./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:21:30,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:21:30,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:21:30,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:21:30,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:21:30,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:21:30,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:21:30,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:21:30,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:21:30,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:21:30,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:21:30,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:21:30,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:21:30,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:21:30,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:21:30,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:21:30,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:21:30,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:21:30,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:21:30,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:21:30,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:21:30,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:21:30,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:21:30,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:21:30,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:21:30,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:21:30,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:21:30,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:21:30,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:21:30,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:21:30,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:21:30,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:21:30,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:21:30,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:21:30,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:21:30,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:21:30,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:21:30,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:21:30,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:21:30,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:21:30,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:21:30,516 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-21 20:21:30,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:21:30,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:21:30,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:21:30,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:21:30,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:21:30,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:21:30,583 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:21:30,583 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-21 20:21:30,584 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-21 20:21:30,584 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-21 20:21:30,585 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-21 20:21:30,585 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-21 20:21:30,585 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-21 20:21:30,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:21:30,586 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:21:30,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:21:30,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:21:30,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-21 20:21:30,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-21 20:21:30,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-21 20:21:30,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 20:21:30,588 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-21 20:21:30,588 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:21:30,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-21 20:21:30,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:21:30,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:21:30,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:21:30,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:21:30,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:21:30,592 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-21 20:21:30,592 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_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9948dbd77aeb2de72e0bd3a3a4e22b1606b19383e4631af58adbec46ed909b6c [2021-10-21 20:21:30,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:21:30,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:21:30,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:21:30,900 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:21:30,901 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:21:30,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2021-10-21 20:21:30,979 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/data/079adb69c/2eba819e351f4333b32c8fcdc3813a13/FLAG47f34b626 [2021-10-21 20:21:31,466 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:21:31,467 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2021-10-21 20:21:31,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/data/079adb69c/2eba819e351f4333b32c8fcdc3813a13/FLAG47f34b626 [2021-10-21 20:21:31,829 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/data/079adb69c/2eba819e351f4333b32c8fcdc3813a13 [2021-10-21 20:21:31,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:21:31,840 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 20:21:31,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:21:31,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:21:31,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:21:31,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:21:31" (1/1) ... [2021-10-21 20:21:31,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa8a4dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:31, skipping insertion in model container [2021-10-21 20:21:31,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:21:31" (1/1) ... [2021-10-21 20:21:31,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:21:31,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:21:32,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:21:32,025 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:21:32,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:21:32,071 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:21:32,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32 WrapperNode [2021-10-21 20:21:32,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:21:32,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 20:21:32,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 20:21:32,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 20:21:32,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 20:21:32,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:21:32,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:21:32,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:21:32,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:21:32,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:21:32,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:21:32,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:21:32,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (1/1) ... [2021-10-21 20:21:32,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:32,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:32,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:32,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-21 20:21:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-10-21 20:21:32,241 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-10-21 20:21:32,241 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-10-21 20:21:32,241 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-10-21 20:21:32,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:21:32,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:21:32,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:21:32,392 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 20:21:32,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:21:32 BoogieIcfgContainer [2021-10-21 20:21:32,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:21:32,396 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-21 20:21:32,396 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-21 20:21:32,399 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-21 20:21:32,411 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 20:21:32,411 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.10 08:21:31" (1/3) ... [2021-10-21 20:21:32,412 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@33211cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 08:21:32, skipping insertion in model container [2021-10-21 20:21:32,413 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 20:21:32,413 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:21:32" (2/3) ... [2021-10-21 20:21:32,413 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@33211cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 08:21:32, skipping insertion in model container [2021-10-21 20:21:32,414 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 20:21:32,414 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:21:32" (3/3) ... [2021-10-21 20:21:32,415 INFO L389 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2021-10-21 20:21:32,486 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-21 20:21:32,486 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-21 20:21:32,486 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-21 20:21:32,487 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-21 20:21:32,487 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-21 20:21:32,487 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-21 20:21:32,487 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-21 20:21:32,487 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-21 20:21:32,502 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) [2021-10-21 20:21:32,525 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-21 20:21:32,525 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:32,525 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:32,532 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 20:21:32,532 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:32,532 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-21 20:21:32,533 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) [2021-10-21 20:21:32,537 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-21 20:21:32,537 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:32,538 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:32,538 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 20:21:32,539 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:32,545 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 [2021-10-21 20:21:32,546 INFO L793 eck$LassoCheckResult]: Loop: 16#rec2ENTRYtrue ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j - 1);< 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);< 16#rec2ENTRYtrue [2021-10-21 20:21:32,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:32,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2021-10-21 20:21:32,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:32,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292824721] [2021-10-21 20:21:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:32,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:32,629 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:32,649 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:32,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2021-10-21 20:21:32,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:32,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375543613] [2021-10-21 20:21:32,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:32,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:32,670 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:32,679 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:32,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:32,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2021-10-21 20:21:32,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:32,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28265020] [2021-10-21 20:21:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:32,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:32,692 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:32,703 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:32,929 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:32,930 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:32,930 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:32,930 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:32,930 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:32,931 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:32,931 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:32,931 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:32,931 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2021-10-21 20:21:32,931 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:32,931 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:32,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:32,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:32,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:32,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:32,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:33,022 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:33,022 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:33,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-21 20:21:33,030 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:33,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:33,051 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:33,051 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:33,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-21 20:21:33,082 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:33,082 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:33,091 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:33,091 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:33,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,121 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,144 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:33,144 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:33,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-21 20:21:33,168 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:33,168 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:33,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-21 20:21:33,206 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:33,206 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:33,214 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:33,214 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:33,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,238 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-21 20:21:33,240 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:33,241 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:33,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-21 20:21:33,317 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:33,317 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:33,336 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:33,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,367 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:33,367 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:33,367 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:33,367 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:33,367 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:33,367 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,367 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:33,367 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:33,367 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2021-10-21 20:21:33,367 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:33,368 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:33,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:33,371 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:33,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:33,376 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:33,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:33,454 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:33,469 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:33,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-21 20:21:33,500 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 [2021-10-21 20:21:33,509 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:33,510 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:33,510 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:33,510 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:33,510 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:33,512 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:33,512 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:33,528 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:33,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,562 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,572 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 [2021-10-21 20:21:33,581 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:33,582 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:33,582 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:33,582 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:33,582 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:33,584 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:33,584 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:33,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-21 20:21:33,596 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:33,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,636 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-21 20:21:33,640 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 [2021-10-21 20:21:33,649 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:33,649 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:33,649 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:33,649 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:33,649 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:33,653 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:33,654 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:33,668 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:33,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,702 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-21 20:21:33,708 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 [2021-10-21 20:21:33,716 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:33,716 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:33,716 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:33,716 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:33,716 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:33,718 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:33,718 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:33,724 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:33,734 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 20:21:33,734 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 20:21:33,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:33,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:33,740 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:33,748 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:33,749 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:33,749 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:33,749 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2021-10-21 20:21:33,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-21 20:21:33,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:33,773 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:33,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:33,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 20:21:33,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:21:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:34,010 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2021-10-21 20:21:34,011 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. 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 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:21:34,505 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. 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 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 194 states and 279 transitions. Complement of second has 61 states. [2021-10-21 20:21:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:21:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2021-10-21 20:21:34,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2021-10-21 20:21:34,513 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:34,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2021-10-21 20:21:34,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:34,514 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2021-10-21 20:21:34,515 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:34,516 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2021-10-21 20:21:34,546 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-21 20:21:34,556 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2021-10-21 20:21:34,557 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2021-10-21 20:21:34,558 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2021-10-21 20:21:34,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2021-10-21 20:21:34,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:34,559 INFO L681 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2021-10-21 20:21:34,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2021-10-21 20:21:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2021-10-21 20:21:34,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2021-10-21 20:21:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2021-10-21 20:21:34,619 INFO L704 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2021-10-21 20:21:34,619 INFO L587 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2021-10-21 20:21:34,619 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-21 20:21:34,619 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2021-10-21 20:21:34,622 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-21 20:21:34,623 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:34,623 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:34,623 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:34,624 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:21:34,624 INFO L791 eck$LassoCheckResult]: Stem: 350#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; 347#L25 call main_#t~ret6 := rec2(main_~x~0);< 363#rec2ENTRY ~j := #in~j; 379#L18 assume !(~j <= 0); 352#L20 call #t~ret3 := rec1(~j - 1);< 383#rec1ENTRY ~i := #in~i; 380#L12 assume !(~i <= 0); 365#L14 call #t~ret0 := rec1(~i - 2);< 371#rec1ENTRY [2021-10-21 20:21:34,624 INFO L793 eck$LassoCheckResult]: Loop: 371#rec1ENTRY ~i := #in~i; 385#L12 assume !(~i <= 0); 368#L14 call #t~ret0 := rec1(~i - 2);< 371#rec1ENTRY [2021-10-21 20:21:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:34,625 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2021-10-21 20:21:34,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:34,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215736178] [2021-10-21 20:21:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:34,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:34,642 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:34,658 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:34,659 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2021-10-21 20:21:34,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:34,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120489201] [2021-10-21 20:21:34,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:34,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:34,672 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:34,681 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:34,682 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2021-10-21 20:21:34,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:34,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859038740] [2021-10-21 20:21:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:34,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:34,704 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:34,712 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:34,764 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:34,764 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:34,764 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:34,764 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:34,764 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:34,765 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:34,765 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:34,765 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:34,765 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2021-10-21 20:21:34,765 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:34,765 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:34,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:34,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:34,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:34,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:34,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:34,778 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:34,817 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:34,817 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:34,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:34,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:34,820 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:34,832 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:34,832 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:34,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-21 20:21:34,856 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:34,857 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:34,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:34,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:34,892 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:34,895 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:34,895 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:34,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-21 20:21:34,920 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:34,920 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:34,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:34,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:34,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:34,953 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:34,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-21 20:21:34,959 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:34,959 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:34,977 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:34,977 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:35,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-10-21 20:21:35,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,001 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-21 20:21:35,002 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:35,003 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:35,011 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:35,011 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:35,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:35,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,032 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-21 20:21:35,064 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:35,064 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:35,072 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:35,072 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:35,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:35,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,094 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-21 20:21:35,120 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:35,120 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:35,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:35,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:35,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,167 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-21 20:21:35,169 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:35,169 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:35,286 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:35,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:35,292 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:35,292 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:35,292 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:35,292 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:35,293 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:35,293 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,293 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:35,293 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:35,293 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2021-10-21 20:21:35,293 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:35,293 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:35,294 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:35,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:35,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:35,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:35,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:35,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:35,348 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:35,348 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:35,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,350 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,360 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 [2021-10-21 20:21:35,368 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:35,369 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:35,369 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:35,369 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:35,369 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:35,370 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:35,370 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:35,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-21 20:21:35,385 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:35,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:35,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,419 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,429 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 [2021-10-21 20:21:35,438 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:35,438 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:35,438 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:35,439 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:35,439 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:35,439 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:35,440 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:35,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-21 20:21:35,452 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:35,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:35,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,492 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,494 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 [2021-10-21 20:21:35,503 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:35,503 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:35,504 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:35,504 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:35,504 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:35,505 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:35,505 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:35,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-21 20:21:35,516 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:35,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:35,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,552 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,557 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 [2021-10-21 20:21:35,565 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:35,566 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:35,566 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:35,566 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:35,566 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:35,567 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:35,567 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:35,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-21 20:21:35,579 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:35,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:35,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,608 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,609 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 [2021-10-21 20:21:35,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-21 20:21:35,617 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:35,617 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:35,617 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:35,617 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:35,617 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:35,618 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:35,618 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:35,621 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:35,623 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-21 20:21:35,623 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-21 20:21:35,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:35,624 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:35,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-21 20:21:35,626 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:35,626 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:35,626 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:35,626 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-10-21 20:21:35,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-10-21 20:21:35,646 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:35,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:21:35,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:35,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:35,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:35,794 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 [2021-10-21 20:21:35,794 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 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) [2021-10-21 20:21:35,846 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. 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 105 states and 149 transitions. Complement of second has 13 states. [2021-10-21 20:21:35,847 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 [2021-10-21 20:21:35,848 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) [2021-10-21 20:21:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2021-10-21 20:21:35,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2021-10-21 20:21:35,848 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:35,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2021-10-21 20:21:35,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:35,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2021-10-21 20:21:35,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:35,849 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2021-10-21 20:21:35,857 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-21 20:21:35,867 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2021-10-21 20:21:35,868 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2021-10-21 20:21:35,868 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2021-10-21 20:21:35,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2021-10-21 20:21:35,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:35,870 INFO L681 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2021-10-21 20:21:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2021-10-21 20:21:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-10-21 20:21:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.22) internal successors, (61), 57 states have internal predecessors, (61), 27 states have call successors, (27), 15 states have call predecessors, (27), 12 states have return successors, (41), 16 states have call predecessors, (41), 22 states have call successors, (41) [2021-10-21 20:21:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2021-10-21 20:21:35,888 INFO L704 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2021-10-21 20:21:35,888 INFO L587 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2021-10-21 20:21:35,888 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-21 20:21:35,889 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2021-10-21 20:21:35,892 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-21 20:21:35,893 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:35,893 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:35,894 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:35,894 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:21:35,894 INFO L791 eck$LassoCheckResult]: Stem: 577#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; 572#L25 call main_#t~ret6 := rec2(main_~x~0);< 593#rec2ENTRY ~j := #in~j; 644#L18 assume !(~j <= 0); 597#L20 call #t~ret3 := rec1(~j - 1);< 614#rec1ENTRY ~i := #in~i; 608#L12 assume !(~i <= 0); 585#L14 call #t~ret0 := rec1(~i - 2);< 611#rec1ENTRY ~i := #in~i; 635#L12 assume ~i <= 0;#res := 0; 634#rec1FINAL assume true; 631#rec1EXIT >#27#return; 584#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 594#rec1ENTRY [2021-10-21 20:21:35,894 INFO L793 eck$LassoCheckResult]: Loop: 594#rec1ENTRY ~i := #in~i; 630#L12 assume !(~i <= 0); 579#L14 call #t~ret0 := rec1(~i - 2);< 594#rec1ENTRY [2021-10-21 20:21:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:35,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2021-10-21 20:21:35,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:35,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470216930] [2021-10-21 20:21:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:35,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:35,923 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:35,930 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:35,931 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2021-10-21 20:21:35,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:35,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822159458] [2021-10-21 20:21:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:35,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:35,934 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:35,944 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:35,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:35,945 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2021-10-21 20:21:35,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:35,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596825829] [2021-10-21 20:21:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:35,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:36,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 20:21:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:21:36,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:36,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596825829] [2021-10-21 20:21:36,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596825829] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:21:36,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:21:36,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 20:21:36,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107095896] [2021-10-21 20:21:36,092 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:36,092 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:36,092 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:36,092 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:36,092 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:36,092 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:36,092 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:36,092 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:36,093 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2021-10-21 20:21:36,093 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:36,093 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:36,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,096 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,101 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,106 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,136 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:36,136 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:36,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:36,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:36,140 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:36,145 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:36,145 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:36,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-21 20:21:36,168 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:36,168 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:36,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-10-21 20:21:36,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:36,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:36,191 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:36,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-21 20:21:36,193 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:36,193 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:36,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:36,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:36,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:36,225 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:36,231 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:36,231 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:36,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-21 20:21:36,273 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:36,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:36,278 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:36,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:36,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:36,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:36,278 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:36,278 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:36,278 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:36,278 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:36,278 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2021-10-21 20:21:36,278 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:36,278 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:36,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,294 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:36,329 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:36,329 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:36,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:36,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:36,331 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:36,337 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 [2021-10-21 20:21:36,345 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:36,345 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:36,346 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:36,346 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:36,346 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:36,347 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:36,347 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:36,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-21 20:21:36,360 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:36,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:36,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:36,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:36,396 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:36,399 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 [2021-10-21 20:21:36,408 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:36,408 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:36,408 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:36,408 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:36,408 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:36,409 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:36,409 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:36,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-21 20:21:36,420 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:36,432 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-21 20:21:36,432 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-21 20:21:36,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:36,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:36,434 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:36,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-21 20:21:36,439 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:36,439 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:36,439 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:36,439 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-10-21 20:21:36,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:36,466 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 20:21:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:36,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:36,681 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 [2021-10-21 20:21:36,682 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 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) [2021-10-21 20:21:36,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:36,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:36,783 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. 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 134 states and 193 transitions. Complement of second has 14 states. [2021-10-21 20:21:36,786 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 [2021-10-21 20:21:36,786 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) [2021-10-21 20:21:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2021-10-21 20:21:36,786 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2021-10-21 20:21:36,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:36,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2021-10-21 20:21:36,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:36,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2021-10-21 20:21:36,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:36,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2021-10-21 20:21:36,789 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-21 20:21:36,793 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2021-10-21 20:21:36,793 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-10-21 20:21:36,793 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2021-10-21 20:21:36,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2021-10-21 20:21:36,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:36,794 INFO L681 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2021-10-21 20:21:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2021-10-21 20:21:36,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2021-10-21 20:21:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.234375) internal successors, (79), 73 states have internal predecessors, (79), 33 states have call successors, (33), 19 states have call predecessors, (33), 16 states have return successors, (53), 20 states have call predecessors, (53), 28 states have call successors, (53) [2021-10-21 20:21:36,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2021-10-21 20:21:36,821 INFO L704 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2021-10-21 20:21:36,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:36,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:21:36,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:21:36,825 INFO L87 Difference]: Start difference. First operand 113 states and 165 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) [2021-10-21 20:21:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:36,874 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2021-10-21 20:21:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:21:36,875 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2021-10-21 20:21:36,878 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2021-10-21 20:21:36,885 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2021-10-21 20:21:36,885 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2021-10-21 20:21:36,886 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2021-10-21 20:21:36,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2021-10-21 20:21:36,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:36,886 INFO L681 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2021-10-21 20:21:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2021-10-21 20:21:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2021-10-21 20:21:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 63 states have internal predecessors, (67), 31 states have call successors, (31), 17 states have call predecessors, (31), 14 states have return successors, (45), 20 states have call predecessors, (45), 26 states have call successors, (45) [2021-10-21 20:21:36,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2021-10-21 20:21:36,903 INFO L704 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2021-10-21 20:21:36,903 INFO L587 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2021-10-21 20:21:36,903 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-21 20:21:36,903 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2021-10-21 20:21:36,904 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-21 20:21:36,904 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:36,905 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:36,905 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:36,906 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:36,906 INFO L791 eck$LassoCheckResult]: Stem: 1133#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; 1127#L25 call main_#t~ret6 := rec2(main_~x~0);< 1149#rec2ENTRY ~j := #in~j; 1193#L18 assume !(~j <= 0); 1135#L20 call #t~ret3 := rec1(~j - 1);< 1192#rec1ENTRY ~i := #in~i; 1191#L12 assume !(~i <= 0); 1152#L14 call #t~ret0 := rec1(~i - 2);< 1190#rec1ENTRY ~i := #in~i; 1188#L12 assume !(~i <= 0); 1157#L14 call #t~ret0 := rec1(~i - 2);< 1187#rec1ENTRY ~i := #in~i; 1189#L12 assume ~i <= 0;#res := 0; 1226#rec1FINAL assume true; 1170#rec1EXIT >#27#return; 1161#L14-1 [2021-10-21 20:21:36,906 INFO L793 eck$LassoCheckResult]: Loop: 1161#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1162#rec1ENTRY ~i := #in~i; 1182#L12 assume ~i <= 0;#res := 0; 1218#rec1FINAL assume true; 1214#rec1EXIT >#29#return; 1150#L14-2 call #t~ret2 := rec1(#t~ret1);< 1159#rec1ENTRY ~i := #in~i; 1217#L12 assume !(~i <= 0); 1153#L14 call #t~ret0 := rec1(~i - 2);< 1159#rec1ENTRY ~i := #in~i; 1217#L12 assume ~i <= 0;#res := 0; 1165#rec1FINAL assume true; 1166#rec1EXIT >#27#return; 1161#L14-1 [2021-10-21 20:21:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:36,907 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2021-10-21 20:21:36,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:36,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273007351] [2021-10-21 20:21:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:36,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:36,914 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:36,921 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:36,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:36,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2021-10-21 20:21:36,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:36,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256614096] [2021-10-21 20:21:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:36,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:36,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:21:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:36,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-21 20:21:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 20:21:36,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:36,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256614096] [2021-10-21 20:21:36,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256614096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:36,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513274465] [2021-10-21 20:21:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:36,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:36,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:36,984 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:36,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 20:21:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 20:21:37,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:37,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513274465] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:21:37,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 20:21:37,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-10-21 20:21:37,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668689468] [2021-10-21 20:21:37,070 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 20:21:37,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:21:37,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:21:37,071 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:21:37,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:37,125 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2021-10-21 20:21:37,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:21:37,128 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2021-10-21 20:21:37,131 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-21 20:21:37,134 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2021-10-21 20:21:37,134 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2021-10-21 20:21:37,135 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2021-10-21 20:21:37,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2021-10-21 20:21:37,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:37,135 INFO L681 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2021-10-21 20:21:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2021-10-21 20:21:37,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2021-10-21 20:21:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 69 states have internal predecessors, (73), 35 states have call successors, (35), 19 states have call predecessors, (35), 16 states have return successors, (49), 24 states have call predecessors, (49), 30 states have call successors, (49) [2021-10-21 20:21:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2021-10-21 20:21:37,144 INFO L704 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2021-10-21 20:21:37,144 INFO L587 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2021-10-21 20:21:37,144 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-21 20:21:37,144 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2021-10-21 20:21:37,145 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-21 20:21:37,146 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:37,146 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:37,147 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:37,147 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:37,147 INFO L791 eck$LassoCheckResult]: Stem: 1410#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1404#L25 call main_#t~ret6 := rec2(main_~x~0);< 1426#rec2ENTRY ~j := #in~j; 1472#L18 assume !(~j <= 0); 1412#L20 call #t~ret3 := rec1(~j - 1);< 1471#rec1ENTRY ~i := #in~i; 1470#L12 assume !(~i <= 0); 1438#L14 call #t~ret0 := rec1(~i - 2);< 1468#rec1ENTRY ~i := #in~i; 1448#L12 assume ~i <= 0;#res := 0; 1437#rec1FINAL assume true; 1439#rec1EXIT >#27#return; 1431#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1432#rec1ENTRY ~i := #in~i; 1491#L12 assume ~i <= 0;#res := 0; 1489#rec1FINAL assume true; 1485#rec1EXIT >#29#return; 1427#L14-2 call #t~ret2 := rec1(#t~ret1);< 1428#rec1ENTRY ~i := #in~i; 1495#L12 assume ~i <= 0;#res := 0; 1494#rec1FINAL assume true; 1493#rec1EXIT >#31#return; 1411#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1414#rec1FINAL assume true; 1465#rec1EXIT >#33#return; 1403#L20-1 [2021-10-21 20:21:37,148 INFO L793 eck$LassoCheckResult]: Loop: 1403#L20-1 call #t~ret4 := rec2(#t~ret3);< 1407#rec2ENTRY ~j := #in~j; 1444#L18 assume !(~j <= 0); 1446#L20 call #t~ret3 := rec1(~j - 1);< 1451#rec1ENTRY ~i := #in~i; 1492#L12 assume !(~i <= 0); 1459#L14 call #t~ret0 := rec1(~i - 2);< 1451#rec1ENTRY ~i := #in~i; 1492#L12 assume ~i <= 0;#res := 0; 1490#rec1FINAL assume true; 1488#rec1EXIT >#27#return; 1486#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1432#rec1ENTRY ~i := #in~i; 1491#L12 assume ~i <= 0;#res := 0; 1489#rec1FINAL assume true; 1485#rec1EXIT >#29#return; 1487#L14-2 call #t~ret2 := rec1(#t~ret1);< 1428#rec1ENTRY ~i := #in~i; 1495#L12 assume ~i <= 0;#res := 0; 1494#rec1FINAL assume true; 1493#rec1EXIT >#31#return; 1464#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1479#rec1FINAL assume true; 1457#rec1EXIT >#33#return; 1403#L20-1 [2021-10-21 20:21:37,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:37,148 INFO L82 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2021-10-21 20:21:37,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:37,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114105377] [2021-10-21 20:21:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:37,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:37,157 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:37,167 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2021-10-21 20:21:37,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:37,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710812762] [2021-10-21 20:21:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:37,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:37,175 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:37,196 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2021-10-21 20:21:37,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:37,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770668227] [2021-10-21 20:21:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:37,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-21 20:21:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:21:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 20:21:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 20:21:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-10-21 20:21:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:21:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 20:21:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 20:21:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-21 20:21:37,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:37,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770668227] [2021-10-21 20:21:37,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770668227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:37,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198347344] [2021-10-21 20:21:37,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:37,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:37,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:37,432 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:37,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 20:21:37,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:21:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-10-21 20:21:37,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198347344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:37,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:37,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-21 20:21:37,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358072699] [2021-10-21 20:21:37,986 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:37,986 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:37,986 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:37,986 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:37,987 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:37,987 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:37,987 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:37,987 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:37,987 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2021-10-21 20:21:37,987 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:37,987 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:37,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:37,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:37,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:38,029 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:38,029 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:38,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:38,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:38,032 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:38,034 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:38,034 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:38,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-21 20:21:38,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:38,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:38,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:38,064 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:38,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-21 20:21:38,065 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:38,065 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:41,566 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:41,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-10-21 20:21:41,569 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:41,569 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:41,569 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:41,569 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:41,569 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:41,569 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,570 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:41,570 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:41,570 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2021-10-21 20:21:41,570 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:41,570 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:41,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:41,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:41,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:41,620 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:41,621 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:41,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,636 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-21 20:21:41,638 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 [2021-10-21 20:21:41,647 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:41,647 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:41,647 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:41,647 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:41,648 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:41,648 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:41,648 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:41,664 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:41,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2021-10-21 20:21:41,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,686 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-21 20:21:41,688 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 [2021-10-21 20:21:41,695 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:41,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:41,695 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:41,695 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:41,695 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:41,696 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:41,696 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:41,699 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:41,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-10-21 20:21:41,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,720 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-21 20:21:41,737 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 [2021-10-21 20:21:41,744 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:41,744 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:41,744 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:41,744 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:41,744 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:41,746 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:41,746 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:41,760 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:41,763 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 20:21:41,763 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 20:21:41,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:41,777 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:41,778 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:41,778 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:41,778 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:41,778 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2021-10-21 20:21:41,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-21 20:21:41,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:41,815 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:41,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:41,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 20:21:41,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:42,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:42,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 20:21:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:42,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 20:21:42,543 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-21 20:21:42,544 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:42,887 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Result 584 states and 903 transitions. Complement of second has 45 states. [2021-10-21 20:21:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2021-10-21 20:21:42,889 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2021-10-21 20:21:42,889 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:42,889 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2021-10-21 20:21:42,890 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:42,890 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2021-10-21 20:21:42,892 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:42,892 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2021-10-21 20:21:42,905 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2021-10-21 20:21:42,922 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2021-10-21 20:21:42,925 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2021-10-21 20:21:42,928 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2021-10-21 20:21:42,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2021-10-21 20:21:42,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:42,929 INFO L681 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2021-10-21 20:21:42,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2021-10-21 20:21:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2021-10-21 20:21:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 202 states have (on average 1.1435643564356435) internal successors, (231), 225 states have internal predecessors, (231), 125 states have call successors, (129), 57 states have call predecessors, (129), 56 states have return successors, (174), 100 states have call predecessors, (174), 116 states have call successors, (174) [2021-10-21 20:21:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2021-10-21 20:21:42,967 INFO L704 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2021-10-21 20:21:42,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 20:21:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:21:42,968 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 5 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-10-21 20:21:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:43,124 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2021-10-21 20:21:43,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:21:43,124 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2021-10-21 20:21:43,133 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2021-10-21 20:21:43,140 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2021-10-21 20:21:43,140 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2021-10-21 20:21:43,141 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2021-10-21 20:21:43,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2021-10-21 20:21:43,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:43,143 INFO L681 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2021-10-21 20:21:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2021-10-21 20:21:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2021-10-21 20:21:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 168 states have (on average 1.1011904761904763) internal successors, (185), 182 states have internal predecessors, (185), 100 states have call successors, (102), 49 states have call predecessors, (102), 46 states have return successors, (128), 82 states have call predecessors, (128), 84 states have call successors, (128) [2021-10-21 20:21:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2021-10-21 20:21:43,164 INFO L704 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2021-10-21 20:21:43,164 INFO L587 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2021-10-21 20:21:43,164 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-21 20:21:43,164 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2021-10-21 20:21:43,167 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2021-10-21 20:21:43,167 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:43,167 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:43,168 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:43,168 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:21:43,168 INFO L791 eck$LassoCheckResult]: Stem: 3392#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3390#L25 call main_#t~ret6 := rec2(main_~x~0);< 3417#rec2ENTRY ~j := #in~j; 3486#L18 assume !(~j <= 0); 3483#L20 call #t~ret3 := rec1(~j - 1);< 3484#rec1ENTRY ~i := #in~i; 3500#L12 assume !(~i <= 0); 3496#L14 call #t~ret0 := rec1(~i - 2);< 3499#rec1ENTRY ~i := #in~i; 3507#L12 assume ~i <= 0;#res := 0; 3545#rec1FINAL assume true; 3543#rec1EXIT >#27#return; 3537#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3538#rec1ENTRY ~i := #in~i; 3541#L12 assume ~i <= 0;#res := 0; 3540#rec1FINAL assume true; 3536#rec1EXIT >#29#return; 3530#L14-2 call #t~ret2 := rec1(#t~ret1);< 3534#rec1ENTRY ~i := #in~i; 3539#L12 assume ~i <= 0;#res := 0; 3535#rec1FINAL assume true; 3533#rec1EXIT >#31#return; 3532#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 3548#rec1FINAL assume true; 3547#rec1EXIT >#33#return; 3446#L20-1 call #t~ret4 := rec2(#t~ret3);< 3445#rec2ENTRY ~j := #in~j; 3447#L18 assume !(~j <= 0); 3553#L20 call #t~ret3 := rec1(~j - 1);< 3469#rec1ENTRY ~i := #in~i; 3578#L12 assume !(~i <= 0); 3398#L14 call #t~ret0 := rec1(~i - 2);< 3433#rec1ENTRY [2021-10-21 20:21:43,168 INFO L793 eck$LassoCheckResult]: Loop: 3433#rec1ENTRY ~i := #in~i; 3569#L12 assume !(~i <= 0); 3397#L14 call #t~ret0 := rec1(~i - 2);< 3433#rec1ENTRY [2021-10-21 20:21:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:43,169 INFO L82 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2021-10-21 20:21:43,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:43,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717778886] [2021-10-21 20:21:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:43,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:43,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-21 20:21:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:43,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:21:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:43,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 20:21:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:43,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 20:21:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 20:21:43,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:43,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717778886] [2021-10-21 20:21:43,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717778886] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:43,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368823719] [2021-10-21 20:21:43,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:21:43,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:43,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,258 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 20:21:43,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:21:43,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 20:21:43,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-21 20:21:43,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368823719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:43,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:43,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-10-21 20:21:43,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142802014] [2021-10-21 20:21:43,469 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 20:21:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2021-10-21 20:21:43,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:43,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22562717] [2021-10-21 20:21:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:43,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:43,490 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:43,492 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:43,523 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:43,523 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:43,523 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:43,524 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:43,524 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:43,524 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,524 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:43,524 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:43,524 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2021-10-21 20:21:43,524 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:43,524 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:43,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,533 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,535 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,563 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:43,564 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:43,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,566 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-21 20:21:43,567 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:43,567 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:43,576 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:43,576 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:43,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:43,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,607 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,608 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:43,608 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:43,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-21 20:21:43,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:43,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,676 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-21 20:21:43,678 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:43,678 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:43,711 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:43,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:43,714 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:43,714 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:43,714 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:43,714 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:43,714 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:43,714 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,714 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:43,714 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:43,714 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2021-10-21 20:21:43,714 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:43,715 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:43,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:43,750 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:43,750 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:43,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,751 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-21 20:21:43,753 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 [2021-10-21 20:21:43,760 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:43,760 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:43,760 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:43,760 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:43,760 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:43,760 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:43,760 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:43,764 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:43,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Ended with exit code 0 [2021-10-21 20:21:43,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,787 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-21 20:21:43,800 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 [2021-10-21 20:21:43,807 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:43,807 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:43,808 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:43,808 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:43,808 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:43,808 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:43,808 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:43,810 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:43,811 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-21 20:21:43,811 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-21 20:21:43,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:43,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:43,813 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:43,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-21 20:21:43,816 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:43,816 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:43,816 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:43,816 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-10-21 20:21:43,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2021-10-21 20:21:43,835 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:43,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 20:21:43,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:44,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:44,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:44,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:44,315 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 [2021-10-21 20:21:44,316 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:21:44,381 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 348 states and 455 transitions. Complement of second has 14 states. [2021-10-21 20:21:44,382 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 [2021-10-21 20:21:44,382 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:21:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2021-10-21 20:21:44,383 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2021-10-21 20:21:44,383 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:44,383 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 20:21:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:44,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 20:21:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:44,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:44,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:44,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:44,942 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 [2021-10-21 20:21:44,942 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:21:45,009 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 348 states and 455 transitions. Complement of second has 14 states. [2021-10-21 20:21:45,009 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 [2021-10-21 20:21:45,010 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:21:45,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2021-10-21 20:21:45,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2021-10-21 20:21:45,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:45,010 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 20:21:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 20:21:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:45,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:45,499 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 [2021-10-21 20:21:45,499 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:21:45,597 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 485 states and 616 transitions. Complement of second has 16 states. [2021-10-21 20:21:45,600 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 [2021-10-21 20:21:45,601 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, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-21 20:21:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2021-10-21 20:21:45,601 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2021-10-21 20:21:45,603 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:45,603 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2021-10-21 20:21:45,604 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:45,604 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2021-10-21 20:21:45,605 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:45,605 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2021-10-21 20:21:45,614 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2021-10-21 20:21:45,623 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2021-10-21 20:21:45,623 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2021-10-21 20:21:45,623 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2021-10-21 20:21:45,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2021-10-21 20:21:45,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:45,625 INFO L681 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2021-10-21 20:21:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2021-10-21 20:21:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2021-10-21 20:21:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 195 states have (on average 1.1282051282051282) internal successors, (220), 211 states have internal predecessors, (220), 102 states have call successors, (104), 57 states have call predecessors, (104), 54 states have return successors, (132), 82 states have call predecessors, (132), 86 states have call successors, (132) [2021-10-21 20:21:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2021-10-21 20:21:45,646 INFO L704 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2021-10-21 20:21:45,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:45,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:21:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:21:45,648 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand has 10 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-21 20:21:45,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:45,733 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2021-10-21 20:21:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 20:21:45,734 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2021-10-21 20:21:45,740 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-10-21 20:21:45,742 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2021-10-21 20:21:45,742 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2021-10-21 20:21:45,743 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2021-10-21 20:21:45,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2021-10-21 20:21:45,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:45,743 INFO L681 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2021-10-21 20:21:45,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2021-10-21 20:21:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2021-10-21 20:21:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 50 states have (on average 1.12) internal successors, (56), 53 states have internal predecessors, (56), 22 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (28), 17 states have call predecessors, (28), 20 states have call successors, (28) [2021-10-21 20:21:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2021-10-21 20:21:45,750 INFO L704 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2021-10-21 20:21:45,750 INFO L587 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2021-10-21 20:21:45,750 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-21 20:21:45,750 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2021-10-21 20:21:45,751 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-10-21 20:21:45,751 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:45,751 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:45,752 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:45,752 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-21 20:21:45,752 INFO L791 eck$LassoCheckResult]: Stem: 6151#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; 6150#L25 call main_#t~ret6 := rec2(main_~x~0);< 6161#rec2ENTRY ~j := #in~j; 6208#L18 assume !(~j <= 0); 6205#L20 call #t~ret3 := rec1(~j - 1);< 6207#rec1ENTRY ~i := #in~i; 6206#L12 assume !(~i <= 0); 6180#L14 call #t~ret0 := rec1(~i - 2);< 6186#rec1ENTRY ~i := #in~i; 6183#L12 assume !(~i <= 0); 6179#L14 [2021-10-21 20:21:45,752 INFO L793 eck$LassoCheckResult]: Loop: 6179#L14 call #t~ret0 := rec1(~i - 2);< 6181#rec1ENTRY ~i := #in~i; 6183#L12 assume !(~i <= 0); 6179#L14 [2021-10-21 20:21:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:45,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2021-10-21 20:21:45,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:45,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472412091] [2021-10-21 20:21:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:45,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:45,767 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:45,771 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:45,772 INFO L82 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2021-10-21 20:21:45,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:45,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784907846] [2021-10-21 20:21:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:45,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:45,779 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:45,783 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2021-10-21 20:21:45,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:45,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422029361] [2021-10-21 20:21:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:45,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:45,793 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:45,801 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:45,836 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:45,836 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:45,836 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:45,837 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:45,837 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:45,837 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:45,837 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:45,837 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:45,837 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2021-10-21 20:21:45,837 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:45,837 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:45,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:45,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:45,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:45,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:45,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:45,884 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:45,884 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:45,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:45,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:45,888 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:45,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:45,892 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:45,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-21 20:21:45,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:45,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:45,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:45,960 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:45,962 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:45,962 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:45,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-21 20:21:51,575 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:51,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:51,578 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:51,578 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:51,578 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:51,578 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:51,579 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:51,579 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:51,579 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:51,579 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:51,579 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2021-10-21 20:21:51,579 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:51,579 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:51,579 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:51,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:51,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:51,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:51,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:51,631 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:51,631 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:51,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:51,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:51,632 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:51,642 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 [2021-10-21 20:21:51,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:51,652 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:51,652 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:51,652 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:51,652 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:51,653 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:51,653 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:51,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-21 20:21:51,664 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:51,676 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-21 20:21:51,676 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-21 20:21:51,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:51,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:51,677 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:51,679 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:51,679 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:51,680 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:51,680 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2021-10-21 20:21:51,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-10-21 20:21:51,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Ended with exit code 0 [2021-10-21 20:21:51,702 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 20:21:51,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:21:51,801 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 [2021-10-21 20:21:51,802 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:51,832 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 100 states and 124 transitions. Complement of second has 11 states. [2021-10-21 20:21:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:21:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-21 20:21:51,833 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2021-10-21 20:21:51,833 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:51,833 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2021-10-21 20:21:51,833 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:51,833 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-21 20:21:51,834 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:51,834 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2021-10-21 20:21:51,836 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-10-21 20:21:51,837 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2021-10-21 20:21:51,838 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2021-10-21 20:21:51,838 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2021-10-21 20:21:51,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2021-10-21 20:21:51,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:51,838 INFO L681 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2021-10-21 20:21:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2021-10-21 20:21:51,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-10-21 20:21:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 58 states have internal predecessors, (60), 23 states have call successors, (24), 16 states have call predecessors, (24), 15 states have return successors, (30), 17 states have call predecessors, (30), 21 states have call successors, (30) [2021-10-21 20:21:51,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2021-10-21 20:21:51,842 INFO L704 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2021-10-21 20:21:51,843 INFO L587 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2021-10-21 20:21:51,843 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-21 20:21:51,843 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2021-10-21 20:21:51,844 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2021-10-21 20:21:51,844 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 20:21:51,844 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 20:21:51,845 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:21:51,846 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 20:21:51,846 INFO L791 eck$LassoCheckResult]: Stem: 6407#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; 6405#L25 call main_#t~ret6 := rec2(main_~x~0);< 6418#rec2ENTRY ~j := #in~j; 6426#L18 assume !(~j <= 0); 6427#L20 call #t~ret3 := rec1(~j - 1);< 6445#rec1ENTRY ~i := #in~i; 6444#L12 assume !(~i <= 0); 6415#L14 call #t~ret0 := rec1(~i - 2);< 6430#rec1ENTRY ~i := #in~i; 6491#L12 assume !(~i <= 0); 6414#L14 call #t~ret0 := rec1(~i - 2);< 6434#rec1ENTRY ~i := #in~i; 6435#L12 assume ~i <= 0;#res := 0; 6494#rec1FINAL assume true; 6492#rec1EXIT >#27#return; 6424#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6480#rec1ENTRY ~i := #in~i; 6484#L12 assume ~i <= 0;#res := 0; 6482#rec1FINAL assume true; 6479#rec1EXIT >#29#return; 6419#L14-2 call #t~ret2 := rec1(#t~ret1);< 6420#rec1ENTRY ~i := #in~i; 6476#L12 assume ~i <= 0;#res := 0; 6475#rec1FINAL assume true; 6473#rec1EXIT >#31#return; 6408#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6417#rec1FINAL assume true; 6442#rec1EXIT >#27#return; 6409#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6421#rec1ENTRY [2021-10-21 20:21:51,846 INFO L793 eck$LassoCheckResult]: Loop: 6421#rec1ENTRY ~i := #in~i; 6490#L12 assume !(~i <= 0); 6413#L14 call #t~ret0 := rec1(~i - 2);< 6440#rec1ENTRY ~i := #in~i; 6429#L12 assume !(~i <= 0); 6416#L14 call #t~ret0 := rec1(~i - 2);< 6431#rec1ENTRY ~i := #in~i; 6428#L12 assume ~i <= 0;#res := 0; 6422#rec1FINAL assume true; 6423#rec1EXIT >#27#return; 6424#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6480#rec1ENTRY ~i := #in~i; 6484#L12 assume ~i <= 0;#res := 0; 6482#rec1FINAL assume true; 6479#rec1EXIT >#29#return; 6419#L14-2 call #t~ret2 := rec1(#t~ret1);< 6420#rec1ENTRY ~i := #in~i; 6476#L12 assume ~i <= 0;#res := 0; 6475#rec1FINAL assume true; 6473#rec1EXIT >#31#return; 6408#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6417#rec1FINAL assume true; 6442#rec1EXIT >#27#return; 6410#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6421#rec1ENTRY [2021-10-21 20:21:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2021-10-21 20:21:51,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:51,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930212302] [2021-10-21 20:21:51,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:51,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:51,855 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:51,861 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:51,862 INFO L82 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2021-10-21 20:21:51,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:51,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698943040] [2021-10-21 20:21:51,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:51,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:51,869 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 20:21:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 20:21:51,874 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 20:21:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:51,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2021-10-21 20:21:51,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:21:51,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187673546] [2021-10-21 20:21:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:21:51,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:21:51,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 20:21:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:21:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 20:21:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 20:21:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-10-21 20:21:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-21 20:21:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 20:21:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-10-21 20:21:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-10-21 20:21:51,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:21:51,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187673546] [2021-10-21 20:21:51,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187673546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:51,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749101772] [2021-10-21 20:21:51,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:21:51,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:21:51,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:51,968 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:21:51,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-21 20:21:52,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:21:52,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:21:52,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 20:21:52,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:52,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-21 20:21:52,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749101772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:21:52,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:21:52,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-10-21 20:21:52,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561589434] [2021-10-21 20:21:52,601 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:52,601 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:52,601 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:52,601 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:52,601 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 20:21:52,601 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:52,601 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:52,601 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:52,601 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2021-10-21 20:21:52,601 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:52,601 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:52,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,610 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,612 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,617 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,650 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:52,651 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 20:21:52,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:52,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:52,652 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:52,658 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:52,658 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:52,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-21 20:21:52,667 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:52,667 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:52,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Ended with exit code 0 [2021-10-21 20:21:52,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:52,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:52,686 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:52,700 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:52,700 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:52,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-10-21 20:21:52,709 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:52,709 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:52,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:52,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:52,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:52,728 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:52,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-21 20:21:52,729 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:52,729 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:52,737 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 20:21:52,737 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 20:21:52,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2021-10-21 20:21:52,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:52,757 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:52,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-21 20:21:52,759 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 20:21:52,759 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:52,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Ended with exit code 0 [2021-10-21 20:21:52,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:52,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:52,786 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:52,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-10-21 20:21:52,788 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 20:21:52,788 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 20:21:52,815 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 20:21:52,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2021-10-21 20:21:52,838 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 20:21:52,838 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 20:21:52,839 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 20:21:52,839 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 20:21:52,839 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 20:21:52,839 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:52,839 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 20:21:52,839 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 20:21:52,839 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2021-10-21 20:21:52,839 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 20:21:52,839 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 20:21:52,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,841 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,842 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 20:21:52,871 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 20:21:52,871 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 20:21:52,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:52,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:52,872 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:52,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-21 20:21:52,873 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 [2021-10-21 20:21:52,880 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:52,880 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:52,880 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:52,880 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:52,880 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:52,881 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:52,881 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:52,908 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:52,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:52,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:52,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:52,936 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:52,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-21 20:21:52,937 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 20:21:52,944 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:52,944 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:52,944 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:52,945 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:52,945 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:52,949 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:52,949 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:52,980 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 20:21:53,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2021-10-21 20:21:53,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:53,006 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:53,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-21 20:21:53,007 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 [2021-10-21 20:21:53,014 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 20:21:53,014 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 20:21:53,014 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 20:21:53,014 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 20:21:53,014 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 20:21:53,015 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 20:21:53,015 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 20:21:53,040 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 20:21:53,050 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 20:21:53,050 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 20:21:53,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 20:21:53,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:21:53,051 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 20:21:53,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-21 20:21:53,052 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 20:21:53,052 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 20:21:53,052 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 20:21:53,052 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-10-21 20:21:53,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2021-10-21 20:21:53,071 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 20:21:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 20:21:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:53,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:53,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 20:21:53,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 20:21:53,841 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-21 20:21:53,841 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:53,898 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 100 states and 122 transitions. Complement of second has 7 states. [2021-10-21 20:21:53,899 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 [2021-10-21 20:21:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-10-21 20:21:53,900 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2021-10-21 20:21:53,900 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:53,900 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 20:21:53,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:53,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 20:21:53,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:54,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 20:21:54,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 20:21:54,593 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-21 20:21:54,594 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:54,656 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 100 states and 122 transitions. Complement of second has 7 states. [2021-10-21 20:21:54,658 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 [2021-10-21 20:21:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-10-21 20:21:54,658 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2021-10-21 20:21:54,658 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:54,658 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 20:21:54,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:54,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 20:21:54,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:55,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 20:21:55,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 20:21:55,317 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-21 20:21:55,318 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:55,566 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 257 states and 303 transitions. Complement of second has 31 states. [2021-10-21 20:21:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2021-10-21 20:21:55,568 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2021-10-21 20:21:55,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:55,572 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 20:21:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:21:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 20:21:55,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:21:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-21 20:21:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:21:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-21 20:21:56,292 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2021-10-21 20:21:56,292 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:56,722 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Result 409 states and 515 transitions. Complement of second has 80 states. [2021-10-21 20:21:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2021-10-21 20:21:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-10-21 20:21:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2021-10-21 20:21:56,725 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2021-10-21 20:21:56,726 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:56,726 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2021-10-21 20:21:56,727 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:56,727 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2021-10-21 20:21:56,728 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 20:21:56,728 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2021-10-21 20:21:56,735 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2021-10-21 20:21:56,739 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2021-10-21 20:21:56,739 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2021-10-21 20:21:56,740 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2021-10-21 20:21:56,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2021-10-21 20:21:56,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 20:21:56,740 INFO L681 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2021-10-21 20:21:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2021-10-21 20:21:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2021-10-21 20:21:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 126 states have (on average 1.126984126984127) internal successors, (142), 138 states have internal predecessors, (142), 51 states have call successors, (52), 34 states have call predecessors, (52), 39 states have return successors, (76), 43 states have call predecessors, (76), 49 states have call successors, (76) [2021-10-21 20:21:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2021-10-21 20:21:56,752 INFO L704 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2021-10-21 20:21:56,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:21:56,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:21:56,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:21:56,752 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-21 20:21:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:21:56,790 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-10-21 20:21:56,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:21:56,790 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2021-10-21 20:21:56,791 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-21 20:21:56,791 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2021-10-21 20:21:56,791 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-21 20:21:56,792 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-21 20:21:56,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-21 20:21:56,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 20:21:56,792 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:21:56,792 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:21:56,792 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:21:56,792 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-21 20:21:56,792 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:21:56,792 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-21 20:21:56,793 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-21 20:21:56,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.10 08:21:56 BoogieIcfgContainer [2021-10-21 20:21:56,798 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-21 20:21:56,799 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:21:56,799 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:21:56,799 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:21:56,800 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:21:32" (3/4) ... [2021-10-21 20:21:56,802 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-21 20:21:56,802 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:21:56,804 INFO L168 Benchmark]: Toolchain (without parser) took 24963.38 ms. Allocated memory was 115.3 MB in the beginning and 169.9 MB in the end (delta: 54.5 MB). Free memory was 85.8 MB in the beginning and 101.6 MB in the end (delta: -15.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:56,804 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 115.3 MB. Free memory is still 68.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:21:56,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.62 ms. Allocated memory is still 115.3 MB. Free memory was 85.8 MB in the beginning and 92.3 MB in the end (delta: -6.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:56,805 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.41 ms. Allocated memory is still 115.3 MB. Free memory was 91.9 MB in the beginning and 90.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:21:56,805 INFO L168 Benchmark]: Boogie Preprocessor took 25.03 ms. Allocated memory is still 115.3 MB. Free memory was 90.7 MB in the beginning and 89.8 MB in the end (delta: 914.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:56,806 INFO L168 Benchmark]: RCFGBuilder took 257.28 ms. Allocated memory is still 115.3 MB. Free memory was 89.8 MB in the beginning and 81.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:56,806 INFO L168 Benchmark]: BuchiAutomizer took 24402.82 ms. Allocated memory was 115.3 MB in the beginning and 169.9 MB in the end (delta: 54.5 MB). Free memory was 81.4 MB in the beginning and 101.6 MB in the end (delta: -20.2 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. [2021-10-21 20:21:56,806 INFO L168 Benchmark]: Witness Printer took 3.72 ms. Allocated memory is still 169.9 MB. Free memory is still 101.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:21:56,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 115.3 MB. Free memory is still 68.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 229.62 ms. Allocated memory is still 115.3 MB. Free memory was 85.8 MB in the beginning and 92.3 MB in the end (delta: -6.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.41 ms. Allocated memory is still 115.3 MB. Free memory was 91.9 MB in the beginning and 90.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.03 ms. Allocated memory is still 115.3 MB. Free memory was 90.7 MB in the beginning and 89.8 MB in the end (delta: 914.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 257.28 ms. Allocated memory is still 115.3 MB. Free memory was 89.8 MB in the beginning and 81.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 24402.82 ms. Allocated memory was 115.3 MB in the beginning and 169.9 MB in the end (delta: 54.5 MB). Free memory was 81.4 MB in the beginning and 101.6 MB in the end (delta: -20.2 MB). Peak memory consumption was 34.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.72 ms. Allocated memory is still 169.9 MB. Free memory is still 101.6 MB. There was no memory consumed. 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 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@bb70f59 and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 24.3s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 15.5s. Construction of modules took 0.8s. Büchi inclusion checks took 7.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 216.8ms AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 288 SDtfs, 325 SDslu, 551 SDs, 0 SdLazy, 1046 SolverSat, 301 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 830.9ms Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf97 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf92 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 58ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 10.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-21 20:21:56,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-21 20:21:57,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-21 20:21:57,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-10-21 20:21:57,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-21 20:21:57,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_def2a3a6-da70-4b7d-9d85-3e4c66e1a1b4/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...