./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF --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 727b654585befeb7272249307a5de272b17c4e2d2d1afa67fd11f4eb185d7508 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:28:49,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:28:49,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:28:49,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:28:49,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:28:49,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:28:49,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:28:49,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:28:49,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:28:49,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:28:49,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:28:49,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:28:49,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:28:49,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:28:49,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:28:49,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:28:49,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:28:49,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:28:49,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:28:49,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:28:49,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:28:49,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:28:49,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:28:49,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:28:49,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:28:49,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:28:49,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:28:49,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:28:49,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:28:49,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:28:49,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:28:49,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:28:49,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:28:49,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:28:49,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:28:49,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:28:49,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:28:49,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:28:49,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:28:49,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:28:49,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:28:49,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-20 07:28:49,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:28:49,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:28:49,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:28:49,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:28:49,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:28:49,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:28:49,567 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:28:49,567 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-20 07:28:49,567 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-20 07:28:49,568 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-20 07:28:49,569 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-20 07:28:49,569 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-20 07:28:49,569 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-20 07:28:49,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:28:49,570 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:28:49,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:28:49,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:28:49,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-20 07:28:49,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-20 07:28:49,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-20 07:28:49,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:28:49,571 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-20 07:28:49,572 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:28:49,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-20 07:28:49,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:28:49,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:28:49,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:28:49,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:28:49,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:28:49,576 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-20 07:28:49,577 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_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 727b654585befeb7272249307a5de272b17c4e2d2d1afa67fd11f4eb185d7508 [2021-11-20 07:28:49,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:28:49,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:28:49,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:28:49,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:28:49,963 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:28:49,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2021-11-20 07:28:50,056 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/data/6e00a2252/0e1870647ddf40d19e3a5e5e27091679/FLAG5e8fef104 [2021-11-20 07:28:50,593 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:28:50,594 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2021-11-20 07:28:50,605 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/data/6e00a2252/0e1870647ddf40d19e3a5e5e27091679/FLAG5e8fef104 [2021-11-20 07:28:50,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/data/6e00a2252/0e1870647ddf40d19e3a5e5e27091679 [2021-11-20 07:28:50,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:28:50,959 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:28:50,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:28:50,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:28:50,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:28:50,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5573cf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:50, skipping insertion in model container [2021-11-20 07:28:50,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:28:50" (1/1) ... [2021-11-20 07:28:50,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:28:50,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:28:51,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:28:51,201 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:28:51,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:28:51,225 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:28:51,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51 WrapperNode [2021-11-20 07:28:51,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:28:51,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:28:51,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:28:51,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:28:51,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,257 INFO L137 Inliner]: procedures = 6, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2021-11-20 07:28:51,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:28:51,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:28:51,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:28:51,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:28:51,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:28:51,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:28:51,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:28:51,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:28:51,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (1/1) ... [2021-11-20 07:28:51,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:51,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:51,311 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:51,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-20 07:28:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-20 07:28:51,350 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-20 07:28:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-11-20 07:28:51,350 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-11-20 07:28:51,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:28:51,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:28:51,406 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:28:51,408 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:28:51,508 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:28:51,515 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:28:51,516 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 07:28:51,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:28:51 BoogieIcfgContainer [2021-11-20 07:28:51,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:28:51,519 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-20 07:28:51,519 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-20 07:28:51,537 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-20 07:28:51,538 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-20 07:28:51,538 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 07:28:50" (1/3) ... [2021-11-20 07:28:51,540 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@30b78d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 07:28:51, skipping insertion in model container [2021-11-20 07:28:51,540 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-20 07:28:51,540 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:28:51" (2/3) ... [2021-11-20 07:28:51,540 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@30b78d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 07:28:51, skipping insertion in model container [2021-11-20 07:28:51,540 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-20 07:28:51,541 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:28:51" (3/3) ... [2021-11-20 07:28:51,542 INFO L388 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a.c [2021-11-20 07:28:51,630 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-20 07:28:51,630 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-20 07:28:51,630 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-20 07:28:51,630 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-20 07:28:51,630 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-20 07:28:51,631 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-20 07:28:51,631 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-20 07:28:51,631 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-20 07:28:51,667 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:28:51,707 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-11-20 07:28:51,714 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 07:28:51,714 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 07:28:51,722 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-20 07:28:51,722 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:28:51,722 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-20 07:28:51,723 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:28:51,728 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-11-20 07:28:51,728 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 07:28:51,729 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 07:28:51,729 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-20 07:28:51,730 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:28:51,736 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 14#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 13#L26true call main_#t~ret5#1 := g(main_~x~0#1);< 15#gENTRYtrue [2021-11-20 07:28:51,738 INFO L793 eck$LassoCheckResult]: Loop: 15#gENTRYtrue ~x := #in~x; 7#L19true assume !(~x <= 0); 12#L20true call #t~ret2 := f(~x - 1);< 16#fENTRYtrue ~x := #in~x; 19#L13true assume !(~x <= 0); 10#L14true call #t~ret0 := g(~x);< 15#gENTRYtrue [2021-11-20 07:28:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash 47743, now seen corresponding path program 1 times [2021-11-20 07:28:51,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:51,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893578650] [2021-11-20 07:28:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:51,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:51,858 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:28:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:51,887 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:28:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1158065693, now seen corresponding path program 1 times [2021-11-20 07:28:51,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:51,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630741636] [2021-11-20 07:28:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:51,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:51,922 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:28:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:51,944 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:28:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:51,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1788538341, now seen corresponding path program 1 times [2021-11-20 07:28:51,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:51,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432901768] [2021-11-20 07:28:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:51,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:51,971 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:28:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:51,991 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:28:52,191 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 07:28:52,192 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 07:28:52,192 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 07:28:52,192 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 07:28:52,193 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-20 07:28:52,193 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,193 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 07:28:52,193 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 07:28:52,193 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2021-11-20 07:28:52,194 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 07:28:52,194 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 07:28:52,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,290 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 07:28:52,291 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-20 07:28:52,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:52,307 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 07:28:52,308 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 07:28:52,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-20 07:28:52,343 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-20 07:28:52,344 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f_#res=0} Honda state: {f_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-20 07:28:52,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,383 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:52,389 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 07:28:52,389 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 07:28:52,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-20 07:28:52,411 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-20 07:28:52,411 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret2=0} Honda state: {g_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-20 07:28:52,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:52,458 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 07:28:52,458 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 07:28:52,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-20 07:28:52,491 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-20 07:28:52,491 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret3=0} Honda state: {g_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-20 07:28:52,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:52,536 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 07:28:52,536 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 07:28:52,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-20 07:28:52,559 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-20 07:28:52,559 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-20 07:28:52,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,598 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:52,605 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-20 07:28:52,605 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 07:28:52,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-20 07:28:52,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:52,687 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-20 07:28:52,687 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-20 07:28:52,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-20 07:28:52,795 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-20 07:28:52,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,803 INFO L210 LassoAnalysis]: Preferences: [2021-11-20 07:28:52,803 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-20 07:28:52,803 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-20 07:28:52,803 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-20 07:28:52,803 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-20 07:28:52,803 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,803 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-20 07:28:52,804 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-20 07:28:52,804 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2021-11-20 07:28:52,804 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-20 07:28:52,804 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-20 07:28:52,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,816 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,852 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-20 07:28:52,913 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-20 07:28:52,918 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-20 07:28:52,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:52,930 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 07:28:52,940 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 07:28:52,940 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 07:28:52,941 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 07:28:52,941 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 07:28:52,941 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 07:28:52,943 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 07:28:52,943 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 07:28:52,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-20 07:28:52,955 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-20 07:28:52,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:52,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:52,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:52,995 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:53,027 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 07:28:53,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-20 07:28:53,037 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 07:28:53,037 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 07:28:53,037 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 07:28:53,037 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 07:28:53,037 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 07:28:53,040 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 07:28:53,041 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 07:28:53,058 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-20 07:28:53,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:53,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:53,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:53,096 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:53,098 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 07:28:53,107 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 07:28:53,108 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 07:28:53,108 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 07:28:53,108 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 07:28:53,108 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 07:28:53,109 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 07:28:53,109 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 07:28:53,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-20 07:28:53,131 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-20 07:28:53,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:53,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:53,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:53,178 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:53,187 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 07:28:53,196 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 07:28:53,197 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 07:28:53,197 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 07:28:53,197 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 07:28:53,197 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 07:28:53,198 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 07:28:53,198 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 07:28:53,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-20 07:28:53,218 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-20 07:28:53,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:53,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:53,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:53,258 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:53,268 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 07:28:53,277 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 07:28:53,277 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 07:28:53,277 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 07:28:53,277 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 07:28:53,278 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 07:28:53,280 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 07:28:53,280 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 07:28:53,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-20 07:28:53,298 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-20 07:28:53,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:53,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:53,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:53,337 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:53,343 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 07:28:53,353 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 07:28:53,353 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 07:28:53,353 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 07:28:53,353 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 07:28:53,353 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 07:28:53,354 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 07:28:53,355 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 07:28:53,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-20 07:28:53,370 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-20 07:28:53,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:53,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:53,417 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:53,428 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-20 07:28:53,437 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-20 07:28:53,437 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-20 07:28:53,438 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-20 07:28:53,438 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-20 07:28:53,438 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-20 07:28:53,440 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-20 07:28:53,440 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-20 07:28:53,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-20 07:28:53,458 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-20 07:28:53,463 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-20 07:28:53,464 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-20 07:28:53,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-20 07:28:53,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:28:53,467 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-20 07:28:53,472 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-20 07:28:53,472 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-20 07:28:53,472 INFO L513 LassoAnalysis]: Proved termination. [2021-11-20 07:28:53,473 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2021-11-20 07:28:53,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-20 07:28:53,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:53,515 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-20 07:28:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:28:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:53,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:28:53,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:28:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:28:53,722 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2021-11-20 07:28:53,723 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:53,876 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5). Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 63 states and 82 transitions. Complement of second has 24 states. [2021-11-20 07:28:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2021-11-20 07:28:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:28:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2021-11-20 07:28:53,893 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 3 letters. Loop has 6 letters. [2021-11-20 07:28:53,895 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 07:28:53,901 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 9 letters. Loop has 6 letters. [2021-11-20 07:28:53,901 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 07:28:53,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 3 letters. Loop has 12 letters. [2021-11-20 07:28:53,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-20 07:28:53,903 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2021-11-20 07:28:53,909 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-11-20 07:28:53,922 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 46 states and 60 transitions. [2021-11-20 07:28:53,926 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2021-11-20 07:28:53,927 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2021-11-20 07:28:53,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 60 transitions. [2021-11-20 07:28:53,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-20 07:28:53,930 INFO L681 BuchiCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-11-20 07:28:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 60 transitions. [2021-11-20 07:28:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-20 07:28:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-20 07:28:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-11-20 07:28:53,968 INFO L704 BuchiCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-11-20 07:28:53,969 INFO L587 BuchiCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-11-20 07:28:53,969 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-20 07:28:53,969 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 45 states and 57 transitions. [2021-11-20 07:28:53,971 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-11-20 07:28:53,972 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 07:28:53,972 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 07:28:53,973 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:53,974 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:53,974 INFO L791 eck$LassoCheckResult]: Stem: 174#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 175#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 185#L26 call main_#t~ret5#1 := g(main_~x~0#1);< 191#gENTRY ~x := #in~x; 184#L19 assume !(~x <= 0); 168#L20 call #t~ret2 := f(~x - 1);< 190#fENTRY ~x := #in~x; 200#L13 assume !(~x <= 0); 181#L14 call #t~ret0 := g(~x);< 188#gENTRY ~x := #in~x; 180#L19 assume ~x <= 0;#res := 0; 182#gFINAL assume true; 186#gEXIT >#27#return; 176#L14-1 [2021-11-20 07:28:53,974 INFO L793 eck$LassoCheckResult]: Loop: 176#L14-1 call #t~ret1 := g(1 + ~x);< 179#gENTRY ~x := #in~x; 204#L19 assume !(~x <= 0); 177#L20 call #t~ret2 := f(~x - 1);< 203#fENTRY ~x := #in~x; 201#L13 assume !(~x <= 0); 187#L14 call #t~ret0 := g(~x);< 179#gENTRY ~x := #in~x; 204#L19 assume ~x <= 0;#res := 0; 199#gFINAL assume true; 202#gEXIT >#27#return; 176#L14-1 [2021-11-20 07:28:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1510789928, now seen corresponding path program 1 times [2021-11-20 07:28:53,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:53,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872914674] [2021-11-20 07:28:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:53,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:54,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 07:28:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:28:54,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872914674] [2021-11-20 07:28:54,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872914674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:54,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:54,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:28:54,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867045954] [2021-11-20 07:28:54,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:54,049 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-11-20 07:28:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:54,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1553130012, now seen corresponding path program 1 times [2021-11-20 07:28:54,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:54,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214678494] [2021-11-20 07:28:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:54,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-20 07:28:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:28:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:28:54,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:28:54,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214678494] [2021-11-20 07:28:54,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214678494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:28:54,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:28:54,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:28:54,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709255406] [2021-11-20 07:28:54,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:28:54,103 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-11-20 07:28:54,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:28:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:28:54,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:28:54,115 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. cyclomatic complexity: 14 Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:28:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:28:54,193 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-11-20 07:28:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:28:54,195 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 60 transitions. [2021-11-20 07:28:54,203 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-11-20 07:28:54,210 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 45 states and 56 transitions. [2021-11-20 07:28:54,210 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 31 [2021-11-20 07:28:54,210 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2021-11-20 07:28:54,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 56 transitions. [2021-11-20 07:28:54,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-20 07:28:54,211 INFO L681 BuchiCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-20 07:28:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 56 transitions. [2021-11-20 07:28:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-20 07:28:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2021-11-20 07:28:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-20 07:28:54,233 INFO L704 BuchiCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-20 07:28:54,233 INFO L587 BuchiCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-20 07:28:54,233 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-20 07:28:54,234 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 45 states and 56 transitions. [2021-11-20 07:28:54,236 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-11-20 07:28:54,236 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-20 07:28:54,236 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-20 07:28:54,240 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:54,240 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:28:54,241 INFO L791 eck$LassoCheckResult]: Stem: 297#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 298#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet4#1, main_#t~ret5#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet4#1;havoc main_#t~nondet4#1; 296#L26 call main_#t~ret5#1 := g(main_~x~0#1);< 305#gENTRY ~x := #in~x; 295#L19 assume !(~x <= 0); 284#L20 call #t~ret2 := f(~x - 1);< 304#fENTRY ~x := #in~x; 314#L13 assume !(~x <= 0); 294#L14 call #t~ret0 := g(~x);< 302#gENTRY ~x := #in~x; 293#L19 assume !(~x <= 0); 280#L20 call #t~ret2 := f(~x - 1);< 303#fENTRY ~x := #in~x; 306#L13 assume ~x <= 0;#res := 0; 279#fFINAL assume true; 281#fEXIT >#31#return; 286#L20-1 call #t~ret3 := f(~x - 2);< 312#fENTRY ~x := #in~x; 323#L13 assume ~x <= 0;#res := 0; 322#fFINAL assume true; 321#fEXIT >#33#return; 313#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 299#gFINAL assume true; 301#gEXIT >#27#return; 289#L14-1 [2021-11-20 07:28:54,241 INFO L793 eck$LassoCheckResult]: Loop: 289#L14-1 call #t~ret1 := g(1 + ~x);< 292#gENTRY ~x := #in~x; 320#L19 assume !(~x <= 0); 291#L20 call #t~ret2 := f(~x - 1);< 317#fENTRY ~x := #in~x; 315#L13 assume !(~x <= 0); 300#L14 call #t~ret0 := g(~x);< 292#gENTRY ~x := #in~x; 320#L19 assume !(~x <= 0); 291#L20 call #t~ret2 := f(~x - 1);< 317#fENTRY ~x := #in~x; 315#L13 assume ~x <= 0;#res := 0; 316#fFINAL assume true; 319#fEXIT >#31#return; 290#L20-1 call #t~ret3 := f(~x - 2);< 317#fENTRY ~x := #in~x; 315#L13 assume ~x <= 0;#res := 0; 316#fFINAL assume true; 319#fEXIT >#33#return; 313#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 299#gFINAL assume true; 301#gEXIT >#27#return; 289#L14-1 [2021-11-20 07:28:54,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1263731607, now seen corresponding path program 1 times [2021-11-20 07:28:54,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:54,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479476384] [2021-11-20 07:28:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:54,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:54,265 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:28:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:54,299 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:28:54,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1714809691, now seen corresponding path program 1 times [2021-11-20 07:28:54,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:54,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244394964] [2021-11-20 07:28:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:54,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:54,314 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:28:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:54,334 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:28:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:28:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash 790919793, now seen corresponding path program 1 times [2021-11-20 07:28:54,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:28:54,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676486537] [2021-11-20 07:28:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:28:54,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:28:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:54,353 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:28:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:28:54,377 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:28:55,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:28:55,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 07:28:55 BoogieIcfgContainer [2021-11-20 07:28:55,386 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-20 07:28:55,386 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:28:55,386 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:28:55,387 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:28:55,387 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:28:51" (3/4) ... [2021-11-20 07:28:55,390 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-11-20 07:28:55,423 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 07:28:55,423 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:28:55,424 INFO L158 Benchmark]: Toolchain (without parser) took 4464.78ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 71.8MB in the beginning and 94.4MB in the end (delta: -22.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:28:55,424 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 113.2MB. Free memory is still 88.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:28:55,425 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.98ms. Allocated memory is still 113.2MB. Free memory was 71.6MB in the beginning and 89.6MB in the end (delta: -18.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 07:28:55,425 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.90ms. Allocated memory is still 113.2MB. Free memory was 89.6MB in the beginning and 88.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:28:55,425 INFO L158 Benchmark]: Boogie Preprocessor took 14.48ms. Allocated memory is still 113.2MB. Free memory was 88.6MB in the beginning and 87.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:28:55,426 INFO L158 Benchmark]: RCFGBuilder took 244.37ms. Allocated memory is still 113.2MB. Free memory was 87.5MB in the beginning and 78.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:28:55,426 INFO L158 Benchmark]: BuchiAutomizer took 3867.07ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 78.2MB in the beginning and 96.4MB in the end (delta: -18.3MB). Peak memory consumption was 61.3MB. Max. memory is 16.1GB. [2021-11-20 07:28:55,427 INFO L158 Benchmark]: Witness Printer took 36.79ms. Allocated memory is still 136.3MB. Free memory was 96.4MB in the beginning and 94.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:28:55,429 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 113.2MB. Free memory is still 88.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 264.98ms. Allocated memory is still 113.2MB. Free memory was 71.6MB in the beginning and 89.6MB in the end (delta: -18.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.90ms. Allocated memory is still 113.2MB. Free memory was 89.6MB in the beginning and 88.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 14.48ms. Allocated memory is still 113.2MB. Free memory was 88.6MB in the beginning and 87.5MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 244.37ms. Allocated memory is still 113.2MB. Free memory was 87.5MB in the beginning and 78.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 3867.07ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 78.2MB in the beginning and 96.4MB in the end (delta: -18.3MB). Peak memory consumption was 61.3MB. Max. memory is 16.1GB. * Witness Printer took 36.79ms. Allocated memory is still 136.3MB. Free memory was 96.4MB in the beginning and 94.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 7 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 45 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.7s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 3.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 45 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 72 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 44 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 81 IncrementalHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 28 mSDtfsCounter, 81 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 36ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 14]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@166af5b5=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7e775a5f=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4efa9a73=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@573cdb98=0, \result=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6390594d=0, \old(x)=1, x=1, x=0, \result=0, \old(x)=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7c5bd5e9=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L25] int x = __VERIFIER_nondet_int(); [L26] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) Loop: [L14] CALL g(x + 1) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-11-20 07:28:55,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f8fd336-b96f-425f-8a6d-0be53fbe4821/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)