20:43,647 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 118 states and 162 transitions. [2021-11-19 05:20:43,651 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-19 05:20:43,656 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 118 states to 118 states and 162 transitions. [2021-11-19 05:20:43,667 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2021-11-19 05:20:43,668 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 54 [2021-11-19 05:20:43,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 162 transitions. [2021-11-19 05:20:43,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:20:43,669 INFO L681 BuchiCegarLoop]: Abstraction has 118 states and 162 transitions. [2021-11-19 05:20:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 162 transitions. [2021-11-19 05:20:43,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2021-11-19 05:20:43,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 70 states have internal predecessors, (74), 35 states have call successors, (35), 19 states have call predecessors, (35), 16 states have return successors, (49), 24 states have call predecessors, (49), 30 states have call successors, (49) [2021-11-19 05:20:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2021-11-19 05:20:43,697 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 158 transitions. [2021-11-19 05:20:43,697 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 158 transitions. [2021-11-19 05:20:43,697 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-11-19 05:20:43,697 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 158 transitions. [2021-11-19 05:20:43,698 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-19 05:20:43,699 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-19 05:20:43,699 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-19 05:20:43,702 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:43,702 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:43,703 INFO L791 eck$LassoCheckResult]: Stem: 1429#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1430#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 1424#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 1446#rec2ENTRY ~j := #in~j; 1492#L18 assume !(~j <= 0); 1432#L20 call #t~ret3 := rec1(~j - 1);< 1491#rec1ENTRY ~i := #in~i; 1490#L12 assume !(~i <= 0); 1455#L14 call #t~ret0 := rec1(~i - 2);< 1488#rec1ENTRY ~i := #in~i; 1489#L12 assume ~i <= 0;#res := 0; 1514#rec1FINAL assume true; 1513#rec1EXIT >#28#return; 1480#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1463#rec1ENTRY ~i := #in~i; 1481#L12 assume ~i <= 0;#res := 0; 1516#rec1FINAL assume true; 1512#rec1EXIT >#30#return; 1502#L14-2 call #t~ret2 := rec1(#t~ret1);< 1457#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1501#rec1EXIT >#32#return; 1431#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1434#rec1FINAL assume true; 1485#rec1EXIT >#34#return; 1422#L20-1 [2021-11-19 05:20:43,703 INFO L793 eck$LassoCheckResult]: Loop: 1422#L20-1 call #t~ret4 := rec2(#t~ret3);< 1426#rec2ENTRY ~j := #in~j; 1471#L18 assume !(~j <= 0); 1448#L20 call #t~ret3 := rec1(~j - 1);< 1477#rec1ENTRY ~i := #in~i; 1515#L12 assume !(~i <= 0); 1452#L14 call #t~ret0 := rec1(~i - 2);< 1477#rec1ENTRY ~i := #in~i; 1515#L12 assume ~i <= 0;#res := 0; 1511#rec1FINAL assume true; 1503#rec1EXIT >#28#return; 1462#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1463#rec1ENTRY ~i := #in~i; 1481#L12 assume ~i <= 0;#res := 0; 1516#rec1FINAL assume true; 1512#rec1EXIT >#30#return; 1447#L14-2 call #t~ret2 := rec1(#t~ret1);< 1457#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1501#rec1EXIT >#32#return; 1484#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1496#rec1FINAL assume true; 1483#rec1EXIT >#34#return; 1422#L20-1 [2021-11-19 05:20:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:43,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1231361643, now seen corresponding path program 1 times [2021-11-19 05:20:43,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:43,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835635461] [2021-11-19 05:20:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:43,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:43,732 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:43,762 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:43,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:43,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1591101301, now seen corresponding path program 1 times [2021-11-19 05:20:43,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:43,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050248679] [2021-11-19 05:20:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:43,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:43,794 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:43,817 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:43,822 INFO L85 PathProgramCache]: Analyzing trace with hash 774680821, now seen corresponding path program 1 times [2021-11-19 05:20:43,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:43,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127681252] [2021-11-19 05:20:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:43,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:43,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:20:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:43,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:20:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:20:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:20:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:44,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-11-19 05:20:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:44,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:20:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:44,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:20:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:44,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:20:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 05:20:44,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:20:44,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127681252] [2021-11-19 05:20:44,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127681252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:20:44,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427942605] [2021-11-19 05:20:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:44,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:20:44,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:44,101 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:20:44,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 05:20:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:20:44,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 05:20:44,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:20:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-19 05:20:44,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427942605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:20:44,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:20:44,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 12 [2021-11-19 05:20:44,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333671876] [2021-11-19 05:20:44,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:20:45,007 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:45,007 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:45,007 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:45,007 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:45,007 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-19 05:20:45,007 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:45,007 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:45,007 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:45,008 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2021-11-19 05:20:45,008 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:45,008 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:45,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:45,020 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:45,026 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:45,063 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:45,064 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-19 05:20:45,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:45,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:45,083 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:45,085 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:45,085 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:45,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-11-19 05:20:45,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:45,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:45,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:45,127 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:45,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-11-19 05:20:45,129 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-19 05:20:45,129 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:50,364 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-19 05:20:50,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:50,368 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:50,368 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:50,368 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:50,368 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:50,368 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-19 05:20:50,368 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:50,368 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:50,369 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:50,369 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2021-11-19 05:20:50,369 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:50,369 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:50,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:50,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:50,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:50,427 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:50,427 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-19 05:20:50,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:50,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:50,429 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:50,444 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 [2021-11-19 05:20:50,456 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:50,456 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:50,456 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:50,456 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:50,456 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:50,460 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:50,460 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:50,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-11-19 05:20:50,473 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-19 05:20:50,478 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-19 05:20:50,479 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-19 05:20:50,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:50,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:50,485 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:50,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-11-19 05:20:50,487 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-19 05:20:50,487 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-19 05:20:50,487 INFO L513 LassoAnalysis]: Proved termination. [2021-11-19 05:20:50,487 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2021-11-19 05:20:50,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:50,520 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-19 05:20:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:20:50,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:50,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 05:20:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:20:51,459 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2021-11-19 05:20:51,460 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 158 transitions. cyclomatic complexity: 51 Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:20:51,930 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 158 transitions. cyclomatic complexity: 51. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Result 585 states and 904 transitions. Complement of second has 45 states. [2021-11-19 05:20:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2021-11-19 05:20:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:20:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 53 transitions. [2021-11-19 05:20:51,932 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 24 letters. [2021-11-19 05:20:51,933 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:51,933 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 50 letters. Loop has 24 letters. [2021-11-19 05:20:51,935 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:51,935 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 48 letters. [2021-11-19 05:20:51,936 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:51,936 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 904 transitions. [2021-11-19 05:20:51,958 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2021-11-19 05:20:51,979 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 433 states and 650 transitions. [2021-11-19 05:20:51,980 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2021-11-19 05:20:51,983 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 142 [2021-11-19 05:20:51,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 433 states and 650 transitions. [2021-11-19 05:20:51,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:20:51,988 INFO L681 BuchiCegarLoop]: Abstraction has 433 states and 650 transitions. [2021-11-19 05:20:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states and 650 transitions. [2021-11-19 05:20:52,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 384. [2021-11-19 05:20:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 226 states have internal predecessors, (232), 125 states have call successors, (129), 57 states have call predecessors, (129), 56 states have return successors, (174), 100 states have call predecessors, (174), 116 states have call successors, (174) [2021-11-19 05:20:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 535 transitions. [2021-11-19 05:20:52,088 INFO L704 BuchiCegarLoop]: Abstraction has 384 states and 535 transitions. [2021-11-19 05:20:52,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:20:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:20:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:20:52,090 INFO L87 Difference]: Start difference. First operand 384 states and 535 transitions. Second operand has 13 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 05:20:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:20:52,332 INFO L93 Difference]: Finished difference Result 443 states and 646 transitions. [2021-11-19 05:20:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:20:52,334 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 443 states and 646 transitions. [2021-11-19 05:20:52,346 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2021-11-19 05:20:52,356 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 443 states to 350 states and 496 transitions. [2021-11-19 05:20:52,356 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 132 [2021-11-19 05:20:52,357 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2021-11-19 05:20:52,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 350 states and 496 transitions. [2021-11-19 05:20:52,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:20:52,358 INFO L681 BuchiCegarLoop]: Abstraction has 350 states and 496 transitions. [2021-11-19 05:20:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states and 496 transitions. [2021-11-19 05:20:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 315. [2021-11-19 05:20:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 169 states have (on average 1.1005917159763314) internal successors, (186), 183 states have internal predecessors, (186), 100 states have call successors, (102), 49 states have call predecessors, (102), 46 states have return successors, (128), 82 states have call predecessors, (128), 84 states have call successors, (128) [2021-11-19 05:20:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2021-11-19 05:20:52,382 INFO L704 BuchiCegarLoop]: Abstraction has 315 states and 416 transitions. [2021-11-19 05:20:52,382 INFO L587 BuchiCegarLoop]: Abstraction has 315 states and 416 transitions. [2021-11-19 05:20:52,382 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-11-19 05:20:52,382 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 315 states and 416 transitions. [2021-11-19 05:20:52,386 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2021-11-19 05:20:52,386 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-19 05:20:52,387 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-19 05:20:52,388 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:52,388 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-19 05:20:52,389 INFO L791 eck$LassoCheckResult]: Stem: 3569#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3570#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 3567#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 3586#rec2ENTRY ~j := #in~j; 3643#L18 assume !(~j <= 0); 3640#L20 call #t~ret3 := rec1(~j - 1);< 3641#rec1ENTRY ~i := #in~i; 3657#L12 assume !(~i <= 0); 3647#L14 call #t~ret0 := rec1(~i - 2);< 3656#rec1ENTRY ~i := #in~i; 3662#L12 assume ~i <= 0;#res := 0; 3726#rec1FINAL assume true; 3723#rec1EXIT >#28#return; 3718#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3719#rec1ENTRY ~i := #in~i; 3722#L12 assume ~i <= 0;#res := 0; 3721#rec1FINAL assume true; 3717#rec1EXIT >#30#return; 3710#L14-2 call #t~ret2 := rec1(#t~ret1);< 3715#rec1ENTRY ~i := #in~i; 3720#L12 assume ~i <= 0;#res := 0; 3716#rec1FINAL assume true; 3714#rec1EXIT >#32#return; 3713#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 3746#rec1FINAL assume true; 3744#rec1EXIT >#34#return; 3606#L20-1 call #t~ret4 := rec2(#t~ret3);< 3605#rec2ENTRY ~j := #in~j; 3607#L18 assume !(~j <= 0); 3611#L20 call #t~ret3 := rec1(~j - 1);< 3621#rec1ENTRY ~i := #in~i; 3615#L12 assume !(~i <= 0); 3617#L14 call #t~ret0 := rec1(~i - 2);< 3620#rec1ENTRY [2021-11-19 05:20:52,389 INFO L793 eck$LassoCheckResult]: Loop: 3620#rec1ENTRY ~i := #in~i; 3734#L12 assume !(~i <= 0); 3703#L14 call #t~ret0 := rec1(~i - 2);< 3620#rec1ENTRY [2021-11-19 05:20:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1565705522, now seen corresponding path program 2 times [2021-11-19 05:20:52,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:52,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316565224] [2021-11-19 05:20:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:52,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:52,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-19 05:20:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:52,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:20:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:52,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:20:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:52,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:20:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:20:52,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:20:52,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316565224] [2021-11-19 05:20:52,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316565224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:20:52,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896780629] [2021-11-19 05:20:52,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:20:52,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:20:52,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:52,501 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:20:52,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-19 05:20:52,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:20:52,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:20:52,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:20:52,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:20:52,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:20:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:20:52,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896780629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:20:52,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:20:52,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2021-11-19 05:20:52,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373170880] [2021-11-19 05:20:52,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:20:52,798 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-19 05:20:52,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:52,799 INFO L85 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2021-11-19 05:20:52,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:52,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330165246] [2021-11-19 05:20:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:52,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:52,805 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:52,808 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:52,846 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:52,846 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:52,847 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:52,847 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:52,847 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-19 05:20:52,847 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:52,847 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:52,847 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:52,848 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2021-11-19 05:20:52,848 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:52,848 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:52,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:52,853 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:52,855 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:52,862 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:52,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:52,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:52,903 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:52,904 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-19 05:20:52,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:52,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:52,906 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:52,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:52,916 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:52,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-11-19 05:20:52,946 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:52,946 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:52,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2021-11-19 05:20:52,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:52,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:52,982 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:52,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-11-19 05:20:52,987 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:52,988 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:52,998 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:52,999 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:53,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:53,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:53,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:53,040 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:53,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-11-19 05:20:53,042 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:53,042 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:53,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Ended with exit code 0 [2021-11-19 05:20:53,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:53,080 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:53,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-11-19 05:20:53,086 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-19 05:20:53,086 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:53,216 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-19 05:20:53,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:53,224 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:53,224 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:53,224 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:53,224 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:53,224 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-19 05:20:53,225 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:53,225 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:53,225 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:53,225 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2021-11-19 05:20:53,225 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:53,225 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:53,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:53,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:53,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:53,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:53,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:53,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:53,292 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:53,292 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-19 05:20:53,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:53,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:53,294 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:53,302 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 [2021-11-19 05:20:53,314 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:53,314 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:53,314 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:53,315 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:53,315 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:53,316 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:53,316 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:53,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-11-19 05:20:53,333 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:53,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:53,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:53,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:53,370 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:53,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-11-19 05:20:53,372 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 [2021-11-19 05:20:53,381 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:53,381 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:53,382 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:53,382 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:53,382 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:53,382 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:53,382 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:53,410 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:20:53,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:53,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:53,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:53,460 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:53,463 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 [2021-11-19 05:20:53,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-11-19 05:20:53,472 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:20:53,473 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:20:53,473 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:20:53,473 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:20:53,473 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:20:53,474 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:20:53,474 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:20:53,486 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-19 05:20:53,489 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-19 05:20:53,489 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-19 05:20:53,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:53,491 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:53,498 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-19 05:20:53,498 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-19 05:20:53,498 INFO L513 LassoAnalysis]: Proved termination. [2021-11-19 05:20:53,498 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-11-19 05:20:53,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-11-19 05:20:53,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2021-11-19 05:20:53,534 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-19 05:20:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:53,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 05:20:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:53,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:20:54,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:20:54,192 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 [2021-11-19 05:20:54,192 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:20:54,302 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 349 states and 456 transitions. Complement of second has 14 states. [2021-11-19 05:20:54,302 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 [2021-11-19 05:20:54,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:20:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2021-11-19 05:20:54,308 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2021-11-19 05:20:54,308 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:54,308 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-19 05:20:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:54,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 05:20:54,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:54,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:20:54,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:20:54,868 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2021-11-19 05:20:54,868 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:20:54,948 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 349 states and 456 transitions. Complement of second has 14 states. [2021-11-19 05:20:54,949 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 [2021-11-19 05:20:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:20:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2021-11-19 05:20:54,951 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2021-11-19 05:20:54,951 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:54,951 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-19 05:20:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 05:20:55,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:20:55,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:20:55,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:20:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:20:55,456 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-11-19 05:20:55,456 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:20:55,563 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 486 states and 617 transitions. Complement of second has 16 states. [2021-11-19 05:20:55,563 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 [2021-11-19 05:20:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 05:20:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2021-11-19 05:20:55,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2021-11-19 05:20:55,565 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:55,566 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 36 letters. Loop has 3 letters. [2021-11-19 05:20:55,566 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:55,566 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 6 letters. [2021-11-19 05:20:55,567 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:20:55,567 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 486 states and 617 transitions. [2021-11-19 05:20:55,577 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2021-11-19 05:20:55,587 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 486 states to 396 states and 527 transitions. [2021-11-19 05:20:55,587 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 130 [2021-11-19 05:20:55,588 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2021-11-19 05:20:55,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 396 states and 527 transitions. [2021-11-19 05:20:55,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:20:55,588 INFO L681 BuchiCegarLoop]: Abstraction has 396 states and 527 transitions. [2021-11-19 05:20:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states and 527 transitions. [2021-11-19 05:20:55,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 352. [2021-11-19 05:20:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 196 states have (on average 1.1275510204081634) internal successors, (221), 212 states have internal predecessors, (221), 102 states have call successors, (104), 57 states have call predecessors, (104), 54 states have return successors, (132), 82 states have call predecessors, (132), 86 states have call successors, (132) [2021-11-19 05:20:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 457 transitions. [2021-11-19 05:20:55,608 INFO L704 BuchiCegarLoop]: Abstraction has 352 states and 457 transitions. [2021-11-19 05:20:55,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:20:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:20:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:20:55,610 INFO L87 Difference]: Start difference. First operand 352 states and 457 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:20:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:20:55,713 INFO L93 Difference]: Finished difference Result 379 states and 514 transitions. [2021-11-19 05:20:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:20:55,714 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 379 states and 514 transitions. [2021-11-19 05:20:55,722 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-11-19 05:20:55,725 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 379 states to 105 states and 143 transitions. [2021-11-19 05:20:55,725 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2021-11-19 05:20:55,726 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 99 [2021-11-19 05:20:55,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2021-11-19 05:20:55,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:20:55,727 INFO L681 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2021-11-19 05:20:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2021-11-19 05:20:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2021-11-19 05:20:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 54 states have internal predecessors, (57), 22 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2021-11-19 05:20:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2021-11-19 05:20:55,733 INFO L704 BuchiCegarLoop]: Abstraction has 87 states and 107 transitions. [2021-11-19 05:20:55,733 INFO L587 BuchiCegarLoop]: Abstraction has 87 states and 107 transitions. [2021-11-19 05:20:55,734 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-11-19 05:20:55,734 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 87 states and 107 transitions. [2021-11-19 05:20:55,735 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-11-19 05:20:55,735 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-19 05:20:55,735 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-19 05:20:55,736 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:20:55,736 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-19 05:20:55,736 INFO L791 eck$LassoCheckResult]: Stem: 6442#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6443#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 6441#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 6453#rec2ENTRY ~j := #in~j; 6504#L18 assume !(~j <= 0); 6501#L20 call #t~ret3 := rec1(~j - 1);< 6503#rec1ENTRY ~i := #in~i; 6502#L12 assume !(~i <= 0); 6471#L14 call #t~ret0 := rec1(~i - 2);< 6477#rec1ENTRY ~i := #in~i; 6474#L12 assume !(~i <= 0); 6470#L14 [2021-11-19 05:20:55,736 INFO L793 eck$LassoCheckResult]: Loop: 6470#L14 call #t~ret0 := rec1(~i - 2);< 6472#rec1ENTRY ~i := #in~i; 6474#L12 assume !(~i <= 0); 6470#L14 [2021-11-19 05:20:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:55,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1203085824, now seen corresponding path program 3 times [2021-11-19 05:20:55,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:55,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543904699] [2021-11-19 05:20:55,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:55,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:55,742 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:55,746 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash 55742, now seen corresponding path program 4 times [2021-11-19 05:20:55,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:55,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332749679] [2021-11-19 05:20:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:55,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:55,750 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:55,752 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:55,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:20:55,753 INFO L85 PathProgramCache]: Analyzing trace with hash 372328287, now seen corresponding path program 4 times [2021-11-19 05:20:55,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:20:55,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442980321] [2021-11-19 05:20:55,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:20:55,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:20:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:55,758 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:20:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:20:55,763 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:20:55,806 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:20:55,806 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:20:55,807 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:20:55,807 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:20:55,807 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-19 05:20:55,807 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:55,807 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:20:55,807 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:20:55,808 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2021-11-19 05:20:55,808 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:20:55,808 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:20:55,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:55,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:55,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:55,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:55,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:20:55,871 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:20:55,871 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-19 05:20:55,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:55,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:55,872 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:55,875 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:55,875 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:55,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-11-19 05:20:55,902 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:20:55,902 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:20:55,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:55,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:55,947 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:55,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:20:55,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:55,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-11-19 05:20:56,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-11-19 05:20:56,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:20:56,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:20:56,026 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:20:56,028 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-19 05:20:56,029 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:20:56,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-11-19 05:21:04,319 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-19 05:21:04,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:04,324 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:21:04,324 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:21:04,324 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:21:04,324 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:21:04,324 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-19 05:21:04,324 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:04,324 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:21:04,324 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:21:04,324 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2021-11-19 05:21:04,325 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:21:04,325 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:21:04,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:04,328 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:04,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:04,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:04,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:04,373 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:21:04,373 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-19 05:21:04,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:04,376 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:04,378 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 [2021-11-19 05:21:04,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-11-19 05:21:04,389 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:21:04,389 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:21:04,389 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:21:04,389 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:21:04,389 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:21:04,390 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:21:04,390 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:21:04,393 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:21:04,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:04,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:04,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:04,421 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:04,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-11-19 05:21:04,424 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 [2021-11-19 05:21:04,435 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:21:04,435 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:21:04,435 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:21:04,435 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:21:04,435 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:21:04,436 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:21:04,436 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:21:04,439 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-19 05:21:04,442 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-19 05:21:04,442 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-19 05:21:04,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:04,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:04,445 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:04,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-11-19 05:21:04,447 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-19 05:21:04,447 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-19 05:21:04,447 INFO L513 LassoAnalysis]: Proved termination. [2021-11-19 05:21:04,447 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2021-11-19 05:21:04,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Ended with exit code 0 [2021-11-19 05:21:04,473 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-19 05:21:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:21:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:21:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:21:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:21:04,590 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-11-19 05:21:04,590 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 87 states and 107 transitions. cyclomatic complexity: 23 Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:21:04,630 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 87 states and 107 transitions. cyclomatic complexity: 23. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 101 states and 125 transitions. Complement of second has 11 states. [2021-11-19 05:21:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-11-19 05:21:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:21:04,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2021-11-19 05:21:04,632 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 3 letters. [2021-11-19 05:21:04,633 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:21:04,633 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 14 letters. Loop has 3 letters. [2021-11-19 05:21:04,633 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:21:04,633 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 6 letters. [2021-11-19 05:21:04,634 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:21:04,634 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 125 transitions. [2021-11-19 05:21:04,637 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-11-19 05:21:04,639 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 95 states and 118 transitions. [2021-11-19 05:21:04,639 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 84 [2021-11-19 05:21:04,640 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2021-11-19 05:21:04,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 118 transitions. [2021-11-19 05:21:04,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:21:04,640 INFO L681 BuchiCegarLoop]: Abstraction has 95 states and 118 transitions. [2021-11-19 05:21:04,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states and 118 transitions. [2021-11-19 05:21:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-11-19 05:21:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 59 states have internal predecessors, (61), 23 states have call successors, (24), 16 states have call predecessors, (24), 15 states have return successors, (30), 17 states have call predecessors, (30), 21 states have call successors, (30) [2021-11-19 05:21:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2021-11-19 05:21:04,646 INFO L704 BuchiCegarLoop]: Abstraction has 93 states and 115 transitions. [2021-11-19 05:21:04,646 INFO L587 BuchiCegarLoop]: Abstraction has 93 states and 115 transitions. [2021-11-19 05:21:04,646 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-11-19 05:21:04,647 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 115 transitions. [2021-11-19 05:21:04,648 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-11-19 05:21:04,648 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-19 05:21:04,648 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-19 05:21:04,650 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:21:04,650 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-19 05:21:04,650 INFO L791 eck$LassoCheckResult]: Stem: 6703#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6704#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 6701#L25 call main_#t~ret6#1 := rec2(main_~x~0#1);< 6714#rec2ENTRY ~j := #in~j; 6732#L18 assume !(~j <= 0); 6733#L20 call #t~ret3 := rec1(~j - 1);< 6757#rec1ENTRY ~i := #in~i; 6758#L12 assume !(~i <= 0); 6726#L14 call #t~ret0 := rec1(~i - 2);< 6755#rec1ENTRY ~i := #in~i; 6791#L12 assume !(~i <= 0); 6725#L14 call #t~ret0 := rec1(~i - 2);< 6740#rec1ENTRY ~i := #in~i; 6741#L12 assume ~i <= 0;#res := 0; 6792#rec1FINAL assume true; 6760#rec1EXIT >#28#return; 6717#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6724#rec1ENTRY ~i := #in~i; 6788#L12 assume ~i <= 0;#res := 0; 6786#rec1FINAL assume true; 6729#rec1EXIT >#30#return; 6730#L14-2 call #t~ret2 := rec1(#t~ret1);< 6770#rec1ENTRY ~i := #in~i; 6774#L12 assume ~i <= 0;#res := 0; 6773#rec1FINAL assume true; 6768#rec1EXIT >#32#return; 6751#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6764#rec1FINAL assume true; 6749#rec1EXIT >#28#return; 6718#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6752#rec1ENTRY [2021-11-19 05:21:04,651 INFO L793 eck$LassoCheckResult]: Loop: 6752#rec1ENTRY ~i := #in~i; 6772#L12 assume !(~i <= 0); 6723#L14 call #t~ret0 := rec1(~i - 2);< 6765#rec1ENTRY ~i := #in~i; 6743#L12 assume !(~i <= 0); 6720#L14 call #t~ret0 := rec1(~i - 2);< 6742#rec1ENTRY ~i := #in~i; 6734#L12 assume ~i <= 0;#res := 0; 6727#rec1FINAL assume true; 6728#rec1EXIT >#28#return; 6717#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6724#rec1ENTRY ~i := #in~i; 6788#L12 assume ~i <= 0;#res := 0; 6786#rec1FINAL assume true; 6729#rec1EXIT >#30#return; 6730#L14-2 call #t~ret2 := rec1(#t~ret1);< 6770#rec1ENTRY ~i := #in~i; 6774#L12 assume ~i <= 0;#res := 0; 6773#rec1FINAL assume true; 6768#rec1EXIT >#32#return; 6751#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6764#rec1FINAL assume true; 6749#rec1EXIT >#28#return; 6719#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6752#rec1ENTRY [2021-11-19 05:21:04,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:21:04,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2021-11-19 05:21:04,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:21:04,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550323663] [2021-11-19 05:21:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:21:04,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:21:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:21:04,659 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:21:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:21:04,667 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:21:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:21:04,668 INFO L85 PathProgramCache]: Analyzing trace with hash 245881341, now seen corresponding path program 1 times [2021-11-19 05:21:04,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:21:04,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894600733] [2021-11-19 05:21:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:21:04,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:21:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:21:04,674 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:21:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:21:04,680 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:21:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:21:04,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2071488077, now seen corresponding path program 2 times [2021-11-19 05:21:04,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:21:04,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231794801] [2021-11-19 05:21:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:21:04,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:21:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:21:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:21:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:21:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:21:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:21:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:21:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:21:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:21:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 05:21:04,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:21:04,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231794801] [2021-11-19 05:21:04,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231794801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:21:04,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771405745] [2021-11-19 05:21:04,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:21:04,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:21:04,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:04,787 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:21:04,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-19 05:21:04,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:21:04,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:21:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 05:21:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 05:21:04,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:21:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-19 05:21:05,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771405745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:21:05,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:21:05,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2021-11-19 05:21:05,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719785361] [2021-11-19 05:21:05,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:21:05,503 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:21:05,503 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:21:05,504 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:21:05,504 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:21:05,504 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-19 05:21:05,504 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,504 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:21:05,504 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:21:05,504 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2021-11-19 05:21:05,504 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:21:05,504 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:21:05,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,517 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,522 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,568 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:21:05,568 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-19 05:21:05,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:05,571 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:05,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-11-19 05:21:05,576 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:21:05,576 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:21:05,585 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:21:05,586 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:21:05,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:05,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:05,612 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:05,635 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:21:05,635 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:21:05,656 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:21:05,656 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:21:05,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-11-19 05:21:05,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:05,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:05,698 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:05,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:05,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-11-19 05:21:05,701 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:21:05,701 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:21:05,711 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:21:05,711 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:21:05,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2021-11-19 05:21:05,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:05,736 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:05,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-11-19 05:21:05,738 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:21:05,738 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:21:05,748 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:21:05,748 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:21:05,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2021-11-19 05:21:05,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:05,773 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:05,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-11-19 05:21:05,775 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:21:05,775 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:21:05,784 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-19 05:21:05,785 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-19 05:21:05,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:05,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:05,810 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:05,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-11-19 05:21:05,812 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-19 05:21:05,812 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:21:05,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2021-11-19 05:21:05,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:05,848 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:05,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-11-19 05:21:05,858 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-19 05:21:05,858 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-19 05:21:05,869 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-19 05:21:05,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Ended with exit code 0 [2021-11-19 05:21:05,894 INFO L210 LassoAnalysis]: Preferences: [2021-11-19 05:21:05,894 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-19 05:21:05,894 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-19 05:21:05,894 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-19 05:21:05,894 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-19 05:21:05,894 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,894 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-19 05:21:05,894 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-19 05:21:05,894 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2021-11-19 05:21:05,894 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-19 05:21:05,894 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-19 05:21:05,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,906 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,908 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-19 05:21:05,941 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-19 05:21:05,941 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-19 05:21:05,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:05,958 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:05,960 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 [2021-11-19 05:21:05,970 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:21:05,970 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:21:05,971 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:21:05,971 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:21:05,971 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:21:05,971 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:21:05,971 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:21:05,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2021-11-19 05:21:05,973 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:21:05,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Ended with exit code 0 [2021-11-19 05:21:05,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:05,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:05,998 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:05,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2021-11-19 05:21:06,000 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 [2021-11-19 05:21:06,008 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:21:06,008 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:21:06,008 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:21:06,009 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:21:06,009 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:21:06,009 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:21:06,009 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:21:06,010 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:21:06,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:06,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:06,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:06,035 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:06,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Waiting until timeout for monitored process [2021-11-19 05:21:06,043 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 [2021-11-19 05:21:06,051 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:21:06,051 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:21:06,052 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:21:06,052 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:21:06,052 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:21:06,052 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:21:06,052 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:21:06,055 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:21:06,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:06,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:06,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:06,081 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:06,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2021-11-19 05:21:06,083 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 [2021-11-19 05:21:06,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:21:06,092 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:21:06,092 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:21:06,092 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:21:06,092 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:21:06,092 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:21:06,092 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:21:06,094 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-19 05:21:06,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Ended with exit code 0 [2021-11-19 05:21:06,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:06,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:06,119 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:06,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2021-11-19 05:21:06,120 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 [2021-11-19 05:21:06,128 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-19 05:21:06,129 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-19 05:21:06,129 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-19 05:21:06,129 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-19 05:21:06,129 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-19 05:21:06,130 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-19 05:21:06,130 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-19 05:21:06,157 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-19 05:21:06,164 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-19 05:21:06,164 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-19 05:21:06,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-19 05:21:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:21:06,170 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-19 05:21:06,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2021-11-19 05:21:06,172 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-19 05:21:06,172 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-19 05:21:06,172 INFO L513 LassoAnalysis]: Proved termination. [2021-11-19 05:21:06,173 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-11-19 05:21:06,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:06,197 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-19 05:21:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:21:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:06,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:21:06,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:06,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 05:21:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:21:06,995 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2021-11-19 05:21:06,996 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:21:07,069 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 101 states and 123 transitions. Complement of second has 7 states. [2021-11-19 05:21:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-19 05:21:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:21:07,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2021-11-19 05:21:07,071 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2021-11-19 05:21:07,072 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:21:07,072 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-19 05:21:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:21:07,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:07,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:21:07,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:07,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 05:21:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:07,825 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:21:07,826 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2021-11-19 05:21:07,826 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:21:07,913 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 101 states and 123 transitions. Complement of second has 7 states. [2021-11-19 05:21:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2021-11-19 05:21:07,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:21:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2021-11-19 05:21:07,915 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2021-11-19 05:21:07,916 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:21:07,917 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-19 05:21:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:21:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:21:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:08,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 05:21:08,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:21:08,705 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2021-11-19 05:21:08,705 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:21:09,059 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 258 states and 304 transitions. Complement of second has 31 states. [2021-11-19 05:21:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2021-11-19 05:21:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:21:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 39 transitions. [2021-11-19 05:21:09,060 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 39 transitions. Stem has 30 letters. Loop has 24 letters. [2021-11-19 05:21:09,061 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:21:09,061 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-19 05:21:09,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:21:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:09,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:21:09,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:21:09,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 05:21:09,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:21:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 05:21:09,869 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2021-11-19 05:21:09,869 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:21:10,452 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 410 states and 516 transitions. Complement of second has 80 states. [2021-11-19 05:21:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2021-11-19 05:21:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 05:21:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 50 transitions. [2021-11-19 05:21:10,455 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 24 letters. [2021-11-19 05:21:10,456 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:21:10,456 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 54 letters. Loop has 24 letters. [2021-11-19 05:21:10,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:21:10,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 48 letters. [2021-11-19 05:21:10,458 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-19 05:21:10,458 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 410 states and 516 transitions. [2021-11-19 05:21:10,467 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2021-11-19 05:21:10,473 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 410 states to 254 states and 346 transitions. [2021-11-19 05:21:10,473 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2021-11-19 05:21:10,474 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 165 [2021-11-19 05:21:10,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 254 states and 346 transitions. [2021-11-19 05:21:10,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-19 05:21:10,475 INFO L681 BuchiCegarLoop]: Abstraction has 254 states and 346 transitions. [2021-11-19 05:21:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states and 346 transitions. [2021-11-19 05:21:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2021-11-19 05:21:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 127 states have (on average 1.125984251968504) internal successors, (143), 139 states have internal predecessors, (143), 51 states have call successors, (52), 34 states have call predecessors, (52), 39 states have return successors, (76), 43 states have call predecessors, (76), 49 states have call successors, (76) [2021-11-19 05:21:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-11-19 05:21:10,489 INFO L704 BuchiCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-11-19 05:21:10,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:21:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:21:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:21:10,490 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 05:21:10,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:21:10,539 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-19 05:21:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:21:10,540 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 38 transitions. [2021-11-19 05:21:10,541 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-19 05:21:10,541 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 0 states and 0 transitions. [2021-11-19 05:21:10,541 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-11-19 05:21:10,542 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-11-19 05:21:10,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-11-19 05:21:10,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-19 05:21:10,542 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 05:21:10,542 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 05:21:10,542 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 05:21:10,542 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-11-19 05:21:10,543 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-11-19 05:21:10,543 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-19 05:21:10,543 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-11-19 05:21:10,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 05:21:10 BoogieIcfgContainer [2021-11-19 05:21:10,552 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-19 05:21:10,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 05:21:10,552 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 05:21:10,553 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 05:21:10,553 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:20:37" (3/4) ... [2021-11-19 05:21:10,557 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 05:21:10,557 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 05:21:10,558 INFO L158 Benchmark]: Toolchain (without parser) took 33999.82ms. Allocated memory was 98.6MB in the beginning and 144.7MB in the end (delta: 46.1MB). Free memory was 67.1MB in the beginning and 41.0MB in the end (delta: 26.1MB). Peak memory consumption was 72.6MB. Max. memory is 16.1GB. [2021-11-19 05:21:10,558 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 98.6MB. Free memory was 50.2MB in the beginning and 50.2MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:21:10,559 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.14ms. Allocated memory is still 98.6MB. Free memory was 66.9MB in the beginning and 75.1MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 05:21:10,559 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.79ms. Allocated memory is still 98.6MB. Free memory was 75.1MB in the beginning and 74.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:21:10,560 INFO L158 Benchmark]: Boogie Preprocessor took 26.64ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 73.0MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 05:21:10,560 INFO L158 Benchmark]: RCFGBuilder took 398.40ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 64.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 05:21:10,561 INFO L158 Benchmark]: BuchiAutomizer took 33225.65ms. Allocated memory was 98.6MB in the beginning and 144.7MB in the end (delta: 46.1MB). Free memory was 64.3MB in the beginning and 41.0MB in the end (delta: 23.3MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. [2021-11-19 05:21:10,561 INFO L158 Benchmark]: Witness Printer took 4.89ms. Allocated memory is still 144.7MB. Free memory is still 41.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:21:10,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 98.6MB. Free memory was 50.2MB in the beginning and 50.2MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 290.14ms. Allocated memory is still 98.6MB. Free memory was 66.9MB in the beginning and 75.1MB in the end (delta: -8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.79ms. Allocated memory is still 98.6MB. Free memory was 75.1MB in the beginning and 74.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.64ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 73.0MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 398.40ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 64.6MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 33225.65ms. Allocated memory was 98.6MB in the beginning and 144.7MB in the end (delta: 46.1MB). Free memory was 64.3MB in the beginning and 41.0MB in the end (delta: 23.3MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. * Witness Printer took 4.89ms. Allocated memory is still 144.7MB. Free memory is still 41.0MB. 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 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6efe6325 and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 33.1s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 22.2s. Construction of modules took 1.1s. Büchi inclusion checks took 9.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 315 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 364 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 337 mSDsluCounter, 888 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 583 mSDsCounter, 309 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1011 IncrementalHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 309 mSolverCounterUnsat, 305 mSDtfsCounter, 1011 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf97 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq154 hnf92 smp100 dnf100 smp100 tf111 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 63ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 14.9s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-11-19 05:21:10,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:10,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-19 05:21:11,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:11,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-19 05:21:11,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a286a9f5-8317-4ac0-8bab-6841deb99d38/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE