./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02.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_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg --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 b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 09:16:23,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:16:23,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:16:23,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:16:23,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:16:23,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:16:23,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:16:23,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:16:23,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:16:23,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:16:23,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:16:23,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:16:23,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:16:23,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:16:23,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:16:23,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:16:23,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:16:23,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:16:23,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:16:23,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:16:23,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:16:23,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:16:23,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:16:23,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:16:23,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:16:23,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:16:23,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:16:23,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:16:23,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:16:23,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:16:23,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:16:23,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:16:23,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:16:23,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:16:23,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:16:23,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:16:23,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:16:23,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:16:23,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:16:23,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:16:23,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:16:23,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-28 09:16:24,006 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:16:24,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:16:24,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:16:24,007 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:16:24,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:16:24,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:16:24,009 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:16:24,010 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 09:16:24,010 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 09:16:24,012 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 09:16:24,012 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 09:16:24,013 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 09:16:24,013 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 09:16:24,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:16:24,014 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:16:24,014 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:16:24,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:16:24,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:16:24,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:16:24,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 09:16:24,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 09:16:24,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 09:16:24,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:16:24,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:16:24,017 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 09:16:24,017 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:16:24,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 09:16:24,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:16:24,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:16:24,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:16:24,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:16:24,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:16:24,019 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 09:16:24,019 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_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 [2021-10-28 09:16:24,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:16:24,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:16:24,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:16:24,286 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:16:24,288 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:16:24,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/recursive/Fibonacci02.c [2021-10-28 09:16:24,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/data/857a4f162/e0df4c594fb54ca0a6f768c96edfd573/FLAGf96d65d6c [2021-10-28 09:16:24,798 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:16:24,799 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/sv-benchmarks/c/recursive/Fibonacci02.c [2021-10-28 09:16:24,805 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/data/857a4f162/e0df4c594fb54ca0a6f768c96edfd573/FLAGf96d65d6c [2021-10-28 09:16:25,200 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/data/857a4f162/e0df4c594fb54ca0a6f768c96edfd573 [2021-10-28 09:16:25,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:16:25,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:16:25,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:16:25,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:16:25,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:16:25,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3451e2f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25, skipping insertion in model container [2021-10-28 09:16:25,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:16:25,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:16:25,407 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_157bfda2-d423-48b8-83d4-0829ca6eb750/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2021-10-28 09:16:25,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:16:25,423 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:16:25,437 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_157bfda2-d423-48b8-83d4-0829ca6eb750/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2021-10-28 09:16:25,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:16:25,451 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:16:25,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25 WrapperNode [2021-10-28 09:16:25,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:16:25,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:16:25,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:16:25,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:16:25,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:16:25,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:16:25,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:16:25,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:16:25,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:16:25,504 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:16:25,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:16:25,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:16:25,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (1/1) ... [2021-10-28 09:16:25,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:25,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:25,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:25,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 09:16:25,607 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-10-28 09:16:25,607 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-10-28 09:16:25,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:16:25,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:16:25,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:16:25,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:16:25,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:16:25,827 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 09:16:25,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:16:25 BoogieIcfgContainer [2021-10-28 09:16:25,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:16:25,830 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 09:16:25,830 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 09:16:25,833 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 09:16:25,834 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:16:25,835 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 09:16:25" (1/3) ... [2021-10-28 09:16:25,836 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3608833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:16:25, skipping insertion in model container [2021-10-28 09:16:25,836 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:16:25,836 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:16:25" (2/3) ... [2021-10-28 09:16:25,837 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3608833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:16:25, skipping insertion in model container [2021-10-28 09:16:25,837 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:16:25,837 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:16:25" (3/3) ... [2021-10-28 09:16:25,839 INFO L389 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2021-10-28 09:16:25,898 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 09:16:25,898 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 09:16:25,898 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 09:16:25,898 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 09:16:25,899 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 09:16:25,899 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 09:16:25,899 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 09:16:25,899 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 09:16:25,914 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 09:16:25,937 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:25,937 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:25,938 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:25,944 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 09:16:25,944 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:16:25,945 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 09:16:25,945 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 09:16:25,948 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:25,949 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:25,949 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:25,949 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 09:16:25,950 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:16:25,956 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); 15#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 11#L29true call main_#t~ret9 := fibonacci(main_~x~0);< 5#fibonacciENTRYtrue [2021-10-28 09:16:25,957 INFO L793 eck$LassoCheckResult]: Loop: 5#fibonacciENTRYtrue ~n := #in~n; 6#L17true assume !(~n < 1); 18#L19true assume !(1 == ~n); 17#L22true call #t~ret7 := fibonacci(~n - 1);< 5#fibonacciENTRYtrue [2021-10-28 09:16:25,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:25,962 INFO L85 PathProgramCache]: Analyzing trace with hash 42781, now seen corresponding path program 1 times [2021-10-28 09:16:25,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:25,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036715273] [2021-10-28 09:16:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:25,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:26,083 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:26,128 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 1 times [2021-10-28 09:16:26,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:26,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347715593] [2021-10-28 09:16:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:26,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:26,141 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:26,147 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:26,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:26,150 INFO L85 PathProgramCache]: Analyzing trace with hash 854450357, now seen corresponding path program 1 times [2021-10-28 09:16:26,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:26,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906217872] [2021-10-28 09:16:26,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:26,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:26,181 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:26,212 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:26,369 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:26,369 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:26,370 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:26,370 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:26,370 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:26,370 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,371 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:26,371 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:26,371 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-10-28 09:16:26,371 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:26,371 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:26,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:26,395 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 09:16:26,400 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 09:16:26,406 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 09:16:26,409 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 09:16:26,516 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:26,517 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:26,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 09:16:26,526 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:26,527 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:26,539 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:26,539 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 09:16:26,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:26,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 09:16:26,562 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:26,562 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:26,576 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:26,577 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 09:16:26,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:26,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 09:16:26,600 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:26,600 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:26,612 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:26,612 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 09:16:26,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:26,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,636 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:26,636 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:26,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 09:16:26,671 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:26,671 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 09:16:26,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:26,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,718 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 09:16:26,721 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:26,721 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:26,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:26,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,776 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,787 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:26,787 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:26,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 09:16:26,870 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:26,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:26,879 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:26,879 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:26,879 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:26,879 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:26,879 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:26,879 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,880 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:26,880 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:26,880 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2021-10-28 09:16:26,880 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:26,880 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:26,881 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 09:16:26,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:26,888 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 09:16:26,892 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:26,896 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 09:16:26,957 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:26,962 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:26,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:26,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:26,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:26,971 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 09:16:26,981 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:26,981 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:26,982 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:26,982 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:26,982 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:26,984 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:26,984 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:26,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 09:16:27,004 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:27,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-10-28 09:16:27,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:27,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:27,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:27,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 09:16:27,029 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 09:16:27,036 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:27,036 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:27,036 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:27,036 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:27,037 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:27,037 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:27,037 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:27,055 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:27,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2021-10-28 09:16:27,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:27,076 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:27,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 09:16:27,077 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 09:16:27,084 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:27,084 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:27,085 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:27,085 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:27,085 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:27,086 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:27,086 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:27,096 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:27,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:27,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:27,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:27,122 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:27,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 09:16:27,126 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 09:16:27,133 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:27,134 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:27,134 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:27,134 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:27,134 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:27,135 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:27,135 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:27,148 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:27,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:27,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:27,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:27,169 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:27,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 09:16:27,173 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 09:16:27,180 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:27,180 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:27,181 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:27,181 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:27,181 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:27,182 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:27,182 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:27,184 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:27,228 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:16:27,228 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:16:27,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:27,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:27,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:27,272 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:27,273 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:27,273 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:27,273 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-10-28 09:16:27,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 09:16:27,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:27,312 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:16:27,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:27,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:27,493 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 09:16:27,513 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 09:16:27,514 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 09:16:27,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:27,693 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 47 states and 59 transitions. Complement of second has 12 states. [2021-10-28 09:16:27,699 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 09:16:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 09:16:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-28 09:16:27,708 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-28 09:16:27,712 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:27,712 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-10-28 09:16:27,712 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:27,712 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-10-28 09:16:27,713 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:27,714 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2021-10-28 09:16:27,726 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:27,734 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 25 states and 34 transitions. [2021-10-28 09:16:27,735 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-28 09:16:27,735 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-10-28 09:16:27,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-10-28 09:16:27,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:27,736 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-28 09:16:27,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-10-28 09:16:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-28 09:16:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 09:16:27,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-10-28 09:16:27,771 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-28 09:16:27,771 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-10-28 09:16:27,771 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 09:16:27,771 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-10-28 09:16:27,772 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:27,772 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:27,772 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:27,773 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:27,773 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:27,774 INFO L791 eck$LassoCheckResult]: Stem: 132#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); 133#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 122#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 131#fibonacciENTRY ~n := #in~n; 128#L17 assume !(~n < 1); 129#L19 assume !(1 == ~n); 121#L22 call #t~ret7 := fibonacci(~n - 1);< 130#fibonacciENTRY ~n := #in~n; 125#L17 assume ~n < 1;#res := 0; 126#fibonacciFINAL assume true; 134#fibonacciEXIT >#29#return; 120#L22-1 [2021-10-28 09:16:27,774 INFO L793 eck$LassoCheckResult]: Loop: 120#L22-1 call #t~ret8 := fibonacci(~n - 2);< 124#fibonacciENTRY ~n := #in~n; 139#L17 assume !(~n < 1); 138#L19 assume !(1 == ~n); 123#L22 call #t~ret7 := fibonacci(~n - 1);< 124#fibonacciENTRY ~n := #in~n; 139#L17 assume ~n < 1;#res := 0; 136#fibonacciFINAL assume true; 137#fibonacciEXIT >#29#return; 120#L22-1 [2021-10-28 09:16:27,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:27,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1391758089, now seen corresponding path program 1 times [2021-10-28 09:16:27,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:27,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744861132] [2021-10-28 09:16:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:27,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:27,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:16:27,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:27,861 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 09:16:27,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:27,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744861132] [2021-10-28 09:16:27,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744861132] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:27,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:27,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:16:27,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760651676] [2021-10-28 09:16:27,875 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:27,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:27,876 INFO L85 PathProgramCache]: Analyzing trace with hash 924369961, now seen corresponding path program 1 times [2021-10-28 09:16:27,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:27,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697529118] [2021-10-28 09:16:27,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:27,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:27,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-28 09:16:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:27,917 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 09:16:27,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:27,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697529118] [2021-10-28 09:16:27,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697529118] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:16:27,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:16:27,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:16:27,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801522262] [2021-10-28 09:16:27,919 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:16:27,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:27,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:16:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:16:27,923 INFO L87 Difference]: Start difference. First operand 20 states and 26 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 09:16:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:28,006 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-10-28 09:16:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:16:28,007 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-10-28 09:16:28,013 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:28,016 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-10-28 09:16:28,017 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-28 09:16:28,018 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-10-28 09:16:28,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-10-28 09:16:28,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:28,018 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-28 09:16:28,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-10-28 09:16:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 09:16:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 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 09:16:28,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-10-28 09:16:28,027 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-28 09:16:28,027 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-10-28 09:16:28,027 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 09:16:28,027 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-10-28 09:16:28,028 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-10-28 09:16:28,028 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:28,028 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:28,031 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:28,032 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:28,032 INFO L791 eck$LassoCheckResult]: Stem: 204#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); 205#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 194#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 208#fibonacciENTRY ~n := #in~n; 200#L17 assume !(~n < 1); 203#L19 assume !(1 == ~n); 195#L22 call #t~ret7 := fibonacci(~n - 1);< 199#fibonacciENTRY ~n := #in~n; 201#L17 assume !(~n < 1); 202#L19 assume 1 == ~n;#res := 1; 216#fibonacciFINAL assume true; 215#fibonacciEXIT >#29#return; 193#L22-1 [2021-10-28 09:16:28,032 INFO L793 eck$LassoCheckResult]: Loop: 193#L22-1 call #t~ret8 := fibonacci(~n - 2);< 197#fibonacciENTRY ~n := #in~n; 198#L17 assume !(~n < 1); 210#L19 assume !(1 == ~n); 196#L22 call #t~ret7 := fibonacci(~n - 1);< 197#fibonacciENTRY ~n := #in~n; 198#L17 assume !(~n < 1); 210#L19 assume 1 == ~n;#res := 1; 211#fibonacciFINAL assume true; 213#fibonacciEXIT >#29#return; 193#L22-1 [2021-10-28 09:16:28,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash 194852287, now seen corresponding path program 1 times [2021-10-28 09:16:28,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:28,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148753325] [2021-10-28 09:16:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:28,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:28,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 09:16:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:28,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:28,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148753325] [2021-10-28 09:16:28,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148753325] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:28,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9800505] [2021-10-28 09:16:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:28,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:28,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:28,152 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:28,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:16:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:28,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:16:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:28,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9800505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:28,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:28,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 09:16:28,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228721826] [2021-10-28 09:16:28,289 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1409277793, now seen corresponding path program 1 times [2021-10-28 09:16:28,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:28,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014991081] [2021-10-28 09:16:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:28,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:28,296 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:28,302 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:28,439 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:28,440 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:28,440 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:28,440 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:28,440 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:28,440 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:28,440 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:28,440 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:28,440 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-10-28 09:16:28,440 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:28,440 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:28,441 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 09:16:28,448 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 09:16:28,451 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 09:16:28,453 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 09:16:28,508 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:28,508 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:28,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:28,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:28,509 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:28,519 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:28,519 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:28,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 09:16:28,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:28,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:28,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:28,550 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:28,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 09:16:28,551 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:28,551 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:29,044 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:29,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:29,047 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:29,047 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:29,047 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:29,047 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:29,047 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:29,047 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:29,047 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:29,047 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:29,047 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2021-10-28 09:16:29,047 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:29,047 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:29,048 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 09:16:29,060 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 09:16:29,063 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 09:16:29,066 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 09:16:29,111 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:29,111 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:29,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:29,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:29,112 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:29,119 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 09:16:29,128 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:29,128 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:29,128 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:29,128 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:29,128 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:29,130 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:29,130 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:29,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 09:16:29,146 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:29,160 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:16:29,160 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:16:29,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:29,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:29,167 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:29,176 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:29,176 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:29,177 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:29,177 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-28 09:16:29,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 09:16:29,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:29,199 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:29,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:16:29,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:16:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:16:29,595 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-10-28 09:16:29,596 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:16:29,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:29,815 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2021-10-28 09:16:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-10-28 09:16:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:16:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-10-28 09:16:29,817 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-10-28 09:16:29,818 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:29,822 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-10-28 09:16:29,823 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:29,823 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-10-28 09:16:29,826 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:29,827 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-10-28 09:16:29,844 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-28 09:16:29,853 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-10-28 09:16:29,853 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-10-28 09:16:29,853 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-28 09:16:29,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-10-28 09:16:29,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:29,854 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-10-28 09:16:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-10-28 09:16:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-10-28 09:16:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2021-10-28 09:16:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-10-28 09:16:29,875 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-10-28 09:16:29,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:16:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:16:29,876 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:29,967 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-10-28 09:16:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:16:29,967 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-10-28 09:16:29,976 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-28 09:16:29,982 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-10-28 09:16:29,984 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-10-28 09:16:29,985 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-10-28 09:16:29,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-10-28 09:16:29,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:29,986 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-10-28 09:16:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-10-28 09:16:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-10-28 09:16:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2021-10-28 09:16:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-10-28 09:16:30,004 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-28 09:16:30,004 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-10-28 09:16:30,004 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 09:16:30,004 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-10-28 09:16:30,006 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-10-28 09:16:30,006 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:30,006 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:30,008 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:30,008 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-10-28 09:16:30,009 INFO L791 eck$LassoCheckResult]: Stem: 754#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 755#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 735#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 761#fibonacciENTRY ~n := #in~n; 752#L17 assume !(~n < 1); 753#L19 assume !(1 == ~n); 744#L22 call #t~ret7 := fibonacci(~n - 1);< 743#fibonacciENTRY ~n := #in~n; 746#L17 assume !(~n < 1); 796#L19 assume !(1 == ~n); 745#L22 call #t~ret7 := fibonacci(~n - 1);< 743#fibonacciENTRY ~n := #in~n; 746#L17 assume !(~n < 1); 796#L19 assume !(1 == ~n); 745#L22 call #t~ret7 := fibonacci(~n - 1);< 743#fibonacciENTRY ~n := #in~n; 747#L17 assume !(~n < 1); 797#L19 assume 1 == ~n;#res := 1; 795#fibonacciFINAL assume true; 794#fibonacciEXIT >#29#return; 738#L22-1 call #t~ret8 := fibonacci(~n - 2);< 793#fibonacciENTRY ~n := #in~n; 824#L17 assume ~n < 1;#res := 0; 823#fibonacciFINAL assume true; 820#fibonacciEXIT >#31#return; 819#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 817#fibonacciFINAL assume true; 815#fibonacciEXIT >#29#return; 741#L22-1 [2021-10-28 09:16:30,009 INFO L793 eck$LassoCheckResult]: Loop: 741#L22-1 call #t~ret8 := fibonacci(~n - 2);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume !(1 == ~n); 740#L22 call #t~ret7 := fibonacci(~n - 1);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume !(1 == ~n); 740#L22 call #t~ret7 := fibonacci(~n - 1);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume 1 == ~n;#res := 1; 771#fibonacciFINAL assume true; 813#fibonacciEXIT >#29#return; 741#L22-1 call #t~ret8 := fibonacci(~n - 2);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume !(1 == ~n); 740#L22 call #t~ret7 := fibonacci(~n - 1);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume !(~n < 1); 770#L19 assume 1 == ~n;#res := 1; 771#fibonacciFINAL assume true; 813#fibonacciEXIT >#29#return; 741#L22-1 call #t~ret8 := fibonacci(~n - 2);< 736#fibonacciENTRY ~n := #in~n; 742#L17 assume ~n < 1;#res := 0; 798#fibonacciFINAL assume true; 822#fibonacciEXIT >#31#return; 814#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 818#fibonacciFINAL assume true; 816#fibonacciEXIT >#31#return; 814#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 818#fibonacciFINAL assume true; 816#fibonacciEXIT >#29#return; 741#L22-1 [2021-10-28 09:16:30,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash 716279287, now seen corresponding path program 1 times [2021-10-28 09:16:30,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:30,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901095411] [2021-10-28 09:16:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:30,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-10-28 09:16:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:16:30,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:30,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901095411] [2021-10-28 09:16:30,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901095411] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:30,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737894611] [2021-10-28 09:16:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:30,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:30,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:30,139 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:30,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:16:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:16:30,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:16:30,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737894611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:30,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:30,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-10-28 09:16:30,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108532509] [2021-10-28 09:16:30,323 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:30,323 INFO L85 PathProgramCache]: Analyzing trace with hash -202791443, now seen corresponding path program 1 times [2021-10-28 09:16:30,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:30,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603361772] [2021-10-28 09:16:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:30,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-10-28 09:16:30,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:16:30,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:30,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603361772] [2021-10-28 09:16:30,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603361772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:30,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455426560] [2021-10-28 09:16:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:30,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:30,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:30,417 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:30,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:16:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:16:30,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-28 09:16:30,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455426560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:30,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:30,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-28 09:16:30,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515651614] [2021-10-28 09:16:30,592 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:16:30,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 09:16:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:16:30,594 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:16:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:30,780 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2021-10-28 09:16:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:16:30,781 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 158 transitions. [2021-10-28 09:16:30,784 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-28 09:16:30,790 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 156 transitions. [2021-10-28 09:16:30,790 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-28 09:16:30,790 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-28 09:16:30,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 156 transitions. [2021-10-28 09:16:30,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:30,791 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-28 09:16:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 156 transitions. [2021-10-28 09:16:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-28 09:16:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 76 states have internal predecessors, (85), 26 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (44), 24 states have call predecessors, (44), 24 states have call successors, (44) [2021-10-28 09:16:30,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 156 transitions. [2021-10-28 09:16:30,831 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-28 09:16:30,832 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 156 transitions. [2021-10-28 09:16:30,832 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 09:16:30,832 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 156 transitions. [2021-10-28 09:16:30,834 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-10-28 09:16:30,837 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:30,837 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:30,838 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:30,840 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 09:16:30,840 INFO L791 eck$LassoCheckResult]: Stem: 1262#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1263#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 1246#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 1268#fibonacciENTRY ~n := #in~n; 1306#L17 assume !(~n < 1); 1276#L19 assume !(1 == ~n); 1257#L22 call #t~ret7 := fibonacci(~n - 1);< 1256#fibonacciENTRY ~n := #in~n; 1258#L17 assume !(~n < 1); 1261#L19 assume !(1 == ~n); 1270#L22 call #t~ret7 := fibonacci(~n - 1);< 1300#fibonacciENTRY ~n := #in~n; 1304#L17 assume !(~n < 1); 1302#L19 assume !(1 == ~n); 1269#L22 call #t~ret7 := fibonacci(~n - 1);< 1300#fibonacciENTRY ~n := #in~n; 1304#L17 assume !(~n < 1); 1302#L19 assume !(1 == ~n); 1269#L22 call #t~ret7 := fibonacci(~n - 1);< 1300#fibonacciENTRY ~n := #in~n; 1305#L17 assume !(~n < 1); 1303#L19 assume 1 == ~n;#res := 1; 1301#fibonacciFINAL assume true; 1299#fibonacciEXIT >#29#return; 1249#L22-1 call #t~ret8 := fibonacci(~n - 2);< 1297#fibonacciENTRY ~n := #in~n; 1259#L17 assume ~n < 1;#res := 0; 1260#fibonacciFINAL assume true; 1264#fibonacciEXIT >#31#return; 1265#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1271#fibonacciFINAL assume true; 1277#fibonacciEXIT >#29#return; 1309#L22-1 [2021-10-28 09:16:30,840 INFO L793 eck$LassoCheckResult]: Loop: 1309#L22-1 call #t~ret8 := fibonacci(~n - 2);< 1247#fibonacciENTRY ~n := #in~n; 1307#L17 assume !(~n < 1); 1312#L19 assume !(1 == ~n); 1310#L22 call #t~ret7 := fibonacci(~n - 1);< 1247#fibonacciENTRY ~n := #in~n; 1307#L17 assume !(~n < 1); 1312#L19 assume !(1 == ~n); 1310#L22 call #t~ret7 := fibonacci(~n - 1);< 1247#fibonacciENTRY ~n := #in~n; 1307#L17 assume !(~n < 1); 1312#L19 assume 1 == ~n;#res := 1; 1275#fibonacciFINAL assume true; 1347#fibonacciEXIT >#29#return; 1254#L22-1 call #t~ret8 := fibonacci(~n - 2);< 1251#fibonacciENTRY ~n := #in~n; 1255#L17 assume ~n < 1;#res := 0; 1311#fibonacciFINAL assume true; 1346#fibonacciEXIT >#31#return; 1337#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1344#fibonacciFINAL assume true; 1339#fibonacciEXIT >#29#return; 1309#L22-1 [2021-10-28 09:16:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1460678817, now seen corresponding path program 2 times [2021-10-28 09:16:30,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:30,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124260580] [2021-10-28 09:16:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:30,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:30,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 09:16:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:16:31,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:31,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124260580] [2021-10-28 09:16:31,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124260580] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:31,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563971917] [2021-10-28 09:16:31,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:16:31,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:31,052 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:31,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:16:31,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:16:31,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:16:31,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:16:31,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-28 09:16:31,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563971917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:31,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:31,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-10-28 09:16:31,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527533301] [2021-10-28 09:16:31,275 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1166275439, now seen corresponding path program 2 times [2021-10-28 09:16:31,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:31,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185566068] [2021-10-28 09:16:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:31,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:31,285 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:31,299 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:31,593 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:31,593 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:31,593 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:31,593 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:31,593 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:31,593 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:31,593 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:31,593 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:31,593 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-10-28 09:16:31,593 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:31,593 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:31,594 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 09:16:31,597 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 09:16:31,599 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 09:16:31,601 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 09:16:31,656 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:31,656 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:31,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:31,661 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:31,669 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:31,669 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:31,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-28 09:16:31,692 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:31,692 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 09:16:31,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:31,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:31,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:31,719 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:31,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-28 09:16:31,725 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:31,725 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:31,738 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:31,739 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 09:16:31,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:31,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:31,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:31,769 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:31,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-28 09:16:31,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:31,771 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:31,780 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:31,780 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret7=1} Honda state: {fibonacci_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 09:16:31,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:31,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:31,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:31,802 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:31,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-28 09:16:31,803 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:31,803 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:31,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:31,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:31,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:31,851 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:31,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-28 09:16:31,852 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:31,852 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:32,644 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:32,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-10-28 09:16:32,647 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:32,647 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:32,647 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:32,647 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:32,647 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:32,647 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:32,647 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:32,647 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:32,648 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration5_Loop [2021-10-28 09:16:32,648 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:32,648 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:32,648 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 09:16:32,656 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 09:16:32,660 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 09:16:32,675 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 09:16:32,726 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:32,726 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:32,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:32,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:32,727 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:32,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-28 09:16:32,738 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 09:16:32,745 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:32,745 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:32,745 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:32,745 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:32,745 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:32,747 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:32,747 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:32,749 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:32,752 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:16:32,752 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:16:32,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:32,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:32,754 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:32,755 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:32,755 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:32,755 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:32,755 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-28 09:16:32,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-28 09:16:32,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2021-10-28 09:16:32,776 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:32,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:16:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:33,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:33,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 09:16:33,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:33,496 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 09:16:33,497 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 09:16:33,497 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 09:16:33,745 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 247 states and 344 transitions. Complement of second has 45 states. [2021-10-28 09:16:33,746 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 09:16:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 09:16:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2021-10-28 09:16:33,747 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 32 letters. Loop has 22 letters. [2021-10-28 09:16:33,748 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:33,748 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:33,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:33,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:16:33,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:34,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 09:16:34,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:34,396 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 09:16:34,397 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 09:16:34,397 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 09:16:34,567 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 308 states and 417 transitions. Complement of second has 25 states. [2021-10-28 09:16:34,570 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 09:16:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 09:16:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2021-10-28 09:16:34,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 32 letters. Loop has 22 letters. [2021-10-28 09:16:34,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:34,571 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:34,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:16:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:35,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 09:16:35,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:35,236 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 09:16:35,237 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 09:16:35,237 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 09:16:35,531 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 156 transitions. cyclomatic complexity: 48. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1129 states and 1571 transitions. Complement of second has 138 states. [2021-10-28 09:16:35,531 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 09:16:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-28 09:16:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2021-10-28 09:16:35,533 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 32 letters. Loop has 22 letters. [2021-10-28 09:16:35,534 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:35,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 54 letters. Loop has 22 letters. [2021-10-28 09:16:35,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:35,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 32 letters. Loop has 44 letters. [2021-10-28 09:16:35,539 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:35,539 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1129 states and 1571 transitions. [2021-10-28 09:16:35,561 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2021-10-28 09:16:35,578 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1129 states to 638 states and 970 transitions. [2021-10-28 09:16:35,579 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 258 [2021-10-28 09:16:35,580 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 287 [2021-10-28 09:16:35,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 638 states and 970 transitions. [2021-10-28 09:16:35,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:35,581 INFO L681 BuchiCegarLoop]: Abstraction has 638 states and 970 transitions. [2021-10-28 09:16:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states and 970 transitions. [2021-10-28 09:16:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 469. [2021-10-28 09:16:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 286 states have (on average 1.2027972027972027) internal successors, (344), 306 states have internal predecessors, (344), 107 states have call successors, (121), 56 states have call predecessors, (121), 76 states have return successors, (212), 106 states have call predecessors, (212), 105 states have call successors, (212) [2021-10-28 09:16:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 677 transitions. [2021-10-28 09:16:35,625 INFO L704 BuchiCegarLoop]: Abstraction has 469 states and 677 transitions. [2021-10-28 09:16:35,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:16:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:16:35,626 INFO L87 Difference]: Start difference. First operand 469 states and 677 transitions. Second operand has 14 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-28 09:16:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:35,849 INFO L93 Difference]: Finished difference Result 529 states and 758 transitions. [2021-10-28 09:16:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:16:35,850 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 529 states and 758 transitions. [2021-10-28 09:16:35,862 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-28 09:16:35,875 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 529 states to 526 states and 751 transitions. [2021-10-28 09:16:35,875 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2021-10-28 09:16:35,876 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 233 [2021-10-28 09:16:35,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 526 states and 751 transitions. [2021-10-28 09:16:35,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:35,876 INFO L681 BuchiCegarLoop]: Abstraction has 526 states and 751 transitions. [2021-10-28 09:16:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states and 751 transitions. [2021-10-28 09:16:35,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 486. [2021-10-28 09:16:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 296 states have (on average 1.1993243243243243) internal successors, (355), 317 states have internal predecessors, (355), 112 states have call successors, (126), 58 states have call predecessors, (126), 78 states have return successors, (217), 110 states have call predecessors, (217), 108 states have call successors, (217) [2021-10-28 09:16:35,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 698 transitions. [2021-10-28 09:16:35,917 INFO L704 BuchiCegarLoop]: Abstraction has 486 states and 698 transitions. [2021-10-28 09:16:35,917 INFO L587 BuchiCegarLoop]: Abstraction has 486 states and 698 transitions. [2021-10-28 09:16:35,917 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 09:16:35,917 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 486 states and 698 transitions. [2021-10-28 09:16:35,922 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-28 09:16:35,922 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:35,922 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:35,924 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:35,924 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:16:35,924 INFO L791 eck$LassoCheckResult]: Stem: 4975#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); 4976#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 4945#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 4981#fibonacciENTRY ~n := #in~n; 5014#L17 assume !(~n < 1); 5013#L19 assume !(1 == ~n); 5009#L22 call #t~ret7 := fibonacci(~n - 1);< 5012#fibonacciENTRY ~n := #in~n; 5011#L17 assume !(~n < 1); 5010#L19 assume !(1 == ~n); 5006#L22 call #t~ret7 := fibonacci(~n - 1);< 5008#fibonacciENTRY ~n := #in~n; 5007#L17 assume !(~n < 1); 5005#L19 assume !(1 == ~n); 4989#L22 call #t~ret7 := fibonacci(~n - 1);< 5002#fibonacciENTRY ~n := #in~n; 5003#L17 assume !(~n < 1); 5029#L19 assume !(1 == ~n); 4990#L22 call #t~ret7 := fibonacci(~n - 1);< 5002#fibonacciENTRY ~n := #in~n; 5004#L17 assume !(~n < 1); 4988#L19 assume 1 == ~n;#res := 1; 4991#fibonacciFINAL assume true; 5096#fibonacciEXIT >#29#return; 5085#L22-1 call #t~ret8 := fibonacci(~n - 2);< 5090#fibonacciENTRY ~n := #in~n; 5173#L17 assume !(~n < 1); 5098#L19 assume !(1 == ~n); 5099#L22 call #t~ret7 := fibonacci(~n - 1);< 5181#fibonacciENTRY ~n := #in~n; 5208#L17 assume !(~n < 1); 5185#L19 assume !(1 == ~n); 5186#L22 call #t~ret7 := fibonacci(~n - 1);< 5199#fibonacciENTRY [2021-10-28 09:16:35,925 INFO L793 eck$LassoCheckResult]: Loop: 5199#fibonacciENTRY ~n := #in~n; 5204#L17 assume !(~n < 1); 5203#L19 assume !(1 == ~n); 5198#L22 call #t~ret7 := fibonacci(~n - 1);< 5199#fibonacciENTRY [2021-10-28 09:16:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1561489865, now seen corresponding path program 1 times [2021-10-28 09:16:35,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:35,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512897344] [2021-10-28 09:16:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:35,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:36,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-28 09:16:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:16:36,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:36,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512897344] [2021-10-28 09:16:36,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512897344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:36,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824741463] [2021-10-28 09:16:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:36,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:36,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:36,063 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:36,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 09:16:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:16:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 09:16:36,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824741463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:36,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:36,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-10-28 09:16:36,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729163373] [2021-10-28 09:16:36,409 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:36,409 INFO L85 PathProgramCache]: Analyzing trace with hash 927641, now seen corresponding path program 2 times [2021-10-28 09:16:36,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:36,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475534512] [2021-10-28 09:16:36,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:36,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:36,415 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:36,417 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:36,455 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:36,455 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:36,455 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:36,456 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:36,456 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:36,456 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,456 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:36,456 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:36,456 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-10-28 09:16:36,456 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:36,456 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:36,457 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 09:16:36,459 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 09:16:36,461 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 09:16:36,462 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 09:16:36,467 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 09:16:36,500 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:36,501 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:36,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:36,502 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:36,510 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:36,511 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:36,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-28 09:16:36,531 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:36,531 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 09:16:36,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:36,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:36,563 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:36,565 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:36,565 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:36,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-28 09:16:36,583 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:36,583 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 09:16:36,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:36,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:36,623 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:36,627 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:36,627 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:36,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-28 09:16:36,647 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:36,647 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 09:16:36,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:36,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:36,684 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:36,686 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:36,686 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:36,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-28 09:16:36,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:36,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:36,742 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:36,744 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:36,744 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:36,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-28 09:16:36,807 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:36,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:36,814 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:36,814 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:36,814 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:36,814 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:36,814 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:36,814 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,814 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:36,814 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:36,814 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2021-10-28 09:16:36,814 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:36,815 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:36,815 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 09:16:36,817 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 09:16:36,819 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 09:16:36,825 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 09:16:36,827 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 09:16:36,859 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:36,860 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:36,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:36,861 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:36,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-28 09:16:36,886 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 09:16:36,899 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:36,899 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:36,899 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:36,899 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:36,899 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:36,901 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:36,902 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:36,918 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:36,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-10-28 09:16:36,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:36,955 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:36,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-28 09:16:36,957 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 09:16:36,964 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:36,964 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:36,964 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:36,964 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:36,964 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:36,966 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:36,966 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:36,972 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:36,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2021-10-28 09:16:36,991 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:36,993 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:36,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-28 09:16:36,995 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 09:16:37,001 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:37,001 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:37,002 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:37,002 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:37,002 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:37,003 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:37,003 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:37,021 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:37,023 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:16:37,023 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:16:37,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:37,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:37,024 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:37,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-28 09:16:37,032 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:37,032 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:37,032 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:37,032 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2021-10-28 09:16:37,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:37,068 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:16:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:37,354 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 09:16:37,355 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 09:16:37,355 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:37,412 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 499 states and 711 transitions. Complement of second has 13 states. [2021-10-28 09:16:37,415 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 09:16:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-28 09:16:37,416 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 33 letters. Loop has 4 letters. [2021-10-28 09:16:37,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:37,416 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:16:37,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:37,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:37,664 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 09:16:37,665 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 09:16:37,665 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:37,723 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 499 states and 711 transitions. Complement of second has 13 states. [2021-10-28 09:16:37,723 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 09:16:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2021-10-28 09:16:37,724 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 33 letters. Loop has 4 letters. [2021-10-28 09:16:37,724 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:37,724 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 09:16:37,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:37,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:37,945 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 09:16:37,946 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 09:16:37,946 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:38,022 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 486 states and 698 transitions. cyclomatic complexity: 222. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 640 states and 870 transitions. Complement of second has 14 states. [2021-10-28 09:16:38,023 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 09:16:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:38,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2021-10-28 09:16:38,024 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2021-10-28 09:16:38,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:38,024 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 37 letters. Loop has 4 letters. [2021-10-28 09:16:38,025 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:38,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 8 letters. [2021-10-28 09:16:38,025 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:38,025 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 640 states and 870 transitions. [2021-10-28 09:16:38,035 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-28 09:16:38,044 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 640 states to 538 states and 756 transitions. [2021-10-28 09:16:38,044 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 193 [2021-10-28 09:16:38,045 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 202 [2021-10-28 09:16:38,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 538 states and 756 transitions. [2021-10-28 09:16:38,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:38,045 INFO L681 BuchiCegarLoop]: Abstraction has 538 states and 756 transitions. [2021-10-28 09:16:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states and 756 transitions. [2021-10-28 09:16:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 508. [2021-10-28 09:16:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 318 states have (on average 1.1855345911949686) internal successors, (377), 339 states have internal predecessors, (377), 112 states have call successors, (126), 58 states have call predecessors, (126), 78 states have return successors, (217), 110 states have call predecessors, (217), 108 states have call successors, (217) [2021-10-28 09:16:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 720 transitions. [2021-10-28 09:16:38,068 INFO L704 BuchiCegarLoop]: Abstraction has 508 states and 720 transitions. [2021-10-28 09:16:38,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 09:16:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-28 09:16:38,069 INFO L87 Difference]: Start difference. First operand 508 states and 720 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:38,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:38,303 INFO L93 Difference]: Finished difference Result 575 states and 818 transitions. [2021-10-28 09:16:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:16:38,303 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 575 states and 818 transitions. [2021-10-28 09:16:38,313 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-28 09:16:38,323 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 575 states to 565 states and 805 transitions. [2021-10-28 09:16:38,324 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 215 [2021-10-28 09:16:38,324 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 215 [2021-10-28 09:16:38,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 565 states and 805 transitions. [2021-10-28 09:16:38,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:38,325 INFO L681 BuchiCegarLoop]: Abstraction has 565 states and 805 transitions. [2021-10-28 09:16:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states and 805 transitions. [2021-10-28 09:16:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 531. [2021-10-28 09:16:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 331 states have (on average 1.1812688821752266) internal successors, (391), 354 states have internal predecessors, (391), 121 states have call successors, (135), 62 states have call predecessors, (135), 79 states have return successors, (229), 114 states have call predecessors, (229), 115 states have call successors, (229) [2021-10-28 09:16:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 755 transitions. [2021-10-28 09:16:38,349 INFO L704 BuchiCegarLoop]: Abstraction has 531 states and 755 transitions. [2021-10-28 09:16:38,350 INFO L587 BuchiCegarLoop]: Abstraction has 531 states and 755 transitions. [2021-10-28 09:16:38,350 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 09:16:38,350 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 531 states and 755 transitions. [2021-10-28 09:16:38,355 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-28 09:16:38,355 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:38,355 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:38,356 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:38,356 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:16:38,357 INFO L791 eck$LassoCheckResult]: Stem: 8705#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(14);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 8706#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 8714#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 8715#fibonacciENTRY ~n := #in~n; 8752#L17 assume !(~n < 1); 8750#L19 assume !(1 == ~n); 8747#L22 call #t~ret7 := fibonacci(~n - 1);< 8748#fibonacciENTRY ~n := #in~n; 8765#L17 assume !(~n < 1); 8763#L19 assume !(1 == ~n); 8759#L22 call #t~ret7 := fibonacci(~n - 1);< 8762#fibonacciENTRY ~n := #in~n; 8780#L17 assume !(~n < 1); 8779#L19 assume !(1 == ~n); 8755#L22 call #t~ret7 := fibonacci(~n - 1);< 8760#fibonacciENTRY ~n := #in~n; 8936#L17 assume !(~n < 1); 8873#L19 assume !(1 == ~n); 8776#L22 call #t~ret7 := fibonacci(~n - 1);< 8786#fibonacciENTRY ~n := #in~n; 8798#L17 assume !(~n < 1); 8795#L19 assume !(1 == ~n); 8775#L22 call #t~ret7 := fibonacci(~n - 1);< 8786#fibonacciENTRY ~n := #in~n; 8819#L17 assume !(~n < 1); 8843#L19 assume 1 == ~n;#res := 1; 8840#fibonacciFINAL assume true; 8820#fibonacciEXIT >#29#return; 8813#L22-1 call #t~ret8 := fibonacci(~n - 2);< 8818#fibonacciENTRY ~n := #in~n; 9046#L17 assume !(~n < 1); 9035#L19 assume !(1 == ~n); 8737#L22 call #t~ret7 := fibonacci(~n - 1);< 8736#fibonacciENTRY ~n := #in~n; 8740#L17 assume !(~n < 1); 9167#L19 assume !(1 == ~n); 8722#L22 call #t~ret7 := fibonacci(~n - 1);< 8733#fibonacciENTRY ~n := #in~n; 8734#L17 assume !(~n < 1); 9166#L19 assume !(1 == ~n); 8721#L22 [2021-10-28 09:16:38,357 INFO L793 eck$LassoCheckResult]: Loop: 8721#L22 call #t~ret7 := fibonacci(~n - 1);< 8733#fibonacciENTRY ~n := #in~n; 8734#L17 assume !(~n < 1); 9166#L19 assume !(1 == ~n); 8721#L22 [2021-10-28 09:16:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:38,357 INFO L85 PathProgramCache]: Analyzing trace with hash 382930005, now seen corresponding path program 2 times [2021-10-28 09:16:38,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:38,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784014323] [2021-10-28 09:16:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:38,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:38,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 09:16:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 09:16:38,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:38,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784014323] [2021-10-28 09:16:38,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784014323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:38,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656203334] [2021-10-28 09:16:38,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:16:38,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:38,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:38,491 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:38,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-28 09:16:38,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:16:38,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:16:38,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:16:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-28 09:16:38,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656203334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:38,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:38,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-10-28 09:16:38,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300855416] [2021-10-28 09:16:38,900 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 3 times [2021-10-28 09:16:38,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:38,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323320552] [2021-10-28 09:16:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:38,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:38,908 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:38,911 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:38,954 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:38,954 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:38,955 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:38,955 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:38,955 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:38,955 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:38,955 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:38,955 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:38,955 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2021-10-28 09:16:38,955 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:38,955 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:38,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:38,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:38,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:38,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:39,008 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:39,008 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:39,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:39,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:39,009 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:39,023 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:39,023 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:39,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-28 09:16:39,043 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:39,043 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 09:16:39,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:39,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:39,079 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:39,081 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:39,081 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:39,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-28 09:16:39,102 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:39,102 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 09:16:39,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:39,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:39,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:39,139 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:39,141 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:39,141 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:39,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-28 09:16:39,160 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:39,160 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 09:16:39,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:39,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:39,198 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:39,200 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:39,201 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:39,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-28 09:16:39,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:39,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:39,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:39,241 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:39,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-28 09:16:39,244 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:39,244 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:45,075 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:45,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:45,078 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:45,078 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:45,078 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:45,078 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:45,079 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:45,079 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:45,079 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:45,079 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:45,079 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2021-10-28 09:16:45,079 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:45,079 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:45,079 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 09:16:45,081 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 09:16:45,082 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 09:16:45,084 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 09:16:45,124 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:45,124 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:45,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:45,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:45,126 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:45,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-28 09:16:45,128 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 09:16:45,135 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:45,135 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:45,135 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:45,135 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:45,135 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:45,136 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:45,136 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:45,137 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:45,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:45,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:45,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:45,166 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:45,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-28 09:16:45,170 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 09:16:45,177 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:45,177 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:45,177 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:45,177 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:45,177 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:45,178 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:45,178 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:45,179 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:45,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:45,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:45,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:45,202 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:45,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-28 09:16:45,203 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 09:16:45,210 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:45,210 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:45,210 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:45,210 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:45,210 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:45,211 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:45,211 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:45,212 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:45,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2021-10-28 09:16:45,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:45,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:45,233 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:45,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-28 09:16:45,234 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 09:16:45,243 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:45,243 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:45,243 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:45,244 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:45,244 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:45,245 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:45,245 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:45,262 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:45,266 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:16:45,267 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:16:45,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:45,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:45,275 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:45,277 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:45,277 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:45,277 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:45,277 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-28 09:16:45,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-28 09:16:45,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:45,312 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:45,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:16:45,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:45,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:45,628 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 09:16:45,629 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 09:16:45,629 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 531 states and 755 transitions. cyclomatic complexity: 234 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:45,694 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 531 states and 755 transitions. cyclomatic complexity: 234. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 546 states and 771 transitions. Complement of second has 18 states. [2021-10-28 09:16:45,695 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 09:16:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-28 09:16:45,696 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 40 letters. Loop has 4 letters. [2021-10-28 09:16:45,696 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:45,696 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:45,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:16:45,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:45,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:46,002 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 09:16:46,003 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 09:16:46,003 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 531 states and 755 transitions. cyclomatic complexity: 234 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:46,095 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 531 states and 755 transitions. cyclomatic complexity: 234. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 776 states and 1087 transitions. Complement of second has 22 states. [2021-10-28 09:16:46,096 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 09:16:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-28 09:16:46,097 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2021-10-28 09:16:46,097 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:46,098 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 44 letters. Loop has 4 letters. [2021-10-28 09:16:46,098 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:46,098 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 8 letters. [2021-10-28 09:16:46,098 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:46,098 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 776 states and 1087 transitions. [2021-10-28 09:16:46,112 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-28 09:16:46,125 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 776 states to 709 states and 1015 transitions. [2021-10-28 09:16:46,125 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 235 [2021-10-28 09:16:46,126 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2021-10-28 09:16:46,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 709 states and 1015 transitions. [2021-10-28 09:16:46,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:46,127 INFO L681 BuchiCegarLoop]: Abstraction has 709 states and 1015 transitions. [2021-10-28 09:16:46,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states and 1015 transitions. [2021-10-28 09:16:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 692. [2021-10-28 09:16:46,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 439 states have (on average 1.1548974943052392) internal successors, (507), 468 states have internal predecessors, (507), 154 states have call successors, (186), 89 states have call predecessors, (186), 99 states have return successors, (297), 134 states have call predecessors, (297), 148 states have call successors, (297) [2021-10-28 09:16:46,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 990 transitions. [2021-10-28 09:16:46,157 INFO L704 BuchiCegarLoop]: Abstraction has 692 states and 990 transitions. [2021-10-28 09:16:46,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:46,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:16:46,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:16:46,159 INFO L87 Difference]: Start difference. First operand 692 states and 990 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:16:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:46,455 INFO L93 Difference]: Finished difference Result 780 states and 1112 transitions. [2021-10-28 09:16:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:16:46,459 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 780 states and 1112 transitions. [2021-10-28 09:16:46,473 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-28 09:16:46,488 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 780 states to 765 states and 1091 transitions. [2021-10-28 09:16:46,488 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 275 [2021-10-28 09:16:46,489 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 275 [2021-10-28 09:16:46,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 765 states and 1091 transitions. [2021-10-28 09:16:46,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:46,490 INFO L681 BuchiCegarLoop]: Abstraction has 765 states and 1091 transitions. [2021-10-28 09:16:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states and 1091 transitions. [2021-10-28 09:16:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 747. [2021-10-28 09:16:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 471 states have (on average 1.1464968152866242) internal successors, (540), 511 states have internal predecessors, (540), 165 states have call successors, (197), 95 states have call predecessors, (197), 111 states have return successors, (322), 140 states have call predecessors, (322), 158 states have call successors, (322) [2021-10-28 09:16:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1059 transitions. [2021-10-28 09:16:46,520 INFO L704 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-28 09:16:46,520 INFO L587 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-28 09:16:46,520 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 09:16:46,521 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 747 states and 1059 transitions. [2021-10-28 09:16:46,527 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-28 09:16:46,527 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:46,527 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:46,528 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:16:46,528 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:16:46,529 INFO L791 eck$LassoCheckResult]: Stem: 12516#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); 12517#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 12522#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 12523#fibonacciENTRY ~n := #in~n; 12580#L17 assume !(~n < 1); 12581#L19 assume !(1 == ~n); 12575#L22 call #t~ret7 := fibonacci(~n - 1);< 12576#fibonacciENTRY ~n := #in~n; 12599#L17 assume !(~n < 1); 12578#L19 assume !(1 == ~n); 12573#L22 call #t~ret7 := fibonacci(~n - 1);< 12598#fibonacciENTRY ~n := #in~n; 12596#L17 assume !(~n < 1); 12594#L19 assume !(1 == ~n); 12583#L22 call #t~ret7 := fibonacci(~n - 1);< 12591#fibonacciENTRY ~n := #in~n; 12597#L17 assume !(~n < 1); 12595#L19 assume !(1 == ~n); 12587#L22 call #t~ret7 := fibonacci(~n - 1);< 12593#fibonacciENTRY ~n := #in~n; 12636#L17 assume !(~n < 1); 12635#L19 assume !(1 == ~n); 12609#L22 call #t~ret7 := fibonacci(~n - 1);< 12617#fibonacciENTRY ~n := #in~n; 12627#L17 assume !(~n < 1); 12625#L19 assume !(1 == ~n); 12607#L22 call #t~ret7 := fibonacci(~n - 1);< 12624#fibonacciENTRY ~n := #in~n; 12647#L17 assume !(~n < 1); 12646#L19 assume 1 == ~n;#res := 1; 12645#fibonacciFINAL assume true; 12641#fibonacciEXIT >#29#return; 12629#L22-1 call #t~ret8 := fibonacci(~n - 2);< 12631#fibonacciENTRY ~n := #in~n; 12665#L17 assume ~n < 1;#res := 0; 12661#fibonacciFINAL assume true; 12628#fibonacciEXIT >#31#return; 12626#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 12623#fibonacciFINAL assume true; 12616#fibonacciEXIT >#29#return; 12602#L22-1 call #t~ret8 := fibonacci(~n - 2);< 12613#fibonacciENTRY ~n := #in~n; 12670#L17 assume !(~n < 1); 12637#L19 assume !(1 == ~n); 12639#L22 call #t~ret7 := fibonacci(~n - 1);< 12664#fibonacciENTRY ~n := #in~n; 12811#L17 assume !(~n < 1); 12809#L19 assume !(1 == ~n); 12773#L22 call #t~ret7 := fibonacci(~n - 1);< 12776#fibonacciENTRY ~n := #in~n; 12924#L17 assume !(~n < 1); 12919#L19 assume !(1 == ~n); 12774#L22 [2021-10-28 09:16:46,529 INFO L793 eck$LassoCheckResult]: Loop: 12774#L22 call #t~ret7 := fibonacci(~n - 1);< 12776#fibonacciENTRY ~n := #in~n; 12924#L17 assume !(~n < 1); 12919#L19 assume !(1 == ~n); 12774#L22 [2021-10-28 09:16:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:46,529 INFO L85 PathProgramCache]: Analyzing trace with hash -38598875, now seen corresponding path program 3 times [2021-10-28 09:16:46,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:46,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538604059] [2021-10-28 09:16:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:46,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:46,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-28 09:16:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:46,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:46,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 84 proven. 91 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:16:46,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:46,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538604059] [2021-10-28 09:16:46,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538604059] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:46,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865819146] [2021-10-28 09:16:46,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:16:46,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:46,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:46,739 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:46,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-28 09:16:47,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-28 09:16:47,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:16:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 09:16:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-10-28 09:16:47,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865819146] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:47,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:47,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 24 [2021-10-28 09:16:47,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538599944] [2021-10-28 09:16:47,311 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 4 times [2021-10-28 09:16:47,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:47,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164069329] [2021-10-28 09:16:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:47,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:47,319 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:47,321 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:47,371 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:47,371 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:47,371 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:47,371 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:47,372 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:47,372 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:47,372 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:47,372 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:47,372 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2021-10-28 09:16:47,372 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:47,372 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:47,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:47,381 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 09:16:47,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:47,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:16:47,423 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:47,423 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:47,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:47,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:47,425 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:47,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-10-28 09:16:47,426 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:47,426 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:47,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Ended with exit code 0 [2021-10-28 09:16:47,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:47,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:47,462 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:47,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-28 09:16:47,463 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:47,463 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:54,460 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:16:54,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:54,469 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:54,469 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:54,469 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:54,469 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:54,469 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:16:54,469 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:54,469 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:54,470 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:54,470 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2021-10-28 09:16:54,470 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:54,470 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:54,470 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 09:16:54,472 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 09:16:54,480 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 09:16:54,483 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 09:16:54,529 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:54,530 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:16:54,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:54,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:54,531 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:54,544 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 09:16:54,555 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:54,556 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:54,556 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:54,556 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:54,556 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:54,557 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:54,557 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:54,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-10-28 09:16:54,566 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:16:54,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:54,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:54,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:54,607 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:54,613 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 09:16:54,622 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:16:54,623 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:16:54,623 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:16:54,623 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:16:54,623 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:16:54,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:16:54,624 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:16:54,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-28 09:16:54,634 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:16:54,647 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 09:16:54,647 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 09:16:54,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:54,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:54,649 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:54,651 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:16:54,652 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:16:54,652 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:16:54,652 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-28 09:16:54,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-28 09:16:54,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:54,689 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:16:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:16:54,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:54,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:55,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:55,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:55,259 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 09:16:55,260 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 09:16:55,260 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:16:55,332 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 769 states and 1082 transitions. Complement of second has 18 states. [2021-10-28 09:16:55,332 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 09:16:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:16:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-28 09:16:55,333 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 52 letters. Loop has 4 letters. [2021-10-28 09:16:55,334 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:55,334 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:16:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:55,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:55,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:55,955 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 09:16:55,957 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 09:16:55,957 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:16:56,042 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 954 states and 1301 transitions. Complement of second has 22 states. [2021-10-28 09:16:56,044 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 09:16:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:16:56,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-28 09:16:56,044 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 52 letters. Loop has 4 letters. [2021-10-28 09:16:56,045 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:56,045 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:16:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:56,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:16:56,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:56,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:16:56,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:56,515 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 09:16:56,516 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 09:16:56,516 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:16:56,580 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 747 states and 1059 transitions. cyclomatic complexity: 325. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 1015 states and 1404 transitions. Complement of second has 27 states. [2021-10-28 09:16:56,580 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 09:16:56,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:16:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-28 09:16:56,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2021-10-28 09:16:56,583 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:56,583 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 56 letters. Loop has 4 letters. [2021-10-28 09:16:56,583 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:56,584 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 8 letters. [2021-10-28 09:16:56,584 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:16:56,584 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1015 states and 1404 transitions. [2021-10-28 09:16:56,596 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2021-10-28 09:16:56,606 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1015 states to 747 states and 1059 transitions. [2021-10-28 09:16:56,606 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 220 [2021-10-28 09:16:56,608 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 256 [2021-10-28 09:16:56,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 747 states and 1059 transitions. [2021-10-28 09:16:56,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:56,608 INFO L681 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-28 09:16:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states and 1059 transitions. [2021-10-28 09:16:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 747. [2021-10-28 09:16:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 471 states have (on average 1.1464968152866242) internal successors, (540), 511 states have internal predecessors, (540), 165 states have call successors, (197), 95 states have call predecessors, (197), 111 states have return successors, (322), 140 states have call predecessors, (322), 158 states have call successors, (322) [2021-10-28 09:16:56,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1059 transitions. [2021-10-28 09:16:56,661 INFO L704 BuchiCegarLoop]: Abstraction has 747 states and 1059 transitions. [2021-10-28 09:16:56,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:16:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 09:16:56,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:16:56,662 INFO L87 Difference]: Start difference. First operand 747 states and 1059 transitions. Second operand has 24 states, 21 states have (on average 2.142857142857143) internal successors, (45), 15 states have internal predecessors, (45), 15 states have call successors, (17), 10 states have call predecessors, (17), 3 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-10-28 09:16:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:16:57,024 INFO L93 Difference]: Finished difference Result 428 states and 553 transitions. [2021-10-28 09:16:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 09:16:57,025 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 428 states and 553 transitions. [2021-10-28 09:16:57,030 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 09:16:57,035 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 428 states to 368 states and 488 transitions. [2021-10-28 09:16:57,035 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 152 [2021-10-28 09:16:57,036 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 168 [2021-10-28 09:16:57,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 368 states and 488 transitions. [2021-10-28 09:16:57,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:16:57,037 INFO L681 BuchiCegarLoop]: Abstraction has 368 states and 488 transitions. [2021-10-28 09:16:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states and 488 transitions. [2021-10-28 09:16:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 324. [2021-10-28 09:16:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 210 states have internal predecessors, (221), 73 states have call successors, (82), 41 states have call predecessors, (82), 48 states have return successors, (130), 72 states have call predecessors, (130), 65 states have call successors, (130) [2021-10-28 09:16:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 433 transitions. [2021-10-28 09:16:57,049 INFO L704 BuchiCegarLoop]: Abstraction has 324 states and 433 transitions. [2021-10-28 09:16:57,049 INFO L587 BuchiCegarLoop]: Abstraction has 324 states and 433 transitions. [2021-10-28 09:16:57,049 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-28 09:16:57,049 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 324 states and 433 transitions. [2021-10-28 09:16:57,052 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 09:16:57,052 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:16:57,052 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:16:57,053 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 09:16:57,053 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-28 09:16:57,054 INFO L791 eck$LassoCheckResult]: Stem: 18028#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); 18029#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 9; 18034#L29 call main_#t~ret9 := fibonacci(main_~x~0);< 18035#fibonacciENTRY ~n := #in~n; 18137#L17 assume !(~n < 1); 18136#L19 assume !(1 == ~n); 18112#L22 call #t~ret7 := fibonacci(~n - 1);< 18133#fibonacciENTRY ~n := #in~n; 18122#L17 assume !(~n < 1); 18119#L19 assume !(1 == ~n); 18114#L22 call #t~ret7 := fibonacci(~n - 1);< 18115#fibonacciENTRY ~n := #in~n; 18134#L17 assume !(~n < 1); 18131#L19 assume !(1 == ~n); 18128#L22 call #t~ret7 := fibonacci(~n - 1);< 18130#fibonacciENTRY ~n := #in~n; 18277#L17 assume !(~n < 1); 18142#L19 assume !(1 == ~n); 18124#L22 call #t~ret7 := fibonacci(~n - 1);< 18141#fibonacciENTRY ~n := #in~n; 18184#L17 assume !(~n < 1); 18183#L19 assume !(1 == ~n); 18145#L22 call #t~ret7 := fibonacci(~n - 1);< 18178#fibonacciENTRY ~n := #in~n; 18182#L17 assume !(~n < 1); 18181#L19 assume !(1 == ~n); 18147#L22 call #t~ret7 := fibonacci(~n - 1);< 18178#fibonacciENTRY ~n := #in~n; 18182#L17 assume !(~n < 1); 18181#L19 assume !(1 == ~n); 18147#L22 call #t~ret7 := fibonacci(~n - 1);< 18178#fibonacciENTRY ~n := #in~n; 18182#L17 assume !(~n < 1); 18181#L19 assume !(1 == ~n); 18147#L22 call #t~ret7 := fibonacci(~n - 1);< 18179#fibonacciENTRY ~n := #in~n; 18296#L17 assume !(~n < 1); 18295#L19 assume 1 == ~n;#res := 1; 18294#fibonacciFINAL assume true; 18291#fibonacciEXIT >#29#return; 18288#L22-1 call #t~ret8 := fibonacci(~n - 2);< 18290#fibonacciENTRY ~n := #in~n; 18298#L17 assume ~n < 1;#res := 0; 18297#fibonacciFINAL assume true; 18287#fibonacciEXIT >#31#return; 18286#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 18285#fibonacciFINAL assume true; 18282#fibonacciEXIT >#29#return; 18233#L22-1 call #t~ret8 := fibonacci(~n - 2);< 18236#fibonacciENTRY ~n := #in~n; 18250#L17 assume !(~n < 1); 18249#L19 assume 1 == ~n;#res := 1; 18050#fibonacciFINAL assume true; 18232#fibonacciEXIT >#31#return; 18229#L22-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 18177#fibonacciFINAL assume true; 18170#fibonacciEXIT >#29#return; 17996#L22-1 call #t~ret8 := fibonacci(~n - 2);< 18152#fibonacciENTRY ~n := #in~n; 18059#L17 assume !(~n < 1); 18049#L19 assume !(1 == ~n); 18037#L22 call #t~ret7 := fibonacci(~n - 1);< 18099#fibonacciENTRY ~n := #in~n; 18101#L17 assume !(~n < 1); 18094#L19 assume !(1 == ~n); 18061#L22 call #t~ret7 := fibonacci(~n - 1);< 18065#fibonacciENTRY ~n := #in~n; 18088#L17 assume !(~n < 1); 18083#L19 assume !(1 == ~n); 18063#L22 [2021-10-28 09:16:57,054 INFO L793 eck$LassoCheckResult]: Loop: 18063#L22 call #t~ret7 := fibonacci(~n - 1);< 18065#fibonacciENTRY ~n := #in~n; 18088#L17 assume !(~n < 1); 18083#L19 assume !(1 == ~n); 18063#L22 [2021-10-28 09:16:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1676674629, now seen corresponding path program 4 times [2021-10-28 09:16:57,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:57,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294081624] [2021-10-28 09:16:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:57,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:57,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-10-28 09:16:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:57,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:57,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-10-28 09:16:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:57,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-10-28 09:16:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:57,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-10-28 09:16:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:16:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:16:57,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:16:57,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294081624] [2021-10-28 09:16:57,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294081624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:57,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227127888] [2021-10-28 09:16:57,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:16:57,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:16:57,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:57,283 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:16:57,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-28 09:16:57,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:16:57,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:16:57,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 09:16:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:16:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 184 proven. 96 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-10-28 09:16:58,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227127888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:16:58,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:16:58,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 22 [2021-10-28 09:16:58,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235346756] [2021-10-28 09:16:58,077 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:16:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:16:58,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1757801, now seen corresponding path program 5 times [2021-10-28 09:16:58,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:16:58,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599455860] [2021-10-28 09:16:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:16:58,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:16:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:58,084 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:16:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:16:58,086 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:16:58,134 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:16:58,135 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:16:58,135 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:16:58,135 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:16:58,135 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:16:58,135 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:58,135 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:16:58,135 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:16:58,135 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2021-10-28 09:16:58,136 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:16:58,136 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:16:58,136 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 09:16:58,138 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 09:16:58,140 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 09:16:58,147 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 09:16:58,185 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:16:58,185 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:16:58,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:58,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:58,186 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:58,188 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:58,188 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:58,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-28 09:16:58,215 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:58,215 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 09:16:58,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:58,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:58,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:58,251 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:58,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:58,253 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:58,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-28 09:16:58,263 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:16:58,263 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 09:16:58,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Forceful destruction successful, exit code 0 [2021-10-28 09:16:58,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:58,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:58,287 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:58,289 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:16:58,289 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:16:58,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-28 09:16:58,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2021-10-28 09:16:58,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:16:58,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:16:58,325 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:16:58,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-28 09:16:58,326 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:16:58,326 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:17:04,420 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:17:04,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2021-10-28 09:17:04,424 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:17:04,424 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:17:04,424 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:17:04,424 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:17:04,424 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:17:04,424 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:17:04,424 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:17:04,424 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:17:04,424 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2021-10-28 09:17:04,424 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:17:04,424 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:17:04,425 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 09:17:04,431 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 09:17:04,433 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 09:17:04,434 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 09:17:04,470 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:17:04,471 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:17:04,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:17:04,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:17:04,472 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:17:04,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2021-10-28 09:17:04,480 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 09:17:04,488 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:17:04,488 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:17:04,488 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:17:04,488 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:17:04,488 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:17:04,491 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:17:04,491 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:17:04,494 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:17:04,495 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-28 09:17:04,495 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 09:17:04,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:17:04,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:17:04,497 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:17:04,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2021-10-28 09:17:04,497 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:17:04,497 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:17:04,498 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:17:04,498 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2021-10-28 09:17:04,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Forceful destruction successful, exit code 0 [2021-10-28 09:17:04,517 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:17:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:17:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:17:04,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:17:05,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2021-10-28 09:17:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:17:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:17:05,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:17:05,406 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 09:17:05,407 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 09:17:05,407 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:17:05,456 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 343 states and 453 transitions. Complement of second has 18 states. [2021-10-28 09:17:05,457 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 09:17:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:17:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-10-28 09:17:05,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2021-10-28 09:17:05,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:17:05,457 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:17:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:05,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:17:05,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:17:05,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:17:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:17:06,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:17:06,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:17:06,304 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 09:17:06,305 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 09:17:06,305 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:17:06,413 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 349 states and 459 transitions. Complement of second has 17 states. [2021-10-28 09:17:06,413 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 09:17:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:17:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-10-28 09:17:06,414 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2021-10-28 09:17:06,414 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:17:06,414 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:17:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:17:06,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:17:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:17:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:17:07,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:17:07,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:17:07,237 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 09:17:07,237 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 09:17:07,238 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:17:07,296 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 324 states and 433 transitions. cyclomatic complexity: 113. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 430 states and 563 transitions. Complement of second has 27 states. [2021-10-28 09:17:07,297 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 09:17:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 09:17:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-10-28 09:17:07,299 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2021-10-28 09:17:07,301 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:17:07,301 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2021-10-28 09:17:07,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:17:07,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2021-10-28 09:17:07,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:17:07,304 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 430 states and 563 transitions. [2021-10-28 09:17:07,308 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-28 09:17:07,316 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 430 states to 332 states and 443 transitions. [2021-10-28 09:17:07,316 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2021-10-28 09:17:07,317 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2021-10-28 09:17:07,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 332 states and 443 transitions. [2021-10-28 09:17:07,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:17:07,317 INFO L681 BuchiCegarLoop]: Abstraction has 332 states and 443 transitions. [2021-10-28 09:17:07,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states and 443 transitions. [2021-10-28 09:17:07,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 324. [2021-10-28 09:17:07,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 203 states have (on average 1.0886699507389161) internal successors, (221), 210 states have internal predecessors, (221), 73 states have call successors, (82), 41 states have call predecessors, (82), 48 states have return successors, (130), 72 states have call predecessors, (130), 65 states have call successors, (130) [2021-10-28 09:17:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 433 transitions. [2021-10-28 09:17:07,328 INFO L704 BuchiCegarLoop]: Abstraction has 324 states and 433 transitions. [2021-10-28 09:17:07,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:17:07,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:17:07,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:17:07,330 INFO L87 Difference]: Start difference. First operand 324 states and 433 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (13), 11 states have call predecessors, (13), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 09:17:07,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:17:07,678 INFO L93 Difference]: Finished difference Result 407 states and 502 transitions. [2021-10-28 09:17:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:17:07,678 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 407 states and 502 transitions. [2021-10-28 09:17:07,683 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 09:17:07,683 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 407 states to 0 states and 0 transitions. [2021-10-28 09:17:07,683 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-28 09:17:07,684 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-28 09:17:07,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-28 09:17:07,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:17:07,684 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:17:07,684 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:17:07,684 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:17:07,684 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-28 09:17:07,684 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:17:07,685 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-28 09:17:07,685 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-28 09:17:07,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 09:17:07 BoogieIcfgContainer [2021-10-28 09:17:07,693 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 09:17:07,694 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:17:07,694 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:17:07,694 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:17:07,695 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:16:25" (3/4) ... [2021-10-28 09:17:07,698 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 09:17:07,699 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:17:07,700 INFO L168 Benchmark]: Toolchain (without parser) took 42488.95 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 97.1 MB in the beginning and 54.7 MB in the end (delta: 42.4 MB). Peak memory consumption was 100.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:07,701 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory was 58.2 MB in the beginning and 58.2 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:17:07,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.94 ms. Allocated memory is still 130.0 MB. Free memory was 96.8 MB in the beginning and 108.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:07,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.56 ms. Allocated memory is still 130.0 MB. Free memory was 107.8 MB in the beginning and 106.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:07,702 INFO L168 Benchmark]: Boogie Preprocessor took 18.23 ms. Allocated memory is still 130.0 MB. Free memory was 106.5 MB in the beginning and 105.6 MB in the end (delta: 881.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:17:07,702 INFO L168 Benchmark]: RCFGBuilder took 325.28 ms. Allocated memory is still 130.0 MB. Free memory was 105.6 MB in the beginning and 96.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:07,703 INFO L168 Benchmark]: BuchiAutomizer took 41863.43 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 96.0 MB in the beginning and 54.7 MB in the end (delta: 41.3 MB). Peak memory consumption was 100.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:17:07,703 INFO L168 Benchmark]: Witness Printer took 4.82 ms. Allocated memory is still 188.7 MB. Free memory is still 54.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:17:07,705 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory was 58.2 MB in the beginning and 58.2 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 239.94 ms. Allocated memory is still 130.0 MB. Free memory was 96.8 MB in the beginning and 108.2 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.56 ms. Allocated memory is still 130.0 MB. Free memory was 107.8 MB in the beginning and 106.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.23 ms. Allocated memory is still 130.0 MB. Free memory was 106.5 MB in the beginning and 105.6 MB in the end (delta: 881.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 325.28 ms. Allocated memory is still 130.0 MB. Free memory was 105.6 MB in the beginning and 96.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 41863.43 ms. Allocated memory was 130.0 MB in the beginning and 188.7 MB in the end (delta: 58.7 MB). Free memory was 96.0 MB in the beginning and 54.7 MB in the end (delta: 41.3 MB). Peak memory consumption was 100.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.82 ms. Allocated memory is still 188.7 MB. Free memory is still 54.7 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 15 terminating modules (8 trivial, 3 deterministic, 4 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 9 locations. One deterministic module has affine ranking function n and consists of 7 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. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 41.8s and 10 iterations. TraceHistogramMax:14. Analysis of lassos took 28.9s. Construction of modules took 1.4s. Büchi inclusion checks took 10.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 14. Automata minimization 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 391 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 747 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 326 SDtfs, 767 SDslu, 583 SDs, 0 SdLazy, 1966 SolverSat, 509 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT6 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf98 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq181 hnf93 smp77 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 41ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 15 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 21.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-28 09:17:07,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-28 09:17:07,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-10-28 09:17:08,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-28 09:17:08,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-28 09:17:08,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:17:08,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-28 09:17:08,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-28 09:17:09,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-28 09:17:09,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_157bfda2-d423-48b8-83d4-0829ca6eb750/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...