./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD --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 32bit --witnessprinter.graph.data.programhash be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:07:02,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:07:02,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:07:02,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:07:02,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:07:02,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:07:02,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:07:02,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:07:02,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:07:02,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:07:02,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:07:02,845 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:07:02,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:07:02,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:07:02,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:07:02,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:07:02,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:07:02,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:07:02,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:07:02,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:07:02,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:07:02,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:07:02,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:07:02,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:07:02,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:07:02,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:07:02,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:07:02,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:07:02,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:07:02,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:07:02,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:07:02,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:07:02,897 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:07:02,898 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:07:02,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:07:02,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:07:02,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:07:02,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:07:02,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:07:02,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:07:02,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:07:02,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-28 23:07:02,948 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:07:02,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:07:02,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:07:02,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:07:02,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:07:02,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:07:02,951 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:07:02,951 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 23:07:02,951 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 23:07:02,951 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 23:07:02,951 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 23:07:02,952 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 23:07:02,952 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 23:07:02,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:07:02,952 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:07:02,953 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:07:02,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:07:02,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:07:02,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:07:02,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 23:07:02,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 23:07:02,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 23:07:02,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:07:02,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:07:02,954 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 23:07:02,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:07:02,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 23:07:02,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:07:02,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:07:02,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:07:02,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:07:02,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:07:02,957 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 23:07:02,957 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_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be0a584ba9648c80e7a0523ff51ba530f1926c55cecd3c62f2cee05fbbff42e3 [2021-10-28 23:07:03,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:07:03,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:07:03,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:07:03,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:07:03,301 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:07:03,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/recursive/Fibonacci03.c [2021-10-28 23:07:03,363 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/data/8829712be/1b5e0a4230464b2ba849c008b4012f90/FLAG1060a40e5 [2021-10-28 23:07:03,916 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:07:03,916 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/sv-benchmarks/c/recursive/Fibonacci03.c [2021-10-28 23:07:03,928 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/data/8829712be/1b5e0a4230464b2ba849c008b4012f90/FLAG1060a40e5 [2021-10-28 23:07:04,295 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/data/8829712be/1b5e0a4230464b2ba849c008b4012f90 [2021-10-28 23:07:04,299 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:07:04,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:07:04,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:07:04,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:07:04,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:07:04,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@719743c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04, skipping insertion in model container [2021-10-28 23:07:04,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:07:04,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:07:04,565 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2021-10-28 23:07:04,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:07:04,576 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:07:04,590 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/sv-benchmarks/c/recursive/Fibonacci03.c[788,801] [2021-10-28 23:07:04,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:07:04,604 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:07:04,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04 WrapperNode [2021-10-28 23:07:04,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:07:04,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:07:04,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:07:04,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:07:04,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:07:04,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:07:04,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:07:04,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:07:04,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:07:04,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:07:04,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:07:04,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:07:04,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (1/1) ... [2021-10-28 23:07:04,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:04,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:04,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:04,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 23:07:04,742 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-10-28 23:07:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-10-28 23:07:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:07:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:07:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:07:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:07:04,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:07:05,003 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 23:07:05,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:07:05 BoogieIcfgContainer [2021-10-28 23:07:05,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:07:05,007 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 23:07:05,007 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 23:07:05,010 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 23:07:05,020 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:07:05,020 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 11:07:04" (1/3) ... [2021-10-28 23:07:05,021 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@64800d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:07:05, skipping insertion in model container [2021-10-28 23:07:05,022 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:07:05,022 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:07:04" (2/3) ... [2021-10-28 23:07:05,022 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@64800d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:07:05, skipping insertion in model container [2021-10-28 23:07:05,022 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:07:05,023 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:07:05" (3/3) ... [2021-10-28 23:07:05,024 INFO L389 chiAutomizerObserver]: Analyzing ICFG Fibonacci03.c [2021-10-28 23:07:05,102 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 23:07:05,102 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 23:07:05,103 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 23:07:05,103 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 23:07:05,103 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 23:07:05,103 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 23:07:05,103 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 23:07:05,103 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 23:07:05,134 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:07:05,159 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:07:05,160 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:07:05,160 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:07:05,167 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-28 23:07:05,167 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 23:07:05,167 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 23:07:05,167 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:07:05,172 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:07:05,172 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:07:05,173 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:07:05,173 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-28 23:07:05,174 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 23:07:05,182 INFO L791 eck$LassoCheckResult]: Stem: 7#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 14#L-1true havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 11#L29true assume !(main_~x~0 > 46); 15#L32true call main_#t~ret10 := fibonacci(main_~x~0);< 5#fibonacciENTRYtrue [2021-10-28 23:07:05,182 INFO L793 eck$LassoCheckResult]: Loop: 5#fibonacciENTRYtrue ~n := #in~n; 6#L17true assume !(~n < 1); 19#L19true assume !(1 == ~n); 18#L22true call #t~ret7 := fibonacci(~n - 1);< 5#fibonacciENTRYtrue [2021-10-28 23:07:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1325876, now seen corresponding path program 1 times [2021-10-28 23:07:05,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:05,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753958588] [2021-10-28 23:07:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:05,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:05,341 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:07:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:05,403 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:07:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 1 times [2021-10-28 23:07:05,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:05,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455967964] [2021-10-28 23:07:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:05,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:05,420 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:07:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:05,437 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:07:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash 408654161, now seen corresponding path program 1 times [2021-10-28 23:07:05,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:05,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971654111] [2021-10-28 23:07:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:05,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:05,476 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:07:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:05,517 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:07:05,691 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:05,692 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:05,692 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:05,692 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:05,692 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:07:05,693 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:05,693 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:05,693 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:05,694 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration1_Loop [2021-10-28 23:07:05,694 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:05,694 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:05,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:05,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:05,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:05,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:05,741 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:05,801 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:05,802 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:07:05,804 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:05,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:05,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 23:07:05,823 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:05,824 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:05,854 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:05,855 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:05,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:05,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:05,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:05,896 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:05,897 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:05,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 23:07:05,911 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:05,911 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:05,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-10-28 23:07:05,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:05,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:05,952 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:05,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:05,968 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:05,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 23:07:05,995 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:05,995 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:06,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-10-28 23:07:06,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:06,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:06,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 23:07:06,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:06,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:06,039 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:06,039 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:06,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:06,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:06,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:06,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 23:07:06,072 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:06,073 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:06,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:06,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:06,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:06,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 23:07:06,118 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:07:06,118 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:06,188 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:07:06,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-10-28 23:07:06,194 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:06,194 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:06,194 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:06,194 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:06,194 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:07:06,195 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,195 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:06,195 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:06,195 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration1_Loop [2021-10-28 23:07:06,195 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:06,195 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:06,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:06,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:06,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:06,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:06,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:06,265 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:06,270 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:07:06,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:06,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:06,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 23:07:06,288 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:06,297 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:06,298 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:06,298 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:06,298 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:06,298 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:06,300 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:06,301 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:06,316 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:06,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-10-28 23:07:06,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:06,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:06,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 23:07:06,345 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:06,352 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:06,352 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:06,352 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:06,352 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:06,353 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:06,354 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:06,354 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:06,367 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:06,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:06,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:06,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:06,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 23:07:06,395 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:06,403 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:06,403 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:06,403 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:06,403 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:06,403 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:06,404 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:06,404 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:06,435 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:06,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:06,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:06,461 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:06,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 23:07:06,466 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:06,473 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:06,473 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:06,474 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:06,474 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:06,474 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:06,475 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:06,475 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:06,476 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:06,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:06,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:06,498 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:06,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 23:07:06,502 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:06,509 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:06,509 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:06,510 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:06,510 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:06,510 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:06,511 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:06,511 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:06,526 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:07:06,530 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:07:06,530 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:07:06,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:06,567 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:06,623 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:07:06,623 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:07:06,624 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:07:06,624 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-10-28 23:07:06,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 23:07:06,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:06,661 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:07:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:07:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:07:06,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:07:06,837 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:07:06,838 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:06,940 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 51 states and 63 transitions. Complement of second has 12 states. [2021-10-28 23:07:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:07:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-10-28 23:07:06,945 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2021-10-28 23:07:06,947 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:06,947 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2021-10-28 23:07:06,947 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:06,948 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2021-10-28 23:07:06,948 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:06,949 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 63 transitions. [2021-10-28 23:07:06,954 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:07:06,960 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 26 states and 35 transitions. [2021-10-28 23:07:06,962 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2021-10-28 23:07:06,962 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2021-10-28 23:07:06,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2021-10-28 23:07:06,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:07:06,963 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-10-28 23:07:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2021-10-28 23:07:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-10-28 23:07:06,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 23:07:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-10-28 23:07:06,996 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-10-28 23:07:06,996 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-10-28 23:07:06,996 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 23:07:06,996 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 27 transitions. [2021-10-28 23:07:06,997 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:07:06,997 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:07:06,997 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:07:06,998 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:06,999 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:06,999 INFO L791 eck$LassoCheckResult]: Stem: 140#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 141#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 143#L29 assume !(main_~x~0 > 46); 131#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 133#fibonacciENTRY ~n := #in~n; 134#L17 assume !(~n < 1); 139#L19 assume !(1 == ~n); 129#L22 call #t~ret7 := fibonacci(~n - 1);< 135#fibonacciENTRY ~n := #in~n; 136#L17 assume ~n < 1;#res := 0; 137#fibonacciFINAL assume true; 142#fibonacciEXIT >#34#return; 128#L22-1 [2021-10-28 23:07:06,999 INFO L793 eck$LassoCheckResult]: Loop: 128#L22-1 call #t~ret8 := fibonacci(~n - 2);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume !(~n < 1); 147#L19 assume !(1 == ~n); 130#L22 call #t~ret7 := fibonacci(~n - 1);< 132#fibonacciENTRY ~n := #in~n; 148#L17 assume ~n < 1;#res := 0; 145#fibonacciFINAL assume true; 146#fibonacciEXIT >#34#return; 128#L22-1 [2021-10-28 23:07:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:07,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1923124650, now seen corresponding path program 1 times [2021-10-28 23:07:07,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:07,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784841832] [2021-10-28 23:07:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:07,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 23:07:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:07:07,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:07,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784841832] [2021-10-28 23:07:07,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784841832] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:07:07,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:07:07,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:07:07,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706834991] [2021-10-28 23:07:07,090 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:07:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash 481649848, now seen corresponding path program 1 times [2021-10-28 23:07:07,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:07,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037131983] [2021-10-28 23:07:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:07,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-28 23:07:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:07:07,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:07,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037131983] [2021-10-28 23:07:07,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037131983] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:07:07,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:07:07,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:07:07,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586782202] [2021-10-28 23:07:07,134 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:07:07,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:07:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:07:07,138 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:07:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:07,202 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-10-28 23:07:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:07:07,233 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 33 transitions. [2021-10-28 23:07:07,235 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:07:07,237 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 25 states and 31 transitions. [2021-10-28 23:07:07,237 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-28 23:07:07,237 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-28 23:07:07,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 31 transitions. [2021-10-28 23:07:07,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:07:07,238 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-10-28 23:07:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 31 transitions. [2021-10-28 23:07:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-28 23:07:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-28 23:07:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-10-28 23:07:07,242 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-10-28 23:07:07,242 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-10-28 23:07:07,242 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 23:07:07,242 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 31 transitions. [2021-10-28 23:07:07,243 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:07:07,243 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:07:07,243 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:07:07,244 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:07,245 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 23:07:07,245 INFO L791 eck$LassoCheckResult]: Stem: 215#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 216#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 219#L29 assume !(main_~x~0 > 46); 204#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 221#fibonacciENTRY ~n := #in~n; 210#L17 assume !(~n < 1); 214#L19 assume !(1 == ~n); 205#L22 call #t~ret7 := fibonacci(~n - 1);< 209#fibonacciENTRY ~n := #in~n; 211#L17 assume !(~n < 1); 227#L19 assume 1 == ~n;#res := 1; 226#fibonacciFINAL assume true; 225#fibonacciEXIT >#34#return; 203#L22-1 [2021-10-28 23:07:07,245 INFO L793 eck$LassoCheckResult]: Loop: 203#L22-1 call #t~ret8 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret7 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume !(1 == ~n); 206#L22 call #t~ret7 := fibonacci(~n - 1);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume !(~n < 1); 213#L19 assume 1 == ~n;#res := 1; 222#fibonacciFINAL assume true; 223#fibonacciEXIT >#34#return; 203#L22-1 call #t~ret8 := fibonacci(~n - 2);< 207#fibonacciENTRY ~n := #in~n; 208#L17 assume ~n < 1;#res := 0; 212#fibonacciFINAL assume true; 217#fibonacciEXIT >#36#return; 218#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 220#fibonacciFINAL assume true; 224#fibonacciEXIT >#34#return; 203#L22-1 [2021-10-28 23:07:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash -512653656, now seen corresponding path program 1 times [2021-10-28 23:07:07,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:07,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948353080] [2021-10-28 23:07:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:07,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:07,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:07,280 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:07:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:07,296 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:07:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 1 times [2021-10-28 23:07:07,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:07,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440625598] [2021-10-28 23:07:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:07,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:07,306 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:07:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:07,317 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:07:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash 911295463, now seen corresponding path program 1 times [2021-10-28 23:07:07,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:07,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582159523] [2021-10-28 23:07:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:07,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 23:07:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-10-28 23:07:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 23:07:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:07:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 23:07:07,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:07,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582159523] [2021-10-28 23:07:07,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582159523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:07,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404127609] [2021-10-28 23:07:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:07,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:07,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:07,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:07,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:07:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:07:07,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-28 23:07:07,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404127609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:07,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:07,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 23:07:07,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441280047] [2021-10-28 23:07:08,078 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:08,078 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:08,079 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:08,079 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:08,079 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:07:08,079 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:08,079 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:08,079 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:08,079 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration3_Loop [2021-10-28 23:07:08,080 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:08,080 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:08,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:08,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:08,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:08,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:08,182 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:08,182 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:07:08,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:08,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:08,183 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:08,188 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:08,188 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:08,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 23:07:08,220 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:08,220 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:08,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:08,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:08,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:08,251 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:08,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 23:07:08,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:08,253 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:08,273 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:08,273 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:08,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:08,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:08,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:08,328 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:08,349 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:08,349 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:08,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 23:07:08,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:08,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:08,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:08,406 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:08,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 23:07:08,415 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:07:08,416 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:09,260 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:07:09,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:09,263 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:09,264 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:09,264 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:09,264 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:09,264 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:07:09,264 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:09,264 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:09,264 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:09,264 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration3_Loop [2021-10-28 23:07:09,264 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:09,264 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:09,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:09,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:09,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:09,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:09,363 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:09,363 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:07:09,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:09,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:09,364 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:09,404 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:09,414 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:09,414 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:09,414 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:09,414 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:09,414 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:09,415 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:09,415 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:09,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-28 23:07:09,424 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:09,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2021-10-28 23:07:09,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:09,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:09,460 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:09,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-28 23:07:09,463 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:09,470 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:09,470 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:09,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:09,471 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:09,471 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:09,471 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:09,471 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:09,495 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:09,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:09,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:09,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:09,525 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:09,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-28 23:07:09,532 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:09,539 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:09,540 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:09,540 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:09,540 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:09,540 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:09,541 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:09,541 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:09,551 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:09,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:09,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:09,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:09,581 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:09,586 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:09,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-28 23:07:09,594 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:09,594 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:09,594 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:09,594 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:09,594 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:09,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:09,596 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:09,627 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:07:09,640 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:07:09,640 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:07:09,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:09,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:09,662 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:09,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-28 23:07:09,675 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:07:09,676 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:07:09,676 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:07:09,676 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-28 23:07:09,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:09,707 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:07:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:09,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:07:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:09,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:07:09,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:10,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:07:10,187 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-28 23:07:10,188 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8 Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:07:10,463 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 31 transitions. cyclomatic complexity: 8. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Result 160 states and 216 transitions. Complement of second has 48 states. [2021-10-28 23:07:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 23:07:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 42 transitions. [2021-10-28 23:07:10,465 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 22 letters. [2021-10-28 23:07:10,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:10,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 35 letters. Loop has 22 letters. [2021-10-28 23:07:10,468 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:10,468 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 42 transitions. Stem has 13 letters. Loop has 44 letters. [2021-10-28 23:07:10,469 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:10,470 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 160 states and 216 transitions. [2021-10-28 23:07:10,477 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2021-10-28 23:07:10,484 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 160 states to 129 states and 181 transitions. [2021-10-28 23:07:10,486 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 75 [2021-10-28 23:07:10,489 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 80 [2021-10-28 23:07:10,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 129 states and 181 transitions. [2021-10-28 23:07:10,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:07:10,489 INFO L681 BuchiCegarLoop]: Abstraction has 129 states and 181 transitions. [2021-10-28 23:07:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states and 181 transitions. [2021-10-28 23:07:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2021-10-28 23:07:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 25 states have call successors, (26), 13 states have call predecessors, (26), 15 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2021-10-28 23:07:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 141 transitions. [2021-10-28 23:07:10,523 INFO L704 BuchiCegarLoop]: Abstraction has 107 states and 141 transitions. [2021-10-28 23:07:10,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:10,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:07:10,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:07:10,524 INFO L87 Difference]: Start difference. First operand 107 states and 141 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 23:07:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:10,598 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-10-28 23:07:10,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:07:10,599 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 58 transitions. [2021-10-28 23:07:10,605 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:07:10,611 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 42 states and 54 transitions. [2021-10-28 23:07:10,611 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2021-10-28 23:07:10,611 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 35 [2021-10-28 23:07:10,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 54 transitions. [2021-10-28 23:07:10,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:07:10,613 INFO L681 BuchiCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-10-28 23:07:10,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 54 transitions. [2021-10-28 23:07:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-10-28 23:07:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-28 23:07:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2021-10-28 23:07:10,626 INFO L704 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-10-28 23:07:10,626 INFO L587 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2021-10-28 23:07:10,626 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 23:07:10,626 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 39 states and 48 transitions. [2021-10-28 23:07:10,628 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 23:07:10,630 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:07:10,630 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:07:10,632 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:07:10,633 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 23:07:10,634 INFO L791 eck$LassoCheckResult]: Stem: 888#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 889#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 892#L29 assume !(main_~x~0 > 46); 878#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 880#fibonacciENTRY ~n := #in~n; 881#L17 assume !(~n < 1); 887#L19 assume !(1 == ~n); 877#L22 call #t~ret7 := fibonacci(~n - 1);< 879#fibonacciENTRY ~n := #in~n; 883#L17 assume !(~n < 1); 910#L19 assume !(1 == ~n); 882#L22 call #t~ret7 := fibonacci(~n - 1);< 879#fibonacciENTRY ~n := #in~n; 884#L17 assume !(~n < 1); 894#L19 assume 1 == ~n;#res := 1; 895#fibonacciFINAL assume true; 909#fibonacciEXIT >#34#return; 904#L22-1 call #t~ret8 := fibonacci(~n - 2);< 905#fibonacciENTRY ~n := #in~n; 908#L17 assume ~n < 1;#res := 0; 906#fibonacciFINAL assume true; 903#fibonacciEXIT >#36#return; 902#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 901#fibonacciFINAL assume true; 900#fibonacciEXIT >#34#return; 874#L22-1 [2021-10-28 23:07:10,634 INFO L793 eck$LassoCheckResult]: Loop: 874#L22-1 call #t~ret8 := fibonacci(~n - 2);< 876#fibonacciENTRY ~n := #in~n; 899#L17 assume !(~n < 1); 897#L19 assume !(1 == ~n); 873#L22 call #t~ret7 := fibonacci(~n - 1);< 876#fibonacciENTRY ~n := #in~n; 899#L17 assume !(~n < 1); 897#L19 assume !(1 == ~n); 873#L22 call #t~ret7 := fibonacci(~n - 1);< 876#fibonacciENTRY ~n := #in~n; 899#L17 assume !(~n < 1); 897#L19 assume 1 == ~n;#res := 1; 898#fibonacciFINAL assume true; 907#fibonacciEXIT >#34#return; 872#L22-1 call #t~ret8 := fibonacci(~n - 2);< 875#fibonacciENTRY ~n := #in~n; 885#L17 assume ~n < 1;#res := 0; 886#fibonacciFINAL assume true; 890#fibonacciEXIT >#36#return; 891#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 893#fibonacciFINAL assume true; 896#fibonacciEXIT >#34#return; 874#L22-1 [2021-10-28 23:07:10,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:10,634 INFO L85 PathProgramCache]: Analyzing trace with hash 506180814, now seen corresponding path program 2 times [2021-10-28 23:07:10,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:10,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837452617] [2021-10-28 23:07:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:10,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:10,665 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:07:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:10,685 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:07:10,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:10,691 INFO L85 PathProgramCache]: Analyzing trace with hash 319636608, now seen corresponding path program 2 times [2021-10-28 23:07:10,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:10,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909847834] [2021-10-28 23:07:10,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:10,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:10,709 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:07:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:10,721 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:07:10,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1200508531, now seen corresponding path program 3 times [2021-10-28 23:07:10,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:10,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341566505] [2021-10-28 23:07:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:10,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:10,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 23:07:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:10,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 23:07:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:10,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:07:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:10,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 23:07:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:10,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 23:07:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:10,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:07:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 16 proven. 46 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 23:07:10,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:10,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341566505] [2021-10-28 23:07:10,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341566505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:10,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054248860] [2021-10-28 23:07:10,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:07:10,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:10,908 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:10,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 23:07:11,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-28 23:07:11,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:11,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:07:11,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 47 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-28 23:07:11,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054248860] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:11,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:11,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-10-28 23:07:11,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766742642] [2021-10-28 23:07:11,428 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:11,429 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:11,429 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:11,429 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:11,429 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:07:11,429 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:11,429 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:11,429 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:11,429 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration4_Loop [2021-10-28 23:07:11,429 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:11,430 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:11,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:11,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:11,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:11,442 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:11,477 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:11,477 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:07:11,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:11,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:11,483 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:11,485 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:11,486 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:11,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-28 23:07:11,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:11,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:11,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:11,542 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:11,548 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:07:11,548 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:11,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-28 23:07:12,340 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:07:12,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:12,343 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:12,343 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:12,343 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:12,343 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:12,343 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:07:12,343 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:12,343 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:12,344 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:12,344 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration4_Loop [2021-10-28 23:07:12,344 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:12,344 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:12,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:12,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:12,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:12,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:12,409 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:12,410 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:07:12,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:12,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:12,411 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:12,413 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:12,422 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:12,422 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:12,422 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:12,422 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:12,422 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:12,424 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:12,424 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:12,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-28 23:07:12,443 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:07:12,446 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 23:07:12,447 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 23:07:12,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:12,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:12,449 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:12,453 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:07:12,454 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:07:12,454 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:07:12,454 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-28 23:07:12,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-28 23:07:12,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:12,495 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:07:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:12,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:07:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:12,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:07:12,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:07:13,131 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-28 23:07:13,131 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:07:13,224 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2021-10-28 23:07:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:07:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2021-10-28 23:07:13,225 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2021-10-28 23:07:13,226 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:13,226 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:07:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:07:13,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:13,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:07:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:07:13,822 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-28 23:07:13,822 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:07:13,915 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 46 states and 55 transitions. Complement of second has 11 states. [2021-10-28 23:07:13,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:13,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:07:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 18 transitions. [2021-10-28 23:07:13,918 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 18 transitions. Stem has 25 letters. Loop has 22 letters. [2021-10-28 23:07:13,918 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:13,918 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:07:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:13,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:07:13,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:14,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:07:14,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:14,479 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:07:14,479 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2021-10-28 23:07:14,480 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11 Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:07:14,751 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 39 states and 48 transitions. cyclomatic complexity: 11. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 345 states and 444 transitions. Complement of second has 125 states. [2021-10-28 23:07:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 23:07:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 47 transitions. [2021-10-28 23:07:14,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 22 letters. [2021-10-28 23:07:14,754 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:14,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 47 letters. Loop has 22 letters. [2021-10-28 23:07:14,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:14,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 47 transitions. Stem has 25 letters. Loop has 44 letters. [2021-10-28 23:07:14,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:14,760 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 444 transitions. [2021-10-28 23:07:14,768 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 23:07:14,774 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 220 states and 297 transitions. [2021-10-28 23:07:14,774 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2021-10-28 23:07:14,775 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 116 [2021-10-28 23:07:14,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 220 states and 297 transitions. [2021-10-28 23:07:14,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:07:14,776 INFO L681 BuchiCegarLoop]: Abstraction has 220 states and 297 transitions. [2021-10-28 23:07:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states and 297 transitions. [2021-10-28 23:07:14,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 172. [2021-10-28 23:07:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 112 states have internal predecessors, (122), 38 states have call successors, (42), 23 states have call predecessors, (42), 27 states have return successors, (59), 36 states have call predecessors, (59), 36 states have call successors, (59) [2021-10-28 23:07:14,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 223 transitions. [2021-10-28 23:07:14,794 INFO L704 BuchiCegarLoop]: Abstraction has 172 states and 223 transitions. [2021-10-28 23:07:14,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:14,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:07:14,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:07:14,796 INFO L87 Difference]: Start difference. First operand 172 states and 223 transitions. Second operand has 14 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 12 states have internal predecessors, (35), 9 states have call successors, (12), 2 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2021-10-28 23:07:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:14,980 INFO L93 Difference]: Finished difference Result 273 states and 374 transitions. [2021-10-28 23:07:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:07:14,980 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 273 states and 374 transitions. [2021-10-28 23:07:14,985 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 23:07:14,992 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 273 states to 272 states and 372 transitions. [2021-10-28 23:07:14,992 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 143 [2021-10-28 23:07:14,993 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 153 [2021-10-28 23:07:14,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 272 states and 372 transitions. [2021-10-28 23:07:14,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:07:14,994 INFO L681 BuchiCegarLoop]: Abstraction has 272 states and 372 transitions. [2021-10-28 23:07:14,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states and 372 transitions. [2021-10-28 23:07:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 218. [2021-10-28 23:07:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 140 states have internal predecessors, (151), 47 states have call successors, (55), 28 states have call predecessors, (55), 36 states have return successors, (92), 49 states have call predecessors, (92), 45 states have call successors, (92) [2021-10-28 23:07:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 298 transitions. [2021-10-28 23:07:15,020 INFO L704 BuchiCegarLoop]: Abstraction has 218 states and 298 transitions. [2021-10-28 23:07:15,020 INFO L587 BuchiCegarLoop]: Abstraction has 218 states and 298 transitions. [2021-10-28 23:07:15,020 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 23:07:15,020 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 218 states and 298 transitions. [2021-10-28 23:07:15,022 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 23:07:15,022 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:07:15,022 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:07:15,024 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:07:15,024 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 23:07:15,024 INFO L791 eck$LassoCheckResult]: Stem: 2661#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2662#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 2667#L29 assume !(main_~x~0 > 46); 2668#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 2672#fibonacciENTRY ~n := #in~n; 2707#L17 assume !(~n < 1); 2705#L19 assume !(1 == ~n); 2698#L22 call #t~ret7 := fibonacci(~n - 1);< 2700#fibonacciENTRY ~n := #in~n; 2706#L17 assume !(~n < 1); 2704#L19 assume !(1 == ~n); 2697#L22 call #t~ret7 := fibonacci(~n - 1);< 2700#fibonacciENTRY ~n := #in~n; 2706#L17 assume !(~n < 1); 2704#L19 assume !(1 == ~n); 2697#L22 call #t~ret7 := fibonacci(~n - 1);< 2700#fibonacciENTRY ~n := #in~n; 2706#L17 assume !(~n < 1); 2704#L19 assume !(1 == ~n); 2697#L22 call #t~ret7 := fibonacci(~n - 1);< 2700#fibonacciENTRY ~n := #in~n; 2708#L17 assume !(~n < 1); 2737#L19 assume 1 == ~n;#res := 1; 2736#fibonacciFINAL assume true; 2734#fibonacciEXIT >#34#return; 2730#L22-1 call #t~ret8 := fibonacci(~n - 2);< 2732#fibonacciENTRY ~n := #in~n; 2743#L17 assume ~n < 1;#res := 0; 2741#fibonacciFINAL assume true; 2729#fibonacciEXIT >#36#return; 2728#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2727#fibonacciFINAL assume true; 2717#fibonacciEXIT >#34#return; 2712#L22-1 call #t~ret8 := fibonacci(~n - 2);< 2716#fibonacciENTRY ~n := #in~n; 2722#L17 assume !(~n < 1); 2720#L19 assume 1 == ~n;#res := 1; 2718#fibonacciFINAL assume true; 2711#fibonacciEXIT >#36#return; 2699#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2702#fibonacciFINAL assume true; 2696#fibonacciEXIT >#34#return; 2656#L22-1 call #t~ret8 := fibonacci(~n - 2);< 2691#fibonacciENTRY ~n := #in~n; 2689#L17 assume !(~n < 1); 2690#L19 assume !(1 == ~n); 2655#L22 call #t~ret7 := fibonacci(~n - 1);< 2658#fibonacciENTRY ~n := #in~n; 2826#L17 assume !(~n < 1); 2827#L19 assume !(1 == ~n); 2804#L22 call #t~ret7 := fibonacci(~n - 1);< 2806#fibonacciENTRY [2021-10-28 23:07:15,024 INFO L793 eck$LassoCheckResult]: Loop: 2806#fibonacciENTRY ~n := #in~n; 2818#L17 assume !(~n < 1); 2816#L19 assume !(1 == ~n); 2805#L22 call #t~ret7 := fibonacci(~n - 1);< 2806#fibonacciENTRY [2021-10-28 23:07:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:15,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2139327112, now seen corresponding path program 4 times [2021-10-28 23:07:15,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:15,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662325108] [2021-10-28 23:07:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:15,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:15,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 23:07:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:15,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 23:07:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:15,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 23:07:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:15,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:07:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:15,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-28 23:07:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 23:07:15,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:15,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662325108] [2021-10-28 23:07:15,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662325108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:15,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761326242] [2021-10-28 23:07:15,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:07:15,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:15,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:15,214 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:15,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 23:07:15,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:07:15,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:15,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:07:15,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 23:07:15,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761326242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:15,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:15,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-10-28 23:07:15,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985804604] [2021-10-28 23:07:15,622 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:07:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash 927646, now seen corresponding path program 2 times [2021-10-28 23:07:15,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:15,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005495329] [2021-10-28 23:07:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:15,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:15,628 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:07:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:15,631 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:07:15,666 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:15,666 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:15,666 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:15,666 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:15,666 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:07:15,666 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:15,666 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:15,666 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:15,667 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration5_Loop [2021-10-28 23:07:15,667 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:15,667 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:15,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:15,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:15,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:15,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:15,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:15,703 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:15,703 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:07:15,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:15,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:15,708 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:15,712 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:15,712 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:15,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-28 23:07:15,731 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:15,732 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:15,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-10-28 23:07:15,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:15,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:15,759 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:15,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-28 23:07:15,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:15,760 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:15,768 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:15,768 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=0} Honda state: {fibonacci_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:15,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:15,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:15,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:15,792 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:15,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-28 23:07:15,794 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:15,794 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:15,802 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:15,802 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:15,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:15,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:15,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:15,825 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:15,827 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:15,827 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:15,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-28 23:07:15,835 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:15,835 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret8=0} Honda state: {fibonacci_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:15,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2021-10-28 23:07:15,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:15,855 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:15,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-28 23:07:15,856 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:15,856 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:15,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:15,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:15,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:15,921 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:15,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-28 23:07:15,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:07:15,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:15,994 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:07:15,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-10-28 23:07:15,996 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:15,996 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:15,996 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:15,996 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:15,996 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:07:15,997 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:15,997 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:15,997 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:15,997 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration5_Loop [2021-10-28 23:07:15,997 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:15,997 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:15,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:15,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:16,001 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:16,003 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:16,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:16,069 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:16,069 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:07:16,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:16,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:16,075 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:16,083 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:16,093 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:16,093 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:16,093 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:16,094 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:16,094 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:16,094 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:16,094 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:16,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-28 23:07:16,111 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:16,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:16,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:16,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:16,149 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:16,156 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:16,165 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:16,165 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:16,165 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:16,166 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:16,166 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:16,166 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:16,167 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:16,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-28 23:07:16,183 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:16,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:16,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:16,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:16,221 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:16,225 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:16,234 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:16,234 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:16,234 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:16,234 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:16,234 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:16,235 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:16,235 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:16,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-28 23:07:16,251 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:16,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2021-10-28 23:07:16,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:16,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:16,285 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:16,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-28 23:07:16,287 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:16,294 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:16,294 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:16,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:16,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:16,294 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:16,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:16,295 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:16,301 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:16,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2021-10-28 23:07:16,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:16,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:16,322 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:16,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-28 23:07:16,327 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:16,334 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:16,335 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:16,335 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:16,335 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:16,335 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:16,336 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:16,336 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:16,337 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:07:16,340 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:07:16,340 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:07:16,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:16,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:16,341 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:16,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-28 23:07:16,343 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:07:16,343 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:07:16,343 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:07:16,343 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-10-28 23:07:16,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:16,367 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:07:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:16,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:07:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:07:17,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:07:17,203 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-28 23:07:17,204 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:17,272 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 240 states and 323 transitions. Complement of second has 13 states. [2021-10-28 23:07:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2021-10-28 23:07:17,273 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 51 letters. Loop has 4 letters. [2021-10-28 23:07:17,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:17,274 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:07:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:17,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:07:17,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:17,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:17,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:07:17,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:07:18,023 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-28 23:07:18,023 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:18,084 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 240 states and 323 transitions. Complement of second has 13 states. [2021-10-28 23:07:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2021-10-28 23:07:18,085 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 51 letters. Loop has 4 letters. [2021-10-28 23:07:18,086 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:18,086 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:07:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:18,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:07:18,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:07:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:07:18,780 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-10-28 23:07:18,780 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84 Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:18,863 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 218 states and 298 transitions. cyclomatic complexity: 84. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 291 states and 376 transitions. Complement of second has 14 states. [2021-10-28 23:07:18,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2021-10-28 23:07:18,865 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 51 letters. Loop has 4 letters. [2021-10-28 23:07:18,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:18,869 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 55 letters. Loop has 4 letters. [2021-10-28 23:07:18,871 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:18,871 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 51 letters. Loop has 8 letters. [2021-10-28 23:07:18,872 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:18,872 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 291 states and 376 transitions. [2021-10-28 23:07:18,877 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 23:07:18,884 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 291 states to 236 states and 319 transitions. [2021-10-28 23:07:18,884 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 108 [2021-10-28 23:07:18,886 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 111 [2021-10-28 23:07:18,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 236 states and 319 transitions. [2021-10-28 23:07:18,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:07:18,886 INFO L681 BuchiCegarLoop]: Abstraction has 236 states and 319 transitions. [2021-10-28 23:07:18,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states and 319 transitions. [2021-10-28 23:07:18,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2021-10-28 23:07:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 146 states have (on average 1.1095890410958904) internal successors, (162), 151 states have internal predecessors, (162), 48 states have call successors, (56), 29 states have call predecessors, (56), 36 states have return successors, (94), 49 states have call predecessors, (94), 46 states have call successors, (94) [2021-10-28 23:07:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 312 transitions. [2021-10-28 23:07:18,907 INFO L704 BuchiCegarLoop]: Abstraction has 230 states and 312 transitions. [2021-10-28 23:07:18,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:07:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:07:18,908 INFO L87 Difference]: Start difference. First operand 230 states and 312 transitions. Second operand has 13 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-10-28 23:07:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:19,069 INFO L93 Difference]: Finished difference Result 415 states and 605 transitions. [2021-10-28 23:07:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:07:19,070 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 415 states and 605 transitions. [2021-10-28 23:07:19,078 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 23:07:19,088 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 415 states to 402 states and 587 transitions. [2021-10-28 23:07:19,088 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 214 [2021-10-28 23:07:19,089 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 224 [2021-10-28 23:07:19,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 402 states and 587 transitions. [2021-10-28 23:07:19,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:07:19,090 INFO L681 BuchiCegarLoop]: Abstraction has 402 states and 587 transitions. [2021-10-28 23:07:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states and 587 transitions. [2021-10-28 23:07:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2021-10-28 23:07:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 182 states have (on average 1.120879120879121) internal successors, (204), 185 states have internal predecessors, (204), 64 states have call successors, (76), 37 states have call predecessors, (76), 46 states have return successors, (146), 69 states have call predecessors, (146), 62 states have call successors, (146) [2021-10-28 23:07:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 426 transitions. [2021-10-28 23:07:19,120 INFO L704 BuchiCegarLoop]: Abstraction has 292 states and 426 transitions. [2021-10-28 23:07:19,120 INFO L587 BuchiCegarLoop]: Abstraction has 292 states and 426 transitions. [2021-10-28 23:07:19,120 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 23:07:19,121 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 292 states and 426 transitions. [2021-10-28 23:07:19,124 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 23:07:19,124 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:07:19,124 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:07:19,126 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [14, 12, 9, 9, 8, 5, 5, 4, 4, 3, 2, 1, 1, 1, 1] [2021-10-28 23:07:19,126 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 23:07:19,127 INFO L791 eck$LassoCheckResult]: Stem: 5106#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 5107#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 5114#L29 assume !(main_~x~0 > 46); 5115#L32 call main_#t~ret10 := fibonacci(main_~x~0);< 5120#fibonacciENTRY ~n := #in~n; 5149#L17 assume !(~n < 1); 5148#L19 assume !(1 == ~n); 5140#L22 call #t~ret7 := fibonacci(~n - 1);< 5147#fibonacciENTRY ~n := #in~n; 5292#L17 assume !(~n < 1); 5291#L19 assume !(1 == ~n); 5141#L22 call #t~ret7 := fibonacci(~n - 1);< 5143#fibonacciENTRY ~n := #in~n; 5286#L17 assume !(~n < 1); 5150#L19 assume !(1 == ~n); 5139#L22 call #t~ret7 := fibonacci(~n - 1);< 5143#fibonacciENTRY ~n := #in~n; 5286#L17 assume !(~n < 1); 5150#L19 assume !(1 == ~n); 5139#L22 call #t~ret7 := fibonacci(~n - 1);< 5143#fibonacciENTRY ~n := #in~n; 5286#L17 assume !(~n < 1); 5150#L19 assume !(1 == ~n); 5139#L22 call #t~ret7 := fibonacci(~n - 1);< 5143#fibonacciENTRY ~n := #in~n; 5288#L17 assume !(~n < 1); 5305#L19 assume 1 == ~n;#res := 1; 5304#fibonacciFINAL assume true; 5301#fibonacciEXIT >#34#return; 5297#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5298#fibonacciENTRY ~n := #in~n; 5303#L17 assume ~n < 1;#res := 0; 5300#fibonacciFINAL assume true; 5296#fibonacciEXIT >#36#return; 5294#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5293#fibonacciFINAL assume true; 5290#fibonacciEXIT >#34#return; 5186#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5188#fibonacciENTRY ~n := #in~n; 5228#L17 assume !(~n < 1); 5192#L19 assume 1 == ~n;#res := 1; 5190#fibonacciFINAL assume true; 5185#fibonacciEXIT >#36#return; 5173#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5171#fibonacciFINAL assume true; 5166#fibonacciEXIT >#34#return; 5164#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5168#fibonacciENTRY ~n := #in~n; 5196#L17 assume !(~n < 1); 5193#L19 assume !(1 == ~n); 5194#L22 call #t~ret7 := fibonacci(~n - 1);< 5212#fibonacciENTRY ~n := #in~n; 5287#L17 assume !(~n < 1); 5214#L19 assume 1 == ~n;#res := 1; 5213#fibonacciFINAL assume true; 5210#fibonacciEXIT >#34#return; 5177#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5182#fibonacciENTRY ~n := #in~n; 5209#L17 assume ~n < 1;#res := 0; 5208#fibonacciFINAL assume true; 5174#fibonacciEXIT >#36#return; 5180#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5169#fibonacciFINAL assume true; 5163#fibonacciEXIT >#36#return; 5142#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 5145#fibonacciFINAL assume true; 5138#fibonacciEXIT >#34#return; 5129#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5134#fibonacciENTRY ~n := #in~n; 5128#L17 assume !(~n < 1); 5131#L19 assume !(1 == ~n); 5105#L22 call #t~ret7 := fibonacci(~n - 1);< 5308#fibonacciENTRY ~n := #in~n; 5329#L17 assume !(~n < 1); 5365#L19 assume !(1 == ~n); 5095#L22 call #t~ret7 := fibonacci(~n - 1);< 5093#fibonacciENTRY ~n := #in~n; 5097#L17 assume !(~n < 1); 5339#L19 assume !(1 == ~n); 5094#L22 [2021-10-28 23:07:19,127 INFO L793 eck$LassoCheckResult]: Loop: 5094#L22 call #t~ret7 := fibonacci(~n - 1);< 5093#fibonacciENTRY ~n := #in~n; 5097#L17 assume !(~n < 1); 5339#L19 assume !(1 == ~n); 5094#L22 [2021-10-28 23:07:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash -970341416, now seen corresponding path program 5 times [2021-10-28 23:07:19,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:19,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25622469] [2021-10-28 23:07:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:19,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:19,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-28 23:07:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 23:07:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 23:07:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 23:07:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:07:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-28 23:07:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-28 23:07:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 23:07:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 23:07:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 125 proven. 115 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-10-28 23:07:19,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:07:19,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25622469] [2021-10-28 23:07:19,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25622469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:19,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082427602] [2021-10-28 23:07:19,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:07:19,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:07:19,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:19,383 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:07:19,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-28 23:07:19,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-10-28 23:07:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:07:19,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:07:19,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 129 proven. 109 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 23:07:20,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082427602] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:07:20,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:07:20,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2021-10-28 23:07:20,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324706428] [2021-10-28 23:07:20,057 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:07:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1906756, now seen corresponding path program 3 times [2021-10-28 23:07:20,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:07:20,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65359661] [2021-10-28 23:07:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:07:20,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:07:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:20,065 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:07:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:07:20,068 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:07:20,121 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:20,121 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:20,121 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:20,121 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:20,122 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:07:20,122 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:20,122 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:20,122 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:20,122 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration6_Loop [2021-10-28 23:07:20,122 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:20,122 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:20,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:20,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:20,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:20,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:20,181 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:20,181 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:07:20,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:20,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:20,183 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:20,191 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:20,191 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:20,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-28 23:07:20,215 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:07:20,215 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:07:20,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:20,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:20,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:20,253 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:20,255 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:07:20,255 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:20,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-28 23:07:20,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:20,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:20,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:20,318 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:20,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:07:20,320 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:07:20,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-28 23:07:26,215 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:07:26,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2021-10-28 23:07:26,223 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:07:26,223 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:07:26,223 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:07:26,223 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:07:26,223 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:07:26,223 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:26,223 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:07:26,224 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:07:26,224 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci03.c_Iteration6_Loop [2021-10-28 23:07:26,224 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:07:26,224 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:07:26,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:26,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:26,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:26,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:07:26,271 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:07:26,271 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:07:26,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:26,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:26,272 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:26,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-28 23:07:26,273 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:26,280 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:26,281 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:26,281 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:26,281 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:26,281 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:26,281 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:26,281 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:26,282 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:26,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Ended with exit code 0 [2021-10-28 23:07:26,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:26,302 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:26,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-28 23:07:26,304 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:26,311 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:26,311 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:26,311 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:26,311 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:26,311 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:26,312 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:26,312 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:26,313 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:26,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:26,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:26,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:26,335 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:26,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-28 23:07:26,336 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:26,343 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:26,343 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:26,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:26,343 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:26,343 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:26,343 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:26,343 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:26,344 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:07:26,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:26,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:26,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:26,364 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:26,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-28 23:07:26,366 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:07:26,373 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:07:26,374 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:07:26,374 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:07:26,374 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:07:26,374 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:07:26,375 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:07:26,375 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:07:26,377 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:07:26,379 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:07:26,379 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:07:26,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:07:26,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:07:26,387 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:07:26,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-10-28 23:07:26,389 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:07:26,389 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:07:26,389 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:07:26,389 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-28 23:07:26,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:26,408 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:07:26,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:26,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:07:26,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:27,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:27,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:07:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:07:27,547 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-28 23:07:27,547 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:27,598 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 301 states and 436 transitions. Complement of second has 18 states. [2021-10-28 23:07:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 14 transitions. [2021-10-28 23:07:27,600 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 14 transitions. Stem has 79 letters. Loop has 4 letters. [2021-10-28 23:07:27,600 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:27,600 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:07:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:07:27,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:07:28,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:07:28,832 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-28 23:07:28,832 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:28,906 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 307 states and 442 transitions. Complement of second has 17 states. [2021-10-28 23:07:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2021-10-28 23:07:28,907 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 79 letters. Loop has 4 letters. [2021-10-28 23:07:28,908 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:28,908 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:07:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:07:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:28,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:07:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:07:29,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:07:29,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:07:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:07:30,011 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-10-28 23:07:30,011 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138 Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:30,080 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 292 states and 426 transitions. cyclomatic complexity: 138. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 354 states and 504 transitions. Complement of second has 27 states. [2021-10-28 23:07:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-28 23:07:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:07:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 23 transitions. [2021-10-28 23:07:30,082 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 23 transitions. Stem has 79 letters. Loop has 4 letters. [2021-10-28 23:07:30,082 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:30,082 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 23 transitions. Stem has 83 letters. Loop has 4 letters. [2021-10-28 23:07:30,083 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:30,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 23 transitions. Stem has 79 letters. Loop has 8 letters. [2021-10-28 23:07:30,084 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:07:30,084 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 354 states and 504 transitions. [2021-10-28 23:07:30,091 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 23:07:30,096 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 354 states to 292 states and 426 transitions. [2021-10-28 23:07:30,097 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 136 [2021-10-28 23:07:30,097 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 149 [2021-10-28 23:07:30,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 292 states and 426 transitions. [2021-10-28 23:07:30,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:07:30,098 INFO L681 BuchiCegarLoop]: Abstraction has 292 states and 426 transitions. [2021-10-28 23:07:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states and 426 transitions. [2021-10-28 23:07:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2021-10-28 23:07:30,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 182 states have (on average 1.120879120879121) internal successors, (204), 185 states have internal predecessors, (204), 64 states have call successors, (76), 37 states have call predecessors, (76), 46 states have return successors, (146), 69 states have call predecessors, (146), 62 states have call successors, (146) [2021-10-28 23:07:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 426 transitions. [2021-10-28 23:07:30,111 INFO L704 BuchiCegarLoop]: Abstraction has 292 states and 426 transitions. [2021-10-28 23:07:30,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:07:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:07:30,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:07:30,112 INFO L87 Difference]: Start difference. First operand 292 states and 426 transitions. Second operand has 17 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 11 states have call successors, (14), 4 states have call predecessors, (14), 6 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2021-10-28 23:07:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:07:30,322 INFO L93 Difference]: Finished difference Result 417 states and 613 transitions. [2021-10-28 23:07:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 23:07:30,323 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 417 states and 613 transitions. [2021-10-28 23:07:30,331 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 23:07:30,331 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 417 states to 0 states and 0 transitions. [2021-10-28 23:07:30,331 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-28 23:07:30,331 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-28 23:07:30,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-28 23:07:30,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:07:30,332 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:07:30,332 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:07:30,332 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 23:07:30,332 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 23:07:30,332 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-28 23:07:30,332 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 23:07:30,333 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-28 23:07:30,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 11:07:30 BoogieIcfgContainer [2021-10-28 23:07:30,338 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 23:07:30,339 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:07:30,339 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:07:30,339 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:07:30,340 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:07:05" (3/4) ... [2021-10-28 23:07:30,342 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 23:07:30,342 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:07:30,344 INFO L168 Benchmark]: Toolchain (without parser) took 26042.56 ms. Allocated memory was 111.1 MB in the beginning and 186.6 MB in the end (delta: 75.5 MB). Free memory was 79.7 MB in the beginning and 74.5 MB in the end (delta: 5.1 MB). Peak memory consumption was 79.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:07:30,344 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 111.1 MB. Free memory was 64.7 MB in the beginning and 64.6 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:07:30,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.90 ms. Allocated memory is still 111.1 MB. Free memory was 79.5 MB in the beginning and 86.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:07:30,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.18 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 85.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:07:30,345 INFO L168 Benchmark]: Boogie Preprocessor took 18.39 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 84.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:07:30,346 INFO L168 Benchmark]: RCFGBuilder took 349.00 ms. Allocated memory is still 111.1 MB. Free memory was 84.1 MB in the beginning and 75.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:07:30,346 INFO L168 Benchmark]: BuchiAutomizer took 25331.69 ms. Allocated memory was 111.1 MB in the beginning and 186.6 MB in the end (delta: 75.5 MB). Free memory was 75.1 MB in the beginning and 74.5 MB in the end (delta: 584.0 kB). Peak memory consumption was 78.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:07:30,346 INFO L168 Benchmark]: Witness Printer took 3.68 ms. Allocated memory is still 186.6 MB. Free memory is still 74.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:07:30,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 111.1 MB. Free memory was 64.7 MB in the beginning and 64.6 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.90 ms. Allocated memory is still 111.1 MB. Free memory was 79.5 MB in the beginning and 86.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.18 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 85.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.39 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 84.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 349.00 ms. Allocated memory is still 111.1 MB. Free memory was 84.1 MB in the beginning and 75.3 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 25331.69 ms. Allocated memory was 111.1 MB in the beginning and 186.6 MB in the end (delta: 75.5 MB). Free memory was 75.1 MB in the beginning and 74.5 MB in the end (delta: 584.0 kB). Peak memory consumption was 78.2 MB. Max. memory is 16.1 GB. * Witness Printer took 3.68 ms. Allocated memory is still 186.6 MB. Free memory is still 74.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 5 modules have a trivial ranking function, the largest among these consists of 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 25.2s and 7 iterations. TraceHistogramMax:14. Analysis of lassos took 14.5s. Construction of modules took 0.7s. Büchi inclusion checks took 9.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 248 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 292 states and ocurred in iteration 5. Nontrivial modules had stage [2, 0, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 16/46 HoareTripleCheckerStatistics: 206 SDtfs, 480 SDslu, 271 SDs, 0 SdLazy, 817 SolverSat, 312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI1 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf94 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp75 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 44ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-28 23:07:30,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:30,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:30,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-28 23:07:30,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:07:31,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2d7751d-e267-4922-be0d-ac9a856c5b9c/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...