./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY --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 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:38:51,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:38:51,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:38:51,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:38:51,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:38:51,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:38:51,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:38:51,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:38:51,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:38:51,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:38:51,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:38:51,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:38:51,268 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:38:51,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:38:51,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:38:51,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:38:51,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:38:51,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:38:51,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:38:51,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:38:51,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:38:51,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:38:51,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:38:51,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:38:51,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:38:51,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:38:51,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:38:51,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:38:51,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:38:51,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:38:51,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:38:51,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:38:51,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:38:51,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:38:51,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:38:51,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:38:51,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:38:51,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:38:51,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:38:51,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:38:51,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:38:51,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-07 07:38:51,394 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:38:51,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:38:51,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:38:51,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:38:51,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:38:51,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:38:51,405 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:38:51,405 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-07 07:38:51,405 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-07 07:38:51,406 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-07 07:38:51,407 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-07 07:38:51,407 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-07 07:38:51,408 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-07 07:38:51,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:38:51,408 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:38:51,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:38:51,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:38:51,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-07 07:38:51,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-07 07:38:51,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-07 07:38:51,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:38:51,410 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-07 07:38:51,410 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:38:51,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-07 07:38:51,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:38:51,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:38:51,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:38:51,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:38:51,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:38:51,415 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-07 07:38:51,415 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_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b [2021-11-07 07:38:51,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:38:51,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:38:51,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:38:51,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:38:51,773 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:38:51,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2021-11-07 07:38:51,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/data/e29b63760/bfd3e4ba400b4b74b61ab42bac90c558/FLAG465918d44 [2021-11-07 07:38:52,385 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:38:52,387 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2021-11-07 07:38:52,394 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/data/e29b63760/bfd3e4ba400b4b74b61ab42bac90c558/FLAG465918d44 [2021-11-07 07:38:52,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/data/e29b63760/bfd3e4ba400b4b74b61ab42bac90c558 [2021-11-07 07:38:52,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:38:52,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:38:52,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:38:52,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:38:52,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:38:52,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:38:52" (1/1) ... [2021-11-07 07:38:52,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557c6121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:52, skipping insertion in model container [2021-11-07 07:38:52,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:38:52" (1/1) ... [2021-11-07 07:38:52,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:38:52,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:38:53,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:38:53,023 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:38:53,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:38:53,061 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:38:53,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53 WrapperNode [2021-11-07 07:38:53,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:38:53,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:38:53,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:38:53,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:38:53,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:38:53,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:38:53,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:38:53,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:38:53,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:38:53,127 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:38:53,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:38:53,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:38:53,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (1/1) ... [2021-11-07 07:38:53,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:53,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:53,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:53,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-07 07:38:53,234 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-11-07 07:38:53,234 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-11-07 07:38:53,235 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-11-07 07:38:53,235 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-11-07 07:38:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:38:53,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:38:53,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:38:53,414 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 07:38:53,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:53 BoogieIcfgContainer [2021-11-07 07:38:53,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:38:53,418 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-07 07:38:53,418 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-07 07:38:53,422 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-07 07:38:53,424 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-07 07:38:53,424 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.11 07:38:52" (1/3) ... [2021-11-07 07:38:53,425 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4a39961f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.11 07:38:53, skipping insertion in model container [2021-11-07 07:38:53,426 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-07 07:38:53,426 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:38:53" (2/3) ... [2021-11-07 07:38:53,427 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4a39961f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.11 07:38:53, skipping insertion in model container [2021-11-07 07:38:53,427 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-07 07:38:53,427 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:53" (3/3) ... [2021-11-07 07:38:53,429 INFO L389 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d.c [2021-11-07 07:38:53,496 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-07 07:38:53,497 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-07 07:38:53,497 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-07 07:38:53,497 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-07 07:38:53,497 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-07 07:38:53,497 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-07 07:38:53,497 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-07 07:38:53,498 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-07 07:38:53,516 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-11-07 07:38:53,553 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:38:53,554 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-07 07:38:53,554 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-07 07:38:53,565 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-07 07:38:53,566 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:53,566 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-07 07:38:53,567 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2021-11-07 07:38:53,574 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:38:53,574 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-07 07:38:53,574 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-07 07:38:53,574 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-07 07:38:53,576 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:53,583 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 10#L25true call main_#t~ret6 := rec2(main_~x~0);< 16#rec2ENTRYtrue [2021-11-07 07:38:53,584 INFO L793 eck$LassoCheckResult]: Loop: 16#rec2ENTRYtrue ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j);< 22#rec1ENTRYtrue ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 14#rec1FINALtrue assume true; 15#rec1EXITtrue >#33#return; 4#L20-1true call #t~ret4 := rec2(#t~ret3 - 1);< 16#rec2ENTRYtrue [2021-11-07 07:38:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:53,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2021-11-07 07:38:53,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:53,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905259181] [2021-11-07 07:38:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:53,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:53,673 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:53,697 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2021-11-07 07:38:53,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:53,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645819274] [2021-11-07 07:38:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:53,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:53,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:38:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:53,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:53,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645819274] [2021-11-07 07:38:53,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645819274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:53,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:53,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:38:53,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283998699] [2021-11-07 07:38:53,848 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-11-07 07:38:53,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:53,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:38:53,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:38:53,870 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:38:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:53,969 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-11-07 07:38:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:38:53,972 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 33 transitions. [2021-11-07 07:38:53,976 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:38:53,984 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 16 states and 22 transitions. [2021-11-07 07:38:53,985 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2021-11-07 07:38:53,986 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-11-07 07:38:53,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2021-11-07 07:38:53,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:38:53,989 INFO L681 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-11-07 07:38:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2021-11-07 07:38:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-07 07:38:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-07 07:38:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-11-07 07:38:54,027 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-11-07 07:38:54,027 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-11-07 07:38:54,027 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-07 07:38:54,028 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2021-11-07 07:38:54,029 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:38:54,029 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-07 07:38:54,030 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-07 07:38:54,031 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-07 07:38:54,031 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:54,032 INFO L791 eck$LassoCheckResult]: Stem: 66#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 64#L25 call main_#t~ret6 := rec2(main_~x~0);< 65#rec2ENTRY [2021-11-07 07:38:54,032 INFO L793 eck$LassoCheckResult]: Loop: 65#rec2ENTRY ~j := #in~j; 76#L18 assume !(~j <= 0); 68#L20 call #t~ret3 := rec1(~j);< 73#rec1ENTRY ~i := #in~i; 77#L12 assume !(~i <= 0); 69#L14 call #t~ret0 := rec1(~i - 2);< 73#rec1ENTRY ~i := #in~i; 77#L12 assume ~i <= 0;#res := 0; 74#rec1FINAL assume true; 75#rec1EXIT >#27#return; 70#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 73#rec1ENTRY ~i := #in~i; 77#L12 assume ~i <= 0;#res := 0; 74#rec1FINAL assume true; 75#rec1EXIT >#29#return; 71#L14-2 call #t~ret2 := rec1(#t~ret1);< 73#rec1ENTRY ~i := #in~i; 77#L12 assume ~i <= 0;#res := 0; 74#rec1FINAL assume true; 75#rec1EXIT >#31#return; 67#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 72#rec1FINAL assume true; 78#rec1EXIT >#33#return; 63#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 65#rec2ENTRY [2021-11-07 07:38:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:54,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 2 times [2021-11-07 07:38:54,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:54,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300884726] [2021-11-07 07:38:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:54,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:54,041 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:54,046 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash -616266826, now seen corresponding path program 1 times [2021-11-07 07:38:54,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:54,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757944178] [2021-11-07 07:38:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:54,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:54,075 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:54,106 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:54,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:54,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1277860358, now seen corresponding path program 1 times [2021-11-07 07:38:54,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:54,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603199200] [2021-11-07 07:38:54,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:54,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:54,157 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:54,228 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:54,968 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:38:54,968 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:38:54,969 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:38:54,969 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:38:54,970 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-07 07:38:54,970 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:54,970 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:38:54,970 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:38:55,000 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2021-11-07 07:38:55,001 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:38:55,001 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:38:55,039 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,075 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,149 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:38:55,150 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-07 07:38:55,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,168 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:55,169 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:55,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-07 07:38:55,205 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:55,205 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:55,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:55,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-07 07:38:55,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:55,267 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:55,281 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:55,281 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:55,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-11-07 07:38:55,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-07 07:38:55,331 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:55,332 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:55,363 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:55,364 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:55,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:55,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,399 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-07 07:38:55,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:55,403 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:55,438 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:55,438 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:55,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:55,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,473 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,491 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:55,492 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:55,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-07 07:38:55,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:55,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,552 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-07 07:38:55,555 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-07 07:38:55,555 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:55,578 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-07 07:38:55,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:55,623 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:38:55,623 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:38:55,623 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:38:55,623 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:38:55,624 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-07 07:38:55,624 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,624 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:38:55,624 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:38:55,624 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2021-11-07 07:38:55,624 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:38:55,624 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:38:55,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:55,683 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:38:55,688 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-07 07:38:55,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,691 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-07 07:38:55,697 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 [2021-11-07 07:38:55,710 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:55,711 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:55,711 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:55,712 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:55,712 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:55,714 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:55,714 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:55,731 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:38:55,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:55,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-07 07:38:55,779 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 [2021-11-07 07:38:55,791 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:55,791 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:55,791 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:55,791 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:55,792 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:55,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:55,793 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:55,814 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:38:55,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:55,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,859 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,866 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 [2021-11-07 07:38:55,881 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:55,881 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:55,881 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:55,881 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:55,882 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:55,884 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:55,884 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:55,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-07 07:38:55,898 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:38:55,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:55,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:55,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-07 07:38:55,942 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 [2021-11-07 07:38:55,951 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:55,951 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:55,951 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:55,951 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:55,951 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:55,953 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:55,953 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:55,982 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-07 07:38:55,989 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-07 07:38:55,989 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-07 07:38:55,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:55,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:55,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:56,000 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-07 07:38:56,000 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-07 07:38:56,000 INFO L513 LassoAnalysis]: Proved termination. [2021-11-07 07:38:56,001 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2021-11-07 07:38:56,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-07 07:38:56,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:56,049 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-07 07:38:56,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:56,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:38:56,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:56,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:38:56,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 07:38:56,566 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2021-11-07 07:38:56,567 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8 Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:38:57,052 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Result 101 states and 147 transitions. Complement of second has 42 states. [2021-11-07 07:38:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2021-11-07 07:38:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:38:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2021-11-07 07:38:57,059 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 24 letters. [2021-11-07 07:38:57,061 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:38:57,061 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 26 letters. Loop has 24 letters. [2021-11-07 07:38:57,062 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:38:57,062 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 48 letters. [2021-11-07 07:38:57,063 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:38:57,063 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 147 transitions. [2021-11-07 07:38:57,072 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:38:57,079 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 89 states and 135 transitions. [2021-11-07 07:38:57,079 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2021-11-07 07:38:57,080 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2021-11-07 07:38:57,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 135 transitions. [2021-11-07 07:38:57,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-07 07:38:57,082 INFO L681 BuchiCegarLoop]: Abstraction has 89 states and 135 transitions. [2021-11-07 07:38:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states and 135 transitions. [2021-11-07 07:38:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2021-11-07 07:38:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (41), 18 states have call predecessors, (41), 16 states have call successors, (41) [2021-11-07 07:38:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 98 transitions. [2021-11-07 07:38:57,102 INFO L704 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2021-11-07 07:38:57,102 INFO L587 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2021-11-07 07:38:57,102 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-07 07:38:57,102 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 98 transitions. [2021-11-07 07:38:57,105 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:38:57,105 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-07 07:38:57,105 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-07 07:38:57,106 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:57,106 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-07 07:38:57,106 INFO L791 eck$LassoCheckResult]: Stem: 343#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 340#L25 call main_#t~ret6 := rec2(main_~x~0);< 362#rec2ENTRY ~j := #in~j; 373#L18 assume !(~j <= 0); 370#L20 call #t~ret3 := rec1(~j);< 382#rec1ENTRY ~i := #in~i; 374#L12 assume !(~i <= 0); 347#L14 call #t~ret0 := rec1(~i - 2);< 363#rec1ENTRY [2021-11-07 07:38:57,106 INFO L793 eck$LassoCheckResult]: Loop: 363#rec1ENTRY ~i := #in~i; 376#L12 assume !(~i <= 0); 345#L14 call #t~ret0 := rec1(~i - 2);< 363#rec1ENTRY [2021-11-07 07:38:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:57,107 INFO L85 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2021-11-07 07:38:57,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:57,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607191954] [2021-11-07 07:38:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:57,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:57,116 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:57,123 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:57,124 INFO L85 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2021-11-07 07:38:57,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:57,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468159465] [2021-11-07 07:38:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:57,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:57,130 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:57,134 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2021-11-07 07:38:57,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:57,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365060988] [2021-11-07 07:38:57,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:57,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:57,151 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:57,173 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:57,274 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:38:57,274 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:38:57,274 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:38:57,274 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:38:57,274 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-07 07:38:57,274 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:57,274 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:38:57,275 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:38:57,275 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2021-11-07 07:38:57,275 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:38:57,275 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:38:57,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:57,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,350 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:38:57,351 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-07 07:38:57,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:57,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:57,360 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:57,372 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:57,372 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:57,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-07 07:38:57,403 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:57,403 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:57,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:57,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:57,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:57,450 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:57,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:57,456 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:57,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-07 07:38:57,478 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:57,479 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:57,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:57,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:57,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:57,523 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:57,529 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:57,530 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:57,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-07 07:38:57,551 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:57,551 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:57,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:57,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:57,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:57,594 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:57,602 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:57,602 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:57,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-11-07 07:38:57,623 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:57,623 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:57,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:57,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:57,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:57,663 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:57,670 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:57,670 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:57,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-11-07 07:38:57,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:57,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:57,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:57,734 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:57,741 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-07 07:38:57,741 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:57,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-11-07 07:38:57,875 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-07 07:38:57,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:57,882 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:38:57,883 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:38:57,883 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:38:57,883 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:38:57,883 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-07 07:38:57,883 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:57,883 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:38:57,883 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:38:57,883 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2021-11-07 07:38:57,883 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:38:57,884 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:38:57,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,889 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,892 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,899 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,901 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:57,934 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:38:57,934 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-07 07:38:57,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:57,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:57,936 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:57,948 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 [2021-11-07 07:38:57,960 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:57,960 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:57,960 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:57,961 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:57,961 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:57,962 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:57,962 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:57,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-11-07 07:38:57,982 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:38:58,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:58,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:58,023 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:58,037 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 [2021-11-07 07:38:58,049 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:58,049 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:58,049 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:58,049 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:58,049 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:58,052 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:58,052 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:58,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-11-07 07:38:58,066 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:38:58,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:58,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:58,103 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:58,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-11-07 07:38:58,109 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 [2021-11-07 07:38:58,121 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:58,121 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:58,121 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:58,121 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:58,121 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:58,122 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:58,122 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:58,138 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:38:58,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:58,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:58,175 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:58,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-11-07 07:38:58,183 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 [2021-11-07 07:38:58,191 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:58,192 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:58,192 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:58,192 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:58,192 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:58,193 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:58,193 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:58,198 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-07 07:38:58,200 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-07 07:38:58,201 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-07 07:38:58,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:58,202 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:58,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-11-07 07:38:58,203 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-07 07:38:58,203 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-07 07:38:58,204 INFO L513 LassoAnalysis]: Proved termination. [2021-11-07 07:38:58,204 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-11-07 07:38:58,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:58,231 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-07 07:38:58,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:38:58,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:58,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:38:58,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:58,401 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 [2021-11-07 07:38:58,401 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40 Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-07 07:38:58,459 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 108 states and 165 transitions. Complement of second has 13 states. [2021-11-07 07:38:58,460 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 [2021-11-07 07:38:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-07 07:38:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2021-11-07 07:38:58,461 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 3 letters. [2021-11-07 07:38:58,461 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:38:58,461 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 11 letters. Loop has 3 letters. [2021-11-07 07:38:58,462 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:38:58,462 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 6 letters. [2021-11-07 07:38:58,462 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:38:58,462 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 165 transitions. [2021-11-07 07:38:58,468 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:38:58,473 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 96 states and 153 transitions. [2021-11-07 07:38:58,474 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2021-11-07 07:38:58,474 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2021-11-07 07:38:58,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 153 transitions. [2021-11-07 07:38:58,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-07 07:38:58,475 INFO L681 BuchiCegarLoop]: Abstraction has 96 states and 153 transitions. [2021-11-07 07:38:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 153 transitions. [2021-11-07 07:38:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-11-07 07:38:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 59 states have internal predecessors, (61), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (56), 18 states have call predecessors, (56), 22 states have call successors, (56) [2021-11-07 07:38:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 143 transitions. [2021-11-07 07:38:58,491 INFO L704 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2021-11-07 07:38:58,492 INFO L587 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2021-11-07 07:38:58,492 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-07 07:38:58,492 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 143 transitions. [2021-11-07 07:38:58,494 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:38:58,495 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-07 07:38:58,495 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-07 07:38:58,496 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:58,496 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-07 07:38:58,496 INFO L791 eck$LassoCheckResult]: Stem: 579#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 575#L25 call main_#t~ret6 := rec2(main_~x~0);< 588#rec2ENTRY ~j := #in~j; 653#L18 assume !(~j <= 0); 581#L20 call #t~ret3 := rec1(~j);< 661#rec1ENTRY ~i := #in~i; 660#L12 assume !(~i <= 0); 619#L14 call #t~ret0 := rec1(~i - 2);< 659#rec1ENTRY ~i := #in~i; 663#L12 assume ~i <= 0;#res := 0; 658#rec1FINAL assume true; 651#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 590#rec1ENTRY [2021-11-07 07:38:58,496 INFO L793 eck$LassoCheckResult]: Loop: 590#rec1ENTRY ~i := #in~i; 662#L12 assume !(~i <= 0); 607#L14 call #t~ret0 := rec1(~i - 2);< 590#rec1ENTRY [2021-11-07 07:38:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:58,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2021-11-07 07:38:58,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:58,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350796001] [2021-11-07 07:38:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:58,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:58,522 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:58,530 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2021-11-07 07:38:58,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:58,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609171702] [2021-11-07 07:38:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:58,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:58,555 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:58,561 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2021-11-07 07:38:58,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:58,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340394956] [2021-11-07 07:38:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:58,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:58,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:58,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 07:38:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:38:58,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:58,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340394956] [2021-11-07 07:38:58,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340394956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:38:58,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:38:58,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 07:38:58,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885141311] [2021-11-07 07:38:58,706 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:38:58,707 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:38:58,707 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:38:58,707 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:38:58,707 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-07 07:38:58,707 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,708 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:38:58,708 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:38:58,708 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2021-11-07 07:38:58,708 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:38:58,708 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:38:58,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:58,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:58,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:58,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:58,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:58,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:58,756 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:38:58,757 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-07 07:38:58,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:58,759 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:58,768 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:58,768 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:58,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-11-07 07:38:58,779 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:58,780 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:58,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-11-07 07:38:58,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:58,807 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:58,839 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:58,839 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:58,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-11-07 07:38:58,867 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:58,867 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:58,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:58,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:58,905 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:58,907 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:58,907 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:58,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-11-07 07:38:58,918 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:38:58,918 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:38:58,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:58,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:58,940 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:58,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-11-07 07:38:58,941 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:38:58,942 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:58,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:58,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:58,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:58,975 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:58,978 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-07 07:38:58,978 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:38:58,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-11-07 07:38:59,059 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-07 07:38:59,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-11-07 07:38:59,063 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:38:59,063 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:38:59,063 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:38:59,063 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:38:59,063 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-07 07:38:59,063 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:59,063 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:38:59,063 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:38:59,063 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2021-11-07 07:38:59,063 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:38:59,063 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:38:59,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:59,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:59,083 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:59,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:59,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:59,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:38:59,126 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:38:59,126 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-07 07:38:59,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:59,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:59,128 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:59,150 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 [2021-11-07 07:38:59,162 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:59,162 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:59,162 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:59,162 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:59,162 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:59,165 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:59,165 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:59,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-11-07 07:38:59,178 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:38:59,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:59,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:59,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:59,222 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:59,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-11-07 07:38:59,224 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 [2021-11-07 07:38:59,233 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:59,233 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:59,233 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:59,233 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:59,233 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:59,234 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:59,234 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:59,246 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:38:59,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-11-07 07:38:59,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:59,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:59,271 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:59,272 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 [2021-11-07 07:38:59,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-11-07 07:38:59,281 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:38:59,281 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:38:59,281 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:38:59,281 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:38:59,281 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:38:59,282 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:38:59,282 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:38:59,286 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-07 07:38:59,288 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-07 07:38:59,288 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-07 07:38:59,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:38:59,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:59,295 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:38:59,299 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-07 07:38:59,299 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-07 07:38:59,299 INFO L513 LassoAnalysis]: Proved termination. [2021-11-07 07:38:59,299 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-11-07 07:38:59,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-11-07 07:38:59,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:59,324 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-07 07:38:59,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:59,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:38:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:38:59,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:38:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:38:59,567 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 [2021-11-07 07:38:59,567 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-07 07:38:59,661 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 132 states and 207 transitions. Complement of second has 14 states. [2021-11-07 07:38:59,662 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 [2021-11-07 07:38:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-07 07:38:59,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2021-11-07 07:38:59,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 3 letters. [2021-11-07 07:38:59,663 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:38:59,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 16 letters. Loop has 3 letters. [2021-11-07 07:38:59,663 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:38:59,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 6 letters. [2021-11-07 07:38:59,664 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:38:59,664 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 132 states and 207 transitions. [2021-11-07 07:38:59,668 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:38:59,674 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 132 states to 120 states and 195 transitions. [2021-11-07 07:38:59,674 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2021-11-07 07:38:59,675 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2021-11-07 07:38:59,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 195 transitions. [2021-11-07 07:38:59,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-07 07:38:59,675 INFO L681 BuchiCegarLoop]: Abstraction has 120 states and 195 transitions. [2021-11-07 07:38:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states and 195 transitions. [2021-11-07 07:38:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2021-11-07 07:38:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 75 states have internal predecessors, (79), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (74), 22 states have call predecessors, (74), 28 states have call successors, (74) [2021-11-07 07:38:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 185 transitions. [2021-11-07 07:38:59,712 INFO L704 BuchiCegarLoop]: Abstraction has 116 states and 185 transitions. [2021-11-07 07:38:59,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:38:59,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:38:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:38:59,713 INFO L87 Difference]: Start difference. First operand 116 states and 185 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-11-07 07:38:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:38:59,759 INFO L93 Difference]: Finished difference Result 129 states and 195 transitions. [2021-11-07 07:38:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:38:59,759 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 129 states and 195 transitions. [2021-11-07 07:38:59,763 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2021-11-07 07:38:59,781 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 129 states to 127 states and 193 transitions. [2021-11-07 07:38:59,781 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2021-11-07 07:38:59,782 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2021-11-07 07:38:59,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 193 transitions. [2021-11-07 07:38:59,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-07 07:38:59,782 INFO L681 BuchiCegarLoop]: Abstraction has 127 states and 193 transitions. [2021-11-07 07:38:59,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 193 transitions. [2021-11-07 07:38:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2021-11-07 07:38:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 65 states have internal predecessors, (67), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (60), 22 states have call predecessors, (60), 26 states have call successors, (60) [2021-11-07 07:38:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 157 transitions. [2021-11-07 07:38:59,800 INFO L704 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2021-11-07 07:38:59,800 INFO L587 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2021-11-07 07:38:59,800 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-11-07 07:38:59,800 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 104 states and 157 transitions. [2021-11-07 07:38:59,802 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-11-07 07:38:59,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:59,822 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-07 07:38:59,822 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-07 07:38:59,823 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:59,824 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:38:59,824 INFO L791 eck$LassoCheckResult]: Stem: 1145#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1141#L25 call main_#t~ret6 := rec2(main_~x~0);< 1168#rec2ENTRY ~j := #in~j; 1207#L18 assume !(~j <= 0); 1169#L20 call #t~ret3 := rec1(~j);< 1206#rec1ENTRY ~i := #in~i; 1205#L12 assume !(~i <= 0); 1152#L14 call #t~ret0 := rec1(~i - 2);< 1203#rec1ENTRY ~i := #in~i; 1201#L12 assume !(~i <= 0); 1149#L14 call #t~ret0 := rec1(~i - 2);< 1200#rec1ENTRY ~i := #in~i; 1202#L12 assume ~i <= 0;#res := 0; 1241#rec1FINAL assume true; 1240#rec1EXIT >#27#return; 1173#L14-1 [2021-11-07 07:38:59,824 INFO L793 eck$LassoCheckResult]: Loop: 1173#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1174#rec1ENTRY ~i := #in~i; 1189#L12 assume ~i <= 0;#res := 0; 1177#rec1FINAL assume true; 1179#rec1EXIT >#29#return; 1150#L14-2 call #t~ret2 := rec1(#t~ret1);< 1171#rec1ENTRY ~i := #in~i; 1215#L12 assume !(~i <= 0); 1153#L14 call #t~ret0 := rec1(~i - 2);< 1171#rec1ENTRY ~i := #in~i; 1215#L12 assume ~i <= 0;#res := 0; 1235#rec1FINAL assume true; 1234#rec1EXIT >#27#return; 1173#L14-1 [2021-11-07 07:38:59,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:59,825 INFO L85 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2021-11-07 07:38:59,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:59,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429551656] [2021-11-07 07:38:59,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:59,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:59,846 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:38:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:38:59,855 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:38:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:38:59,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2021-11-07 07:38:59,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:38:59,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887555969] [2021-11-07 07:38:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:59,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:38:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:59,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-11-07 07:38:59,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 07:38:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:59,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-07 07:38:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 07:38:59,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:38:59,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887555969] [2021-11-07 07:38:59,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887555969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:38:59,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856081918] [2021-11-07 07:38:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:38:59,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:38:59,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:38:59,907 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:38:59,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:38:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:38:59,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:38:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:00,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856081918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:39:00,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 07:39:00,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-07 07:39:00,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579961988] [2021-11-07 07:39:00,007 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-11-07 07:39:00,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:39:00,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:39:00,008 INFO L87 Difference]: Start difference. First operand 104 states and 157 transitions. cyclomatic complexity: 59 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) [2021-11-07 07:39:00,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:00,049 INFO L93 Difference]: Finished difference Result 119 states and 173 transitions. [2021-11-07 07:39:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:39:00,049 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 173 transitions. [2021-11-07 07:39:00,052 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:39:00,057 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 114 states and 164 transitions. [2021-11-07 07:39:00,057 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2021-11-07 07:39:00,057 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2021-11-07 07:39:00,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 164 transitions. [2021-11-07 07:39:00,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-07 07:39:00,058 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 164 transitions. [2021-11-07 07:39:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 164 transitions. [2021-11-07 07:39:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-11-07 07:39:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 68 states have internal predecessors, (70), 32 states have call successors, (32), 18 states have call predecessors, (32), 16 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2021-11-07 07:39:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2021-11-07 07:39:00,073 INFO L704 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2021-11-07 07:39:00,073 INFO L587 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2021-11-07 07:39:00,073 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-11-07 07:39:00,073 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 161 transitions. [2021-11-07 07:39:00,075 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-11-07 07:39:00,075 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-07 07:39:00,075 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-07 07:39:00,076 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:00,076 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-07 07:39:00,077 INFO L791 eck$LassoCheckResult]: Stem: 1427#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1423#L25 call main_#t~ret6 := rec2(main_~x~0);< 1443#rec2ENTRY ~j := #in~j; 1498#L18 assume !(~j <= 0); 1480#L20 call #t~ret3 := rec1(~j);< 1496#rec1ENTRY ~i := #in~i; 1490#L12 assume !(~i <= 0); 1434#L14 call #t~ret0 := rec1(~i - 2);< 1486#rec1ENTRY ~i := #in~i; 1483#L12 assume !(~i <= 0); 1431#L14 call #t~ret0 := rec1(~i - 2);< 1482#rec1ENTRY ~i := #in~i; 1485#L12 assume ~i <= 0;#res := 0; 1461#rec1FINAL assume true; 1462#rec1EXIT >#27#return; 1457#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1458#rec1ENTRY ~i := #in~i; 1501#L12 assume ~i <= 0;#res := 0; 1500#rec1FINAL assume true; 1487#rec1EXIT >#29#return; 1444#L14-2 call #t~ret2 := rec1(#t~ret1);< 1445#rec1ENTRY ~i := #in~i; 1471#L12 assume ~i <= 0;#res := 0; 1472#rec1FINAL assume true; 1464#rec1EXIT >#31#return; 1465#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1492#rec1FINAL assume true; 1488#rec1EXIT >#27#return; 1435#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1475#rec1ENTRY [2021-11-07 07:39:00,077 INFO L793 eck$LassoCheckResult]: Loop: 1475#rec1ENTRY ~i := #in~i; 1503#L12 assume !(~i <= 0); 1432#L14 call #t~ret0 := rec1(~i - 2);< 1475#rec1ENTRY [2021-11-07 07:39:00,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:00,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2021-11-07 07:39:00,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:00,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452926979] [2021-11-07 07:39:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:00,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:39:00,091 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:39:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:39:00,112 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:39:00,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:00,118 INFO L85 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2021-11-07 07:39:00,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:00,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981564807] [2021-11-07 07:39:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:00,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:39:00,124 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:39:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:39:00,131 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:39:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:00,133 INFO L85 PathProgramCache]: Analyzing trace with hash -2050992272, now seen corresponding path program 2 times [2021-11-07 07:39:00,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:00,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869627516] [2021-11-07 07:39:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:00,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:00,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:00,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 07:39:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:00,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:39:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:00,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 07:39:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:00,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 07:39:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 07:39:00,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:00,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869627516] [2021-11-07 07:39:00,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869627516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:00,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479868287] [2021-11-07 07:39:00,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:39:00,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:00,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:00,303 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:00,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:39:00,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:39:00,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:00,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:39:00,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-07 07:39:00,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479868287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:00,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:00,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-11-07 07:39:00,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163151328] [2021-11-07 07:39:00,544 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:39:00,544 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:39:00,545 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:39:00,545 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:39:00,545 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-07 07:39:00,545 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:00,545 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:39:00,545 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:39:00,546 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2021-11-07 07:39:00,546 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:39:00,546 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:39:00,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,587 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:39:00,587 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-07 07:39:00,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:00,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:00,589 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:00,596 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:39:00,596 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:00,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-11-07 07:39:00,623 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:39:00,623 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:39:00,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-11-07 07:39:00,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:00,659 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:00,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-11-07 07:39:00,661 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:39:00,662 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:00,672 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:39:00,672 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:39:00,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:00,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:00,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:00,708 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:00,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-11-07 07:39:00,710 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:39:00,710 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:00,720 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:39:00,720 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:39:00,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-11-07 07:39:00,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:00,744 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:00,747 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:39:00,747 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:00,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-11-07 07:39:00,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:00,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:00,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:00,801 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:00,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-11-07 07:39:00,802 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-07 07:39:00,802 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:00,947 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-07 07:39:00,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:00,951 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:39:00,951 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:39:00,951 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:39:00,951 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:39:00,951 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-07 07:39:00,951 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:00,951 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:39:00,951 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:39:00,951 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2021-11-07 07:39:00,952 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:39:00,952 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:39:00,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:00,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:01,001 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:39:01,002 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-07 07:39:01,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:01,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:01,003 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:01,011 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 [2021-11-07 07:39:01,022 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:39:01,023 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:39:01,023 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:39:01,023 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:39:01,023 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:39:01,024 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:39:01,024 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:39:01,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-11-07 07:39:01,034 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:39:01,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2021-11-07 07:39:01,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:01,065 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:01,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-11-07 07:39:01,067 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 [2021-11-07 07:39:01,078 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:39:01,078 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:39:01,078 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:39:01,078 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:39:01,078 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:39:01,079 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:39:01,079 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:39:01,090 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:39:01,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:01,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:01,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:01,118 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:01,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-11-07 07:39:01,120 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 [2021-11-07 07:39:01,128 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:39:01,128 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:39:01,128 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:39:01,128 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:39:01,128 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:39:01,129 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:39:01,129 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:39:01,131 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-07 07:39:01,133 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-07 07:39:01,133 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-07 07:39:01,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:01,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:01,135 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:01,136 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-07 07:39:01,136 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-07 07:39:01,136 INFO L513 LassoAnalysis]: Proved termination. [2021-11-07 07:39:01,136 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-11-07 07:39:01,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-11-07 07:39:01,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:01,160 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-07 07:39:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:01,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:39:01,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:01,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:01,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:39:01,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:01,836 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 [2021-11-07 07:39:01,836 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:01,906 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 128 states and 179 transitions. Complement of second has 7 states. [2021-11-07 07:39:01,907 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 [2021-11-07 07:39:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-11-07 07:39:01,908 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2021-11-07 07:39:01,908 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:01,909 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-07 07:39:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:01,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:39:01,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:39:02,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:02,504 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 [2021-11-07 07:39:02,504 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:02,562 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 128 states and 179 transitions. Complement of second has 7 states. [2021-11-07 07:39:02,563 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 [2021-11-07 07:39:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-11-07 07:39:02,564 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2021-11-07 07:39:02,564 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:02,564 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-07 07:39:02,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:39:02,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:03,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:39:03,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:03,185 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 [2021-11-07 07:39:03,186 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:03,301 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 156 states and 218 transitions. Complement of second has 13 states. [2021-11-07 07:39:03,302 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 [2021-11-07 07:39:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2021-11-07 07:39:03,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2021-11-07 07:39:03,306 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:03,306 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2021-11-07 07:39:03,307 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:03,307 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2021-11-07 07:39:03,308 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:03,308 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 156 states and 218 transitions. [2021-11-07 07:39:03,312 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2021-11-07 07:39:03,320 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 156 states to 138 states and 200 transitions. [2021-11-07 07:39:03,320 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2021-11-07 07:39:03,321 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2021-11-07 07:39:03,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 200 transitions. [2021-11-07 07:39:03,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-07 07:39:03,328 INFO L681 BuchiCegarLoop]: Abstraction has 138 states and 200 transitions. [2021-11-07 07:39:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states and 200 transitions. [2021-11-07 07:39:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2021-11-07 07:39:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 74 states have internal predecessors, (78), 32 states have call successors, (32), 20 states have call predecessors, (32), 18 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2021-11-07 07:39:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2021-11-07 07:39:03,366 INFO L704 BuchiCegarLoop]: Abstraction has 119 states and 169 transitions. [2021-11-07 07:39:03,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:03,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:39:03,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:39:03,370 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 07:39:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:03,434 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-11-07 07:39:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:39:03,435 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 115 transitions. [2021-11-07 07:39:03,437 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-07 07:39:03,440 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 62 states and 74 transitions. [2021-11-07 07:39:03,440 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-11-07 07:39:03,440 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-11-07 07:39:03,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 74 transitions. [2021-11-07 07:39:03,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-07 07:39:03,441 INFO L681 BuchiCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-11-07 07:39:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 74 transitions. [2021-11-07 07:39:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-11-07 07:39:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-07 07:39:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-11-07 07:39:03,461 INFO L704 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-11-07 07:39:03,461 INFO L587 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-11-07 07:39:03,461 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-11-07 07:39:03,461 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 53 states and 64 transitions. [2021-11-07 07:39:03,462 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-07 07:39:03,462 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-07 07:39:03,462 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-07 07:39:03,465 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:39:03,465 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-07 07:39:03,465 INFO L791 eck$LassoCheckResult]: Stem: 2652#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 2650#L25 call main_#t~ret6 := rec2(main_~x~0);< 2659#rec2ENTRY ~j := #in~j; 2668#L18 assume !(~j <= 0); 2682#L20 call #t~ret3 := rec1(~j);< 2696#rec1ENTRY ~i := #in~i; 2695#L12 assume !(~i <= 0); 2656#L14 call #t~ret0 := rec1(~i - 2);< 2693#rec1ENTRY ~i := #in~i; 2698#L12 assume ~i <= 0;#res := 0; 2697#rec1FINAL assume true; 2666#rec1EXIT >#27#return; 2667#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2663#rec1ENTRY ~i := #in~i; 2691#L12 assume ~i <= 0;#res := 0; 2690#rec1FINAL assume true; 2688#rec1EXIT >#29#return; 2686#L14-2 call #t~ret2 := rec1(#t~ret1);< 2661#rec1ENTRY ~i := #in~i; 2689#L12 assume ~i <= 0;#res := 0; 2687#rec1FINAL assume true; 2685#rec1EXIT >#31#return; 2684#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 2683#rec1FINAL assume true; 2681#rec1EXIT >#33#return; 2649#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2651#rec2ENTRY ~j := #in~j; 2670#L18 assume !(~j <= 0); 2671#L20 call #t~ret3 := rec1(~j);< 2677#rec1ENTRY [2021-11-07 07:39:03,465 INFO L793 eck$LassoCheckResult]: Loop: 2677#rec1ENTRY ~i := #in~i; 2673#L12 assume !(~i <= 0); 2674#L14 call #t~ret0 := rec1(~i - 2);< 2677#rec1ENTRY [2021-11-07 07:39:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:03,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1852176490, now seen corresponding path program 2 times [2021-11-07 07:39:03,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:03,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076693023] [2021-11-07 07:39:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:03,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:03,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-07 07:39:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:03,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-07 07:39:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:03,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 07:39:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:03,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 07:39:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 07:39:03,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:39:03,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076693023] [2021-11-07 07:39:03,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076693023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:03,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380286819] [2021-11-07 07:39:03,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:39:03,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:39:03,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:03,632 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:39:03,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:39:03,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:39:03,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:39:03,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:39:03,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-07 07:39:03,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380286819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:39:03,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:39:03,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-11-07 07:39:03,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31972748] [2021-11-07 07:39:03,913 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-07 07:39:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 4 times [2021-11-07 07:39:03,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:39:03,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091788725] [2021-11-07 07:39:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:39:03,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:39:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:39:03,920 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 07:39:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 07:39:03,923 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 07:39:03,953 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:39:03,953 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:39:03,954 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:39:03,954 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:39:03,954 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-07 07:39:03,954 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:03,954 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:39:03,954 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:39:03,954 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2021-11-07 07:39:03,955 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:39:03,955 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:39:03,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:03,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:03,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:03,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:03,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:03,968 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:03,996 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:39:03,997 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-07 07:39:03,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:03,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:03,998 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,007 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:39:04,008 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:04,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-11-07 07:39:04,019 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:39:04,019 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:39:04,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2021-11-07 07:39:04,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,042 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-11-07 07:39:04,081 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:39:04,081 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:04,090 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:39:04,090 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:39:04,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:04,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,113 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-11-07 07:39:04,114 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:39:04,114 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:04,124 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:39:04,124 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:39:04,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2021-11-07 07:39:04,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,150 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-11-07 07:39:04,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:39:04,151 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:04,162 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-07 07:39:04,163 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-07 07:39:04,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:04,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,185 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-11-07 07:39:04,186 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-07 07:39:04,187 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:04,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Ended with exit code 0 [2021-11-07 07:39:04,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,229 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-11-07 07:39:04,232 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-07 07:39:04,232 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-07 07:39:04,269 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-07 07:39:04,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Ended with exit code 0 [2021-11-07 07:39:04,271 INFO L210 LassoAnalysis]: Preferences: [2021-11-07 07:39:04,272 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-07 07:39:04,272 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-07 07:39:04,272 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-07 07:39:04,272 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-07 07:39:04,272 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,272 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-07 07:39:04,272 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-07 07:39:04,272 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2021-11-07 07:39:04,272 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-07 07:39:04,272 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-07 07:39:04,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:04,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:04,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:04,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:04,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:04,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-07 07:39:04,325 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-07 07:39:04,325 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-07 07:39:04,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,329 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-11-07 07:39:04,331 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 [2021-11-07 07:39:04,339 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:39:04,339 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:39:04,339 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:39:04,339 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:39:04,339 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:39:04,340 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:39:04,340 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:39:04,342 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:39:04,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:04,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,364 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-11-07 07:39:04,366 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 [2021-11-07 07:39:04,373 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:39:04,373 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:39:04,373 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:39:04,373 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:39:04,373 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:39:04,374 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:39:04,374 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:39:04,375 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:39:04,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Ended with exit code 0 [2021-11-07 07:39:04,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,398 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-11-07 07:39:04,399 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 [2021-11-07 07:39:04,408 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:39:04,408 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:39:04,408 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:39:04,408 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:39:04,408 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:39:04,409 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:39:04,409 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:39:04,410 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:39:04,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:04,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,433 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-11-07 07:39:04,434 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 [2021-11-07 07:39:04,442 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:39:04,443 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:39:04,443 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:39:04,443 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:39:04,443 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:39:04,443 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:39:04,443 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:39:04,445 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-07 07:39:04,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2021-11-07 07:39:04,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,467 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-11-07 07:39:04,468 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 [2021-11-07 07:39:04,476 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-07 07:39:04,476 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-07 07:39:04,477 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-07 07:39:04,477 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-07 07:39:04,477 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-07 07:39:04,477 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-07 07:39:04,478 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-07 07:39:04,510 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-07 07:39:04,513 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-07 07:39:04,513 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-07 07:39:04,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-07 07:39:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:39:04,523 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-07 07:39:04,527 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-07 07:39:04,527 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-07 07:39:04,527 INFO L513 LassoAnalysis]: Proved termination. [2021-11-07 07:39:04,527 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-11-07 07:39:04,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-11-07 07:39:04,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Ended with exit code 0 [2021-11-07 07:39:04,549 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-07 07:39:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:04,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:39:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:05,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:39:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:05,156 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 [2021-11-07 07:39:05,156 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:05,234 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 63 states and 75 transitions. Complement of second has 13 states. [2021-11-07 07:39:05,235 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 [2021-11-07 07:39:05,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2021-11-07 07:39:05,236 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2021-11-07 07:39:05,236 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:05,236 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-07 07:39:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:05,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:39:05,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:05,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:05,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:39:05,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:05,832 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 [2021-11-07 07:39:05,832 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:05,896 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 63 states and 75 transitions. Complement of second has 13 states. [2021-11-07 07:39:05,897 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 [2021-11-07 07:39:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2021-11-07 07:39:05,898 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2021-11-07 07:39:05,898 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:05,898 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-07 07:39:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:39:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:05,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:39:05,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:39:06,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:39:06,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:39:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:39:06,388 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 [2021-11-07 07:39:06,388 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:06,475 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 77 states and 89 transitions. Complement of second has 13 states. [2021-11-07 07:39:06,475 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 [2021-11-07 07:39:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 07:39:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2021-11-07 07:39:06,476 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2021-11-07 07:39:06,477 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:06,477 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2021-11-07 07:39:06,478 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:06,478 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2021-11-07 07:39:06,478 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-07 07:39:06,478 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 89 transitions. [2021-11-07 07:39:06,480 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-07 07:39:06,480 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 0 states and 0 transitions. [2021-11-07 07:39:06,480 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-11-07 07:39:06,480 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-11-07 07:39:06,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-11-07 07:39:06,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:39:06,481 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 07:39:06,481 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 07:39:06,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:39:06,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:39:06,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:39:06,482 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 07:39:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:39:06,483 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-11-07 07:39:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 07:39:06,483 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-11-07 07:39:06,483 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-07 07:39:06,483 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-11-07 07:39:06,484 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-11-07 07:39:06,484 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-11-07 07:39:06,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-11-07 07:39:06,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-07 07:39:06,484 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 07:39:06,484 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 07:39:06,484 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-07 07:39:06,485 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-11-07 07:39:06,485 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-11-07 07:39:06,485 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-07 07:39:06,485 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-11-07 07:39:06,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.11 07:39:06 BoogieIcfgContainer [2021-11-07 07:39:06,495 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-07 07:39:06,496 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 07:39:06,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 07:39:06,496 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 07:39:06,497 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:38:53" (3/4) ... [2021-11-07 07:39:06,500 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 07:39:06,500 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 07:39:06,502 INFO L168 Benchmark]: Toolchain (without parser) took 13735.00 ms. Allocated memory was 125.8 MB in the beginning and 186.6 MB in the end (delta: 60.8 MB). Free memory was 86.9 MB in the beginning and 72.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 75.8 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:06,503 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 125.8 MB. Free memory is still 103.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:39:06,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.48 ms. Allocated memory is still 125.8 MB. Free memory was 86.7 MB in the beginning and 102.6 MB in the end (delta: -15.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:06,505 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.77 ms. Allocated memory is still 125.8 MB. Free memory was 102.6 MB in the beginning and 101.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:39:06,507 INFO L168 Benchmark]: Boogie Preprocessor took 21.79 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 100.6 MB in the end (delta: 817.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:06,507 INFO L168 Benchmark]: RCFGBuilder took 290.24 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 92.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:06,508 INFO L168 Benchmark]: BuchiAutomizer took 13077.05 ms. Allocated memory was 125.8 MB in the beginning and 186.6 MB in the end (delta: 60.8 MB). Free memory was 92.2 MB in the beginning and 73.2 MB in the end (delta: 19.0 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:06,508 INFO L168 Benchmark]: Witness Printer took 4.69 ms. Allocated memory is still 186.6 MB. Free memory was 73.2 MB in the beginning and 72.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 07:39:06,512 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 125.8 MB. Free memory is still 103.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.48 ms. Allocated memory is still 125.8 MB. Free memory was 86.7 MB in the beginning and 102.6 MB in the end (delta: -15.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.77 ms. Allocated memory is still 125.8 MB. Free memory was 102.6 MB in the beginning and 101.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.79 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 100.6 MB in the end (delta: 817.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 290.24 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 92.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 13077.05 ms. Allocated memory was 125.8 MB in the beginning and 186.6 MB in the end (delta: 60.8 MB). Free memory was 92.2 MB in the beginning and 73.2 MB in the end (delta: 19.0 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.69 ms. Allocated memory is still 186.6 MB. Free memory was 73.2 MB in the beginning and 72.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 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 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 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 13.0s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 6.6s. Construction of modules took 0.4s. Büchi inclusion checks took 5.5s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 111 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 188 SDtfs, 184 SDslu, 311 SDs, 0 SdLazy, 314 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf96 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq149 hnf94 smp100 dnf100 smp100 tf112 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 41ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-11-07 07:39:06,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:06,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:06,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 07:39:07,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32bd7767-582e-49a8-9185-3190185964a5/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE