./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer --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 23bbff91fb2bcbd238fb97db06c7d4983c05a850 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:20:40,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:20:40,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:20:40,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:20:40,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:20:40,953 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:20:40,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:20:40,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:20:40,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:20:40,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:20:40,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:20:40,964 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:20:40,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:20:40,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:20:40,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:20:40,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:20:40,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:20:40,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:20:40,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:20:40,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:20:40,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:20:40,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:20:40,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:20:40,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:20:41,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:20:41,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:20:41,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:20:41,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:20:41,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:20:41,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:20:41,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:20:41,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:20:41,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:20:41,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:20:41,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:20:41,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:20:41,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:20:41,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:20:41,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:20:41,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:20:41,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:20:41,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-28 03:20:41,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:20:41,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:20:41,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:20:41,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:20:41,075 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:20:41,075 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:20:41,075 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:20:41,076 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:20:41,076 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:20:41,076 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:20:41,077 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:20:41,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:20:41,078 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:20:41,078 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:20:41,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:20:41,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:20:41,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:20:41,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:20:41,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:20:41,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:20:41,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:20:41,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:20:41,080 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:20:41,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:20:41,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:20:41,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:20:41,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:20:41,081 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:20:41,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:20:41,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:20:41,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:20:41,084 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:20:41,086 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:20:41,086 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-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bbff91fb2bcbd238fb97db06c7d4983c05a850 [2020-11-28 03:20:41,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:20:41,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:20:41,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:20:41,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:20:41,466 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:20:41,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-11-28 03:20:41,553 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/data/eb0b61a69/7dcaf7346b12434c973ac48f449c5e5e/FLAG854918dcb [2020-11-28 03:20:42,067 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:20:42,069 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2020-11-28 03:20:42,081 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/data/eb0b61a69/7dcaf7346b12434c973ac48f449c5e5e/FLAG854918dcb [2020-11-28 03:20:42,472 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/data/eb0b61a69/7dcaf7346b12434c973ac48f449c5e5e [2020-11-28 03:20:42,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:20:42,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:20:42,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:20:42,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:20:42,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:20:42,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33581438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42, skipping insertion in model container [2020-11-28 03:20:42,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:20:42,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:20:42,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:20:42,676 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:20:42,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:20:42,715 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:20:42,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42 WrapperNode [2020-11-28 03:20:42,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:20:42,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:20:42,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:20:42,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:20:42,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:20:42,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:20:42,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:20:42,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:20:42,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... [2020-11-28 03:20:42,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:20:42,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:20:42,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:20:42,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:20:42,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:20:42,899 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-28 03:20:42,900 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-28 03:20:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:20:42,900 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-28 03:20:42,903 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-28 03:20:42,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:20:42,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:20:43,106 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:20:43,106 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:20:43,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:43 BoogieIcfgContainer [2020-11-28 03:20:43,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:20:43,109 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:20:43,109 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:20:43,112 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:20:43,113 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:20:43,114 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:20:42" (1/3) ... [2020-11-28 03:20:43,115 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1fd2501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:20:43, skipping insertion in model container [2020-11-28 03:20:43,115 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:20:43,115 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:20:42" (2/3) ... [2020-11-28 03:20:43,116 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1fd2501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:20:43, skipping insertion in model container [2020-11-28 03:20:43,116 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:20:43,116 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:43" (3/3) ... [2020-11-28 03:20:43,118 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-11-28 03:20:43,165 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:20:43,166 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:20:43,166 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:20:43,166 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:20:43,166 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:20:43,166 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:20:43,166 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:20:43,167 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:20:43,179 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-28 03:20:43,199 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:20:43,200 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:20:43,200 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:20:43,205 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:20:43,205 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:43,205 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:20:43,206 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-28 03:20:43,219 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:20:43,219 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:20:43,220 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:20:43,220 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:20:43,220 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:43,228 INFO L794 eck$LassoCheckResult]: Stem: 26#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-11-28 03:20:43,228 INFO L796 eck$LassoCheckResult]: Loop: 27#fibo1ENTRYtrue ~n := #in~n; 4#L10true assume !(~n < 1); 10#L12true assume !(1 == ~n); 13#L15true call #t~ret7 := fibo2(~n - 1);< 15#fibo2ENTRYtrue ~n := #in~n; 28#L20true assume !(~n < 1); 20#L22true assume !(1 == ~n); 9#L25true call #t~ret9 := fibo1(~n - 1);< 27#fibo1ENTRYtrue [2020-11-28 03:20:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-11-28 03:20:43,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:43,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826653050] [2020-11-28 03:20:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:43,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:43,371 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:43,393 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-11-28 03:20:43,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:43,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203882837] [2020-11-28 03:20:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:43,406 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:43,414 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:43,417 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-11-28 03:20:43,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:43,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768842777] [2020-11-28 03:20:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:43,444 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:43,466 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:43,473 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:43,621 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-11-28 03:20:43,848 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:20:43,849 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:20:43,849 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:20:43,849 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:20:43,850 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:20:43,850 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:43,850 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:20:43,850 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:20:43,850 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration1_Loop [2020-11-28 03:20:43,851 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:20:43,851 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:20:43,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:43,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:43,884 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:43,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:43,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:43,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:43,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:43,935 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:43,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:43,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,084 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:20:44,085 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:44,096 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:44,096 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,106 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:44,106 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:44,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:44,151 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,154 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:44,154 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:44,196 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:44,196 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,201 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:44,201 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:44,238 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:44,239 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:44,242 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:44,242 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,268 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:44,268 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:44,271 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:44,271 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:44,318 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:44,318 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,321 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:44,322 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,353 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:44,353 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:44,357 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:44,358 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,384 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:44,384 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:44,397 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:44,397 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,420 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:44,420 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:44,448 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:20:44,452 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,522 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:20:44,524 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:20:44,524 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:20:44,524 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:20:44,524 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:20:44,524 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:20:44,524 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,525 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:20:44,525 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:20:44,525 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration1_Loop [2020-11-28 03:20:44,525 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:20:44,525 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:20:44,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:44,837 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:20:44,842 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:44,850 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:44,853 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:44,853 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:44,854 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:44,854 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:44,854 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:44,856 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:44,856 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,859 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:44,906 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,907 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:44,908 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:44,908 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:44,908 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:44,908 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:44,909 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:44,909 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:44,911 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,935 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:44,936 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:44,937 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:44,937 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:44,937 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:44,937 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:44,938 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:44,938 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:44,955 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:44,978 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:44,979 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:44,979 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:44,979 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:44,979 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:44,980 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:44,980 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:44,980 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:44,982 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:45,008 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:45,009 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:45,009 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:45,009 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:45,009 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:45,010 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:45,010 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:45,011 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:45,012 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:45,078 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:45,080 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:45,080 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:45,080 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:45,080 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:45,080 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:45,081 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:45,082 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:45,084 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:45,118 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:45,120 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:45,120 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:45,120 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:45,120 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:45,121 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:45,121 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:45,121 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:45,122 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:45,145 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:45,146 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:45,146 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:45,146 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:45,146 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:45,146 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:45,147 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:45,147 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:45,149 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:45,172 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:45,174 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:45,174 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:45,175 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:45,175 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:45,175 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:45,177 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:45,177 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:45,186 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:20:45,189 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:20:45,189 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:45,192 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:20:45,192 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:20:45,192 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:20:45,193 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2020-11-28 03:20:45,216 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:20:45,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:45,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:20:45,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:20:45,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:45,473 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-11-28 03:20:45,474 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-11-28 03:20:45,789 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states.. Second operand 6 states. Result 85 states and 117 transitions. Complement of second has 24 states. [2020-11-28 03:20:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:20:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-28 03:20:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-11-28 03:20:45,794 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-28 03:20:45,796 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:45,796 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-11-28 03:20:45,797 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:45,797 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-11-28 03:20:45,797 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:45,798 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-11-28 03:20:45,807 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:20:45,817 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-11-28 03:20:45,818 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-11-28 03:20:45,819 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-11-28 03:20:45,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-11-28 03:20:45,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:45,821 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-11-28 03:20:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-11-28 03:20:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-11-28 03:20:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:20:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-11-28 03:20:45,853 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-28 03:20:45,854 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-28 03:20:45,854 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:20:45,854 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-11-28 03:20:45,857 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:20:45,857 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:20:45,857 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:20:45,862 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:45,862 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:45,863 INFO L794 eck$LassoCheckResult]: Stem: 234#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 230#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 216#L39 call main_#t~ret11 := fibo1(main_~x~0);< 222#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 217#L12 assume !(1 == ~n); 201#L15 call #t~ret7 := fibo2(~n - 1);< 233#fibo2ENTRY ~n := #in~n; 237#L20 assume !(~n < 1); 251#L22 assume !(1 == ~n); 212#L25 call #t~ret9 := fibo1(~n - 1);< 227#fibo1ENTRY ~n := #in~n; 211#L10 assume ~n < 1;#res := 0; 213#fibo1FINAL assume true; 220#fibo1EXIT >#48#return; 221#L25-1 [2020-11-28 03:20:45,863 INFO L796 eck$LassoCheckResult]: Loop: 221#L25-1 call #t~ret10 := fibo1(~n - 2);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume !(~n < 1); 247#L12 assume !(1 == ~n); 200#L15 call #t~ret7 := fibo2(~n - 1);< 239#fibo2ENTRY ~n := #in~n; 244#L20 assume !(~n < 1); 243#L22 assume !(1 == ~n); 224#L25 call #t~ret9 := fibo1(~n - 1);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume ~n < 1;#res := 0; 225#fibo1FINAL assume true; 229#fibo1EXIT >#48#return; 221#L25-1 [2020-11-28 03:20:45,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:45,863 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-11-28 03:20:45,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:45,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772659502] [2020-11-28 03:20:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:45,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:20:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:20:46,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772659502] [2020-11-28 03:20:46,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:46,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:20:46,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973089555] [2020-11-28 03:20:46,038 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:20:46,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:46,041 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-11-28 03:20:46,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:46,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350577868] [2020-11-28 03:20:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:20:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:20:46,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350577868] [2020-11-28 03:20:46,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:20:46,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:20:46,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339183729] [2020-11-28 03:20:46,141 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:20:46,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:46,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:20:46,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:20:46,151 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-11-28 03:20:46,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:46,271 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-11-28 03:20:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:20:46,272 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-11-28 03:20:46,277 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:20:46,285 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-11-28 03:20:46,288 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-11-28 03:20:46,289 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-11-28 03:20:46,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-11-28 03:20:46,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:46,291 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-11-28 03:20:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-11-28 03:20:46,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-28 03:20:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 03:20:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-11-28 03:20:46,320 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-28 03:20:46,321 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-28 03:20:46,321 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 03:20:46,321 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-11-28 03:20:46,323 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:20:46,326 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:20:46,327 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:20:46,328 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:46,329 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:46,329 INFO L794 eck$LassoCheckResult]: Stem: 375#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 374#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 355#L39 call main_#t~ret11 := fibo1(main_~x~0);< 364#fibo1ENTRY ~n := #in~n; 354#L10 assume !(~n < 1); 356#L12 assume !(1 == ~n); 346#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 399#L20 assume !(~n < 1); 400#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 371#fibo1ENTRY ~n := #in~n; 351#L10 assume !(~n < 1); 353#L12 assume 1 == ~n;#res := 1; 372#fibo1FINAL assume true; 365#fibo1EXIT >#48#return; 366#L25-1 [2020-11-28 03:20:46,330 INFO L796 eck$LassoCheckResult]: Loop: 366#L25-1 call #t~ret10 := fibo1(~n - 2);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume !(1 == ~n); 344#L15 call #t~ret7 := fibo2(~n - 1);< 388#fibo2ENTRY ~n := #in~n; 395#L20 assume !(~n < 1); 393#L22 assume !(1 == ~n); 368#L25 call #t~ret9 := fibo1(~n - 1);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume 1 == ~n;#res := 1; 369#fibo1FINAL assume true; 373#fibo1EXIT >#48#return; 366#L25-1 [2020-11-28 03:20:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:46,330 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-11-28 03:20:46,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:46,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576745143] [2020-11-28 03:20:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:20:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:46,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576745143] [2020-11-28 03:20:46,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330141426] [2020-11-28 03:20:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:46,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:20:46,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:46,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:46,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-28 03:20:46,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743579405] [2020-11-28 03:20:46,584 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:20:46,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:46,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-11-28 03:20:46,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:46,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263093330] [2020-11-28 03:20:46,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:46,593 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:46,611 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:46,623 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:46,895 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:20:46,895 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:20:46,895 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:20:46,896 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:20:46,896 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:20:46,896 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:46,896 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:20:46,896 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:20:46,896 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration3_Loop [2020-11-28 03:20:46,896 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:20:46,896 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:20:46,898 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:46,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:46,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:46,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:46,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:46,923 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:46,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:46,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:46,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:47,035 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:20:47,035 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:47,090 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:47,090 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:47,094 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:47,094 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:47,123 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:47,124 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:47,127 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:47,127 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:47,150 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:47,150 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:47,155 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:47,155 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:47,195 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:47,195 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:47,200 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:47,200 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:47,243 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:47,243 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:47,282 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:20:47,282 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:47,903 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:20:47,905 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:20:47,905 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:20:47,905 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:20:47,905 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:20:47,905 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:20:47,906 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:47,906 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:20:47,906 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:20:47,906 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration3_Loop [2020-11-28 03:20:47,906 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:20:47,906 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:20:47,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:47,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:47,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:47,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:47,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:47,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:47,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:47,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:47,960 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:48,079 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:20:48,079 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:48,089 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:48,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:48,091 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:48,092 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:48,092 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:48,092 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:48,093 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:48,093 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:48,095 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:48,132 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:48,133 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:48,134 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:48,134 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:48,134 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:48,134 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:48,135 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:48,135 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:48,137 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:48,168 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:48,169 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:48,169 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:48,170 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:48,170 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:48,170 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:48,170 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:48,170 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:48,172 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:48,195 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:48,196 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:48,196 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:48,197 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:48,197 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:48,197 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:48,198 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:48,198 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:48,201 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:20:48,207 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:20:48,207 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:48,209 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:20:48,209 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:20:48,209 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:20:48,209 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2020-11-28 03:20:48,229 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:20:48,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:48,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:20:48,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:20:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:48,483 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:20:48,483 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-11-28 03:20:49,163 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 10 states. Result 191 states and 263 transitions. Complement of second has 40 states. [2020-11-28 03:20:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:20:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:20:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-11-28 03:20:49,167 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-11-28 03:20:49,168 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:49,168 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-11-28 03:20:49,169 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:49,169 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-11-28 03:20:49,170 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:49,170 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-11-28 03:20:49,189 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:20:49,201 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-11-28 03:20:49,204 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-11-28 03:20:49,207 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-11-28 03:20:49,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-11-28 03:20:49,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:49,208 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-11-28 03:20:49,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-11-28 03:20:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-11-28 03:20:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 03:20:49,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-11-28 03:20:49,244 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-11-28 03:20:49,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:49,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:20:49,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:20:49,247 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-11-28 03:20:49,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:49,487 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-11-28 03:20:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:20:49,490 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-11-28 03:20:49,496 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:20:49,509 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-11-28 03:20:49,509 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-11-28 03:20:49,510 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-11-28 03:20:49,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-11-28 03:20:49,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:49,511 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-11-28 03:20:49,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-11-28 03:20:49,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-11-28 03:20:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-11-28 03:20:49,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-11-28 03:20:49,541 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-28 03:20:49,541 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-28 03:20:49,541 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 03:20:49,541 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-11-28 03:20:49,547 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:20:49,547 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:20:49,547 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:20:49,554 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-28 03:20:49,555 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 03:20:49,555 INFO L794 eck$LassoCheckResult]: Stem: 1219#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1214#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 1192#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1193#fibo1ENTRY ~n := #in~n; 1257#L10 assume !(~n < 1); 1206#L12 assume !(1 == ~n); 1159#L15 call #t~ret7 := fibo2(~n - 1);< 1216#fibo2ENTRY ~n := #in~n; 1221#L20 assume !(~n < 1); 1175#L22 assume !(1 == ~n); 1176#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume !(~n < 1); 1262#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume ~n < 1;#res := 0; 1260#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1204#L15-1 call #t~ret8 := fibo2(~n - 2);< 1223#fibo2ENTRY ~n := #in~n; 1317#L20 assume !(~n < 1); 1316#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1256#L10 assume !(~n < 1); 1263#L12 assume 1 == ~n;#res := 1; 1264#fibo1FINAL assume true; 1251#fibo1EXIT >#48#return; 1208#L25-1 call #t~ret10 := fibo1(~n - 2);< 1213#fibo1ENTRY ~n := #in~n; 1249#L10 assume !(~n < 1); 1247#L12 assume !(1 == ~n); 1212#L15 call #t~ret7 := fibo2(~n - 1);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume ~n < 1;#res := 0; 1244#fibo2FINAL assume true; 1248#fibo2EXIT >#52#return; 1211#L15-1 call #t~ret8 := fibo2(~n - 2);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume !(~n < 1); 1239#L22 assume 1 == ~n;#res := 1; 1240#fibo2FINAL assume true; 1308#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-28 03:20:49,556 INFO L796 eck$LassoCheckResult]: Loop: 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-28 03:20:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-11-28 03:20:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:49,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874478786] [2020-11-28 03:20:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:20:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:20:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:20:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:20:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-28 03:20:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:20:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-28 03:20:49,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874478786] [2020-11-28 03:20:49,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194216694] [2020-11-28 03:20:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:20:50,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 30 proven. 79 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-11-28 03:20:50,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:50,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2020-11-28 03:20:50,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912912497] [2020-11-28 03:20:50,335 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:20:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:50,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-11-28 03:20:50,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:50,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588563447] [2020-11-28 03:20:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:20:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:20:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-28 03:20:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:20:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-11-28 03:20:50,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588563447] [2020-11-28 03:20:50,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094766587] [2020-11-28 03:20:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:20:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 03:20:50,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:50,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-11-28 03:20:50,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966337526] [2020-11-28 03:20:50,761 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:20:50,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:50,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:20:50,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:20:50,765 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-11-28 03:20:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:51,168 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-11-28 03:20:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:20:51,169 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-11-28 03:20:51,174 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:20:51,180 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-11-28 03:20:51,181 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-11-28 03:20:51,181 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-11-28 03:20:51,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-11-28 03:20:51,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:51,183 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-11-28 03:20:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-11-28 03:20:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-11-28 03:20:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-28 03:20:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-11-28 03:20:51,202 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-28 03:20:51,202 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-28 03:20:51,202 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-28 03:20:51,203 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-11-28 03:20:51,205 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:20:51,205 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:20:51,205 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:20:51,207 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:51,207 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:51,207 INFO L794 eck$LassoCheckResult]: Stem: 2331#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2321#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 2303#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2304#fibo1ENTRY ~n := #in~n; 2366#L10 assume !(~n < 1); 2320#L12 assume !(1 == ~n); 2284#L15 call #t~ret7 := fibo2(~n - 1);< 2324#fibo2ENTRY ~n := #in~n; 2415#L20 assume !(~n < 1); 2283#L22 assume !(1 == ~n); 2285#L25 call #t~ret9 := fibo1(~n - 1);< 2313#fibo1ENTRY ~n := #in~n; 2352#L10 assume !(~n < 1); 2350#L12 assume !(1 == ~n); 2267#L15 call #t~ret7 := fibo2(~n - 1);< 2346#fibo2ENTRY ~n := #in~n; 2369#L20 assume !(~n < 1); 2368#L22 assume !(1 == ~n); 2338#L25 call #t~ret9 := fibo1(~n - 1);< 2313#fibo1ENTRY ~n := #in~n; 2355#L10 assume !(~n < 1); 2379#L12 assume 1 == ~n;#res := 1; 2380#fibo1FINAL assume true; 2446#fibo1EXIT >#48#return; 2293#L25-1 call #t~ret10 := fibo1(~n - 2);< 2316#fibo1ENTRY ~n := #in~n; 2292#L10 assume ~n < 1;#res := 0; 2294#fibo1FINAL assume true; 2449#fibo1EXIT >#50#return; 2266#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2269#fibo2FINAL assume true; 2389#fibo2EXIT >#52#return; 2288#L15-1 [2020-11-28 03:20:51,208 INFO L796 eck$LassoCheckResult]: Loop: 2288#L15-1 call #t~ret8 := fibo2(~n - 2);< 2337#fibo2ENTRY ~n := #in~n; 2416#L20 assume !(~n < 1); 2417#L22 assume !(1 == ~n); 2396#L25 call #t~ret9 := fibo1(~n - 1);< 2405#fibo1ENTRY ~n := #in~n; 2410#L10 assume !(~n < 1); 2408#L12 assume !(1 == ~n); 2289#L15 call #t~ret7 := fibo2(~n - 1);< 2337#fibo2ENTRY ~n := #in~n; 2416#L20 assume !(~n < 1); 2417#L22 assume 1 == ~n;#res := 1; 2286#fibo2FINAL assume true; 2290#fibo2EXIT >#52#return; 2288#L15-1 [2020-11-28 03:20:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:51,208 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-11-28 03:20:51,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:51,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970518129] [2020-11-28 03:20:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:51,220 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:51,230 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:51,236 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-11-28 03:20:51,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:51,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732182155] [2020-11-28 03:20:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:51,242 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:51,246 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:51,248 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:51,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1977386679, now seen corresponding path program 1 times [2020-11-28 03:20:51,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:51,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064073153] [2020-11-28 03:20:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:51,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:20:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:51,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:20:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:51,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-28 03:20:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-28 03:20:51,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064073153] [2020-11-28 03:20:51,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231061426] [2020-11-28 03:20:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:51,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:20:51,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 03:20:51,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:51,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2020-11-28 03:20:51,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659165824] [2020-11-28 03:20:51,750 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:20:51,750 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:20:51,751 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:20:51,751 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:20:51,751 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:20:51,751 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:51,751 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:20:51,751 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:20:51,751 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration5_Loop [2020-11-28 03:20:51,751 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:20:51,751 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:20:51,752 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:51,757 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:51,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:51,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:51,778 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:51,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:51,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:51,795 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:51,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:51,874 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:20:51,874 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:51,878 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:51,878 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:51,882 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:51,882 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:51,909 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:51,909 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:51,913 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:51,913 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:51,939 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:51,939 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:51,942 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:51,942 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=1} Honda state: {fibo1_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:51,969 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:51,969 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:51,976 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:51,976 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:52,008 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:52,008 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:52,010 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:52,011 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:52,035 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:52,035 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:52,064 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:20:52,064 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:52,867 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:20:52,869 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:20:52,869 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:20:52,869 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:20:52,869 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:20:52,869 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:20:52,869 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:52,870 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:20:52,870 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:20:52,870 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration5_Loop [2020-11-28 03:20:52,870 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:20:52,870 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:20:52,871 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:52,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:52,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:52,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:52,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:52,901 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:52,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:52,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:52,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:53,012 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:20:53,013 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:53,019 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:53,022 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:53,022 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:53,022 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:53,022 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:53,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:53,023 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:53,024 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:53,026 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:53,076 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:53,078 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:53,078 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:53,078 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:53,078 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:53,078 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:53,079 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:53,079 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:53,080 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:53,107 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:53,108 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:53,109 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:53,109 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:53,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:53,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:53,110 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:53,110 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:53,111 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:53,139 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:53,140 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:53,140 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:53,140 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:53,141 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:53,141 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:53,141 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:53,141 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:53,143 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:53,169 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:53,170 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:53,171 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:53,171 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:53,171 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:53,171 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:53,171 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:53,172 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:53,174 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:53,200 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:53,202 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:53,202 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:53,202 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:53,203 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:53,203 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:53,203 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:53,203 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:53,205 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:53,232 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:53,233 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:53,233 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:53,234 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:53,234 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:53,234 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:53,234 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:53,234 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:53,236 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:53,263 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:53,266 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:53,266 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:53,266 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:53,266 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:53,267 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:53,269 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:53,269 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:53,281 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:20:53,285 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:20:53,285 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:53,288 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:20:53,288 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:20:53,288 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:20:53,288 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-11-28 03:20:53,313 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:20:53,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:53,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:20:53,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:53,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:20:53,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:20:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:53,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:20:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:53,708 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:20:53,708 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 10 states. [2020-11-28 03:20:54,422 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59. Second operand 10 states. Result 717 states and 936 transitions. Complement of second has 40 states. [2020-11-28 03:20:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:20:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:20:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 69 transitions. [2020-11-28 03:20:54,427 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 14 letters. [2020-11-28 03:20:54,428 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:54,428 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-28 03:20:54,429 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:54,430 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 28 letters. [2020-11-28 03:20:54,431 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:54,432 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 717 states and 936 transitions. [2020-11-28 03:20:54,454 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-11-28 03:20:54,474 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 717 states to 646 states and 859 transitions. [2020-11-28 03:20:54,475 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 301 [2020-11-28 03:20:54,477 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 308 [2020-11-28 03:20:54,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 646 states and 859 transitions. [2020-11-28 03:20:54,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:54,478 INFO L691 BuchiCegarLoop]: Abstraction has 646 states and 859 transitions. [2020-11-28 03:20:54,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states and 859 transitions. [2020-11-28 03:20:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 625. [2020-11-28 03:20:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-11-28 03:20:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 829 transitions. [2020-11-28 03:20:54,560 INFO L714 BuchiCegarLoop]: Abstraction has 625 states and 829 transitions. [2020-11-28 03:20:54,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:54,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:20:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:20:54,562 INFO L87 Difference]: Start difference. First operand 625 states and 829 transitions. Second operand 14 states. [2020-11-28 03:20:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:54,944 INFO L93 Difference]: Finished difference Result 234 states and 284 transitions. [2020-11-28 03:20:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:20:54,947 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 234 states and 284 transitions. [2020-11-28 03:20:54,952 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2020-11-28 03:20:54,959 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 234 states to 219 states and 269 transitions. [2020-11-28 03:20:54,959 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2020-11-28 03:20:54,960 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 155 [2020-11-28 03:20:54,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 219 states and 269 transitions. [2020-11-28 03:20:54,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:54,966 INFO L691 BuchiCegarLoop]: Abstraction has 219 states and 269 transitions. [2020-11-28 03:20:54,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states and 269 transitions. [2020-11-28 03:20:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 199. [2020-11-28 03:20:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-11-28 03:20:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 245 transitions. [2020-11-28 03:20:54,985 INFO L714 BuchiCegarLoop]: Abstraction has 199 states and 245 transitions. [2020-11-28 03:20:54,986 INFO L594 BuchiCegarLoop]: Abstraction has 199 states and 245 transitions. [2020-11-28 03:20:54,986 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-28 03:20:54,986 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 199 states and 245 transitions. [2020-11-28 03:20:54,988 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2020-11-28 03:20:54,989 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:20:54,989 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:20:54,993 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:54,994 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:54,997 INFO L794 eck$LassoCheckResult]: Stem: 4497#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4496#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 4466#L39 call main_#t~ret11 := fibo1(main_~x~0);< 4467#fibo1ENTRY ~n := #in~n; 4550#L10 assume !(~n < 1); 4488#L12 assume !(1 == ~n); 4483#L15 call #t~ret7 := fibo2(~n - 1);< 4567#fibo2ENTRY ~n := #in~n; 4512#L20 assume !(~n < 1); 4513#L22 assume !(1 == ~n); 4454#L25 call #t~ret9 := fibo1(~n - 1);< 4484#fibo1ENTRY ~n := #in~n; 4499#L10 assume !(~n < 1); 4556#L12 assume !(1 == ~n); 4547#L15 call #t~ret7 := fibo2(~n - 1);< 4548#fibo2ENTRY ~n := #in~n; 4555#L20 assume !(~n < 1); 4554#L22 assume 1 == ~n;#res := 1; 4553#fibo2FINAL assume true; 4546#fibo2EXIT >#52#return; 4544#L15-1 call #t~ret8 := fibo2(~n - 2);< 4545#fibo2ENTRY ~n := #in~n; 4551#L20 assume ~n < 1;#res := 0; 4549#fibo2FINAL assume true; 4543#fibo2EXIT >#54#return; 4542#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 4541#fibo1FINAL assume true; 4538#fibo1EXIT >#48#return; 4526#L25-1 call #t~ret10 := fibo1(~n - 2);< 4495#fibo1ENTRY ~n := #in~n; 4531#L10 assume !(~n < 1); 4529#L12 assume !(1 == ~n); 4494#L15 call #t~ret7 := fibo2(~n - 1);< 4522#fibo2ENTRY ~n := #in~n; 4520#L20 assume !(~n < 1); 4518#L22 assume !(1 == ~n); 4476#L25 call #t~ret9 := fibo1(~n - 1);< 4613#fibo1ENTRY ~n := #in~n; 4635#L10 assume !(~n < 1); 4558#L12 assume !(1 == ~n); 4442#L15 call #t~ret7 := fibo2(~n - 1);< 4500#fibo2ENTRY [2020-11-28 03:20:54,997 INFO L796 eck$LassoCheckResult]: Loop: 4500#fibo2ENTRY ~n := #in~n; 4598#L20 assume !(~n < 1); 4560#L22 assume !(1 == ~n); 4469#L25 call #t~ret9 := fibo1(~n - 1);< 4482#fibo1ENTRY ~n := #in~n; 4638#L10 assume !(~n < 1); 4633#L12 assume !(1 == ~n); 4443#L15 call #t~ret7 := fibo2(~n - 1);< 4500#fibo2ENTRY [2020-11-28 03:20:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:54,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1779459932, now seen corresponding path program 1 times [2020-11-28 03:20:55,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:55,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439771468] [2020-11-28 03:20:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:55,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:20:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:55,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:55,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:20:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:20:55,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439771468] [2020-11-28 03:20:55,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16257030] [2020-11-28 03:20:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:20:55,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 03:20:55,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:55,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-28 03:20:55,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782197254] [2020-11-28 03:20:55,299 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:20:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:55,299 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-11-28 03:20:55,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:55,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251335220] [2020-11-28 03:20:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:55,303 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:55,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:55,307 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:55,437 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:20:55,437 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:20:55,437 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:20:55,437 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:20:55,437 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:20:55,437 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,437 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:20:55,437 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:20:55,438 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration6_Loop [2020-11-28 03:20:55,438 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:20:55,438 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:20:55,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,458 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,469 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,482 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:55,668 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:20:55,668 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:55,679 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:55,679 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,683 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:55,683 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:55,721 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:55,723 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:55,723 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,752 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:55,752 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:55,755 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:55,755 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,784 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:55,784 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:55,787 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:55,787 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,817 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:55,817 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:55,819 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:55,820 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,848 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:55,848 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:55,851 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:55,851 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,880 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:55,880 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:55,904 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:55,905 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,937 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:55,937 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:55,940 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:20:55,940 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,968 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:20:55,968 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:55,998 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:20:55,999 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:20:56,070 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:20:56,072 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:20:56,072 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:20:56,072 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:20:56,072 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:20:56,072 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:20:56,072 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,072 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:20:56,072 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:20:56,072 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration6_Loop [2020-11-28 03:20:56,073 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:20:56,073 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:20:56,074 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,077 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,091 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,098 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,101 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:20:56,172 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:20:56,173 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,181 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,183 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,183 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,183 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,183 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,183 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,184 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:56,184 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,185 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,213 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,215 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,215 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,215 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,215 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,216 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,216 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:56,216 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,229 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,258 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,259 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,259 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,260 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,260 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,260 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,261 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:56,261 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,274 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,307 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,309 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,309 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,309 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,309 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,309 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,310 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:56,310 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,311 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,341 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,342 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,342 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,343 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,343 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,343 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:56,343 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,345 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,375 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,376 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,376 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,377 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,377 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,377 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,379 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:56,379 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,381 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,420 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,422 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,422 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,422 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,422 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,422 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,423 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:56,423 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,425 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,449 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,450 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,450 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,451 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,451 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,451 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,451 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:56,451 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,452 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,479 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,480 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,480 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,481 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,481 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,481 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,481 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:20:56,481 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,483 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:56,508 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:20:56,510 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:20:56,510 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:20:56,510 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:20:56,510 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:20:56,511 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:20:56,512 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,512 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:20:56,514 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:20:56,528 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:20:56,529 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:20:56,532 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:20:56,532 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:20:56,532 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:20:56,532 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:20:56,569 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:20:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:56,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:20:56,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:56,681 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:20:56,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:20:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:56,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:20:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:56,769 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:20:56,770 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51 Second operand 7 states. [2020-11-28 03:20:56,965 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51. Second operand 7 states. Result 223 states and 270 transitions. Complement of second has 21 states. [2020-11-28 03:20:56,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:20:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:20:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2020-11-28 03:20:56,967 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 41 letters. Loop has 8 letters. [2020-11-28 03:20:56,967 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:56,967 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:20:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:57,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:20:57,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:57,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:20:57,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:20:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:57,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:20:57,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:57,252 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:20:57,252 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51 Second operand 7 states. [2020-11-28 03:20:57,442 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51. Second operand 7 states. Result 223 states and 270 transitions. Complement of second has 21 states. [2020-11-28 03:20:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:20:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:20:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 23 transitions. [2020-11-28 03:20:57,444 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 23 transitions. Stem has 41 letters. Loop has 8 letters. [2020-11-28 03:20:57,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:57,444 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:20:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:20:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:57,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:20:57,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:20:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:57,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:20:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:20:57,702 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 5 loop predicates [2020-11-28 03:20:57,702 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51 Second operand 7 states. [2020-11-28 03:20:57,956 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 199 states and 245 transitions. cyclomatic complexity: 51. Second operand 7 states. Result 401 states and 472 transitions. Complement of second has 25 states. [2020-11-28 03:20:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:20:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:20:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2020-11-28 03:20:57,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 41 letters. Loop has 8 letters. [2020-11-28 03:20:57,959 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:57,959 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 49 letters. Loop has 8 letters. [2020-11-28 03:20:57,960 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:57,960 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 41 letters. Loop has 16 letters. [2020-11-28 03:20:57,961 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:20:57,961 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 401 states and 472 transitions. [2020-11-28 03:20:57,966 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 34 [2020-11-28 03:20:57,970 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 401 states to 297 states and 362 transitions. [2020-11-28 03:20:57,971 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 171 [2020-11-28 03:20:57,971 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 185 [2020-11-28 03:20:57,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 297 states and 362 transitions. [2020-11-28 03:20:57,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:57,972 INFO L691 BuchiCegarLoop]: Abstraction has 297 states and 362 transitions. [2020-11-28 03:20:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states and 362 transitions. [2020-11-28 03:20:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 272. [2020-11-28 03:20:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-11-28 03:20:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 328 transitions. [2020-11-28 03:20:57,983 INFO L714 BuchiCegarLoop]: Abstraction has 272 states and 328 transitions. [2020-11-28 03:20:57,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:57,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 03:20:57,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:20:57,985 INFO L87 Difference]: Start difference. First operand 272 states and 328 transitions. Second operand 13 states. [2020-11-28 03:20:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:58,350 INFO L93 Difference]: Finished difference Result 304 states and 372 transitions. [2020-11-28 03:20:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:20:58,351 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 304 states and 372 transitions. [2020-11-28 03:20:58,355 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:20:58,362 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 304 states to 302 states and 370 transitions. [2020-11-28 03:20:58,362 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 192 [2020-11-28 03:20:58,363 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 192 [2020-11-28 03:20:58,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 302 states and 370 transitions. [2020-11-28 03:20:58,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:58,368 INFO L691 BuchiCegarLoop]: Abstraction has 302 states and 370 transitions. [2020-11-28 03:20:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states and 370 transitions. [2020-11-28 03:20:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 277. [2020-11-28 03:20:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-11-28 03:20:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 336 transitions. [2020-11-28 03:20:58,381 INFO L714 BuchiCegarLoop]: Abstraction has 277 states and 336 transitions. [2020-11-28 03:20:58,381 INFO L594 BuchiCegarLoop]: Abstraction has 277 states and 336 transitions. [2020-11-28 03:20:58,381 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-28 03:20:58,382 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 277 states and 336 transitions. [2020-11-28 03:20:58,385 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:20:58,385 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:20:58,385 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:20:58,389 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:58,389 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:58,391 INFO L794 eck$LassoCheckResult]: Stem: 6854#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 6844#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 6824#L39 call main_#t~ret11 := fibo1(main_~x~0);< 6825#fibo1ENTRY ~n := #in~n; 6911#L10 assume !(~n < 1); 6910#L12 assume !(1 == ~n); 6906#L15 call #t~ret7 := fibo2(~n - 1);< 6909#fibo2ENTRY ~n := #in~n; 6908#L20 assume !(~n < 1); 6907#L22 assume !(1 == ~n); 6882#L25 call #t~ret9 := fibo1(~n - 1);< 6883#fibo1ENTRY ~n := #in~n; 6905#L10 assume !(~n < 1); 6902#L12 assume !(1 == ~n); 6878#L15 call #t~ret7 := fibo2(~n - 1);< 6891#fibo2ENTRY ~n := #in~n; 6892#L20 assume !(~n < 1); 7049#L22 assume !(1 == ~n); 7043#L25 call #t~ret9 := fibo1(~n - 1);< 7044#fibo1ENTRY ~n := #in~n; 7050#L10 assume !(~n < 1); 7048#L12 assume 1 == ~n;#res := 1; 7046#fibo1FINAL assume true; 7042#fibo1EXIT >#48#return; 7028#L25-1 call #t~ret10 := fibo1(~n - 2);< 7029#fibo1ENTRY ~n := #in~n; 7033#L10 assume ~n < 1;#res := 0; 7032#fibo1FINAL assume true; 7027#fibo1EXIT >#50#return; 7024#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 7019#fibo2FINAL assume true; 7015#fibo2EXIT >#52#return; 6972#L15-1 call #t~ret8 := fibo2(~n - 2);< 6973#fibo2ENTRY ~n := #in~n; 6981#L20 assume ~n < 1;#res := 0; 6980#fibo2FINAL assume true; 6971#fibo2EXIT >#54#return; 6969#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 6968#fibo1FINAL assume true; 6962#fibo1EXIT >#48#return; 6850#L25-1 call #t~ret10 := fibo1(~n - 2);< 6952#fibo1ENTRY [2020-11-28 03:20:58,392 INFO L796 eck$LassoCheckResult]: Loop: 6952#fibo1ENTRY ~n := #in~n; 6946#L10 assume !(~n < 1); 6948#L12 assume !(1 == ~n); 6848#L15 call #t~ret7 := fibo2(~n - 1);< 6852#fibo2ENTRY ~n := #in~n; 6974#L20 assume !(~n < 1); 6970#L22 assume !(1 == ~n); 6960#L25 call #t~ret9 := fibo1(~n - 1);< 6966#fibo1ENTRY ~n := #in~n; 6979#L10 assume !(~n < 1); 6978#L12 assume !(1 == ~n); 6965#L15 call #t~ret7 := fibo2(~n - 1);< 6975#fibo2ENTRY ~n := #in~n; 6976#L20 assume !(~n < 1); 7011#L22 assume !(1 == ~n); 7010#L25 call #t~ret9 := fibo1(~n - 1);< 7035#fibo1ENTRY ~n := #in~n; 7038#L10 assume !(~n < 1); 7037#L12 assume 1 == ~n;#res := 1; 7036#fibo1FINAL assume true; 7034#fibo1EXIT >#48#return; 7022#L25-1 call #t~ret10 := fibo1(~n - 2);< 7023#fibo1ENTRY ~n := #in~n; 7031#L10 assume ~n < 1;#res := 0; 7030#fibo1FINAL assume true; 7021#fibo1EXIT >#50#return; 7018#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 7014#fibo2FINAL assume true; 6991#fibo2EXIT >#52#return; 6987#L15-1 call #t~ret8 := fibo2(~n - 2);< 6989#fibo2ENTRY ~n := #in~n; 7001#L20 assume ~n < 1;#res := 0; 7000#fibo2FINAL assume true; 6985#fibo2EXIT >#54#return; 6983#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 6964#fibo1FINAL assume true; 6963#fibo1EXIT >#48#return; 6851#L25-1 call #t~ret10 := fibo1(~n - 2);< 6952#fibo1ENTRY [2020-11-28 03:20:58,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:58,393 INFO L82 PathProgramCache]: Analyzing trace with hash -205691575, now seen corresponding path program 1 times [2020-11-28 03:20:58,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:58,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580900643] [2020-11-28 03:20:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:20:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:20:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:20:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 03:20:58,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580900643] [2020-11-28 03:20:58,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911487705] [2020-11-28 03:20:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:20:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:20:58,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:58,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-11-28 03:20:58,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034778109] [2020-11-28 03:20:58,810 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:20:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:58,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1309552832, now seen corresponding path program 1 times [2020-11-28 03:20:58,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:58,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082459833] [2020-11-28 03:20:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:20:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:20:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:20:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 03:20:58,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082459833] [2020-11-28 03:20:58,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009894180] [2020-11-28 03:20:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:20:58,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 03:20:59,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:59,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-11-28 03:20:59,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785569886] [2020-11-28 03:20:59,112 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:20:59,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:20:59,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:20:59,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:20:59,113 INFO L87 Difference]: Start difference. First operand 277 states and 336 transitions. cyclomatic complexity: 64 Second operand 11 states. [2020-11-28 03:20:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:20:59,380 INFO L93 Difference]: Finished difference Result 321 states and 393 transitions. [2020-11-28 03:20:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:20:59,382 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 321 states and 393 transitions. [2020-11-28 03:20:59,387 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:20:59,392 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 321 states to 319 states and 391 transitions. [2020-11-28 03:20:59,392 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 208 [2020-11-28 03:20:59,393 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2020-11-28 03:20:59,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 319 states and 391 transitions. [2020-11-28 03:20:59,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:20:59,393 INFO L691 BuchiCegarLoop]: Abstraction has 319 states and 391 transitions. [2020-11-28 03:20:59,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states and 391 transitions. [2020-11-28 03:20:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 287. [2020-11-28 03:20:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-11-28 03:20:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 351 transitions. [2020-11-28 03:20:59,409 INFO L714 BuchiCegarLoop]: Abstraction has 287 states and 351 transitions. [2020-11-28 03:20:59,410 INFO L594 BuchiCegarLoop]: Abstraction has 287 states and 351 transitions. [2020-11-28 03:20:59,410 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-28 03:20:59,410 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 287 states and 351 transitions. [2020-11-28 03:20:59,412 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:20:59,413 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:20:59,413 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:20:59,418 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:59,418 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:20:59,418 INFO L794 eck$LassoCheckResult]: Stem: 7838#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(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7833#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 5; 7813#L39 call main_#t~ret11 := fibo1(main_~x~0);< 7814#fibo1ENTRY ~n := #in~n; 7880#L10 assume !(~n < 1); 7879#L12 assume !(1 == ~n); 7875#L15 call #t~ret7 := fibo2(~n - 1);< 7878#fibo2ENTRY ~n := #in~n; 7877#L20 assume !(~n < 1); 7876#L22 assume !(1 == ~n); 7865#L25 call #t~ret9 := fibo1(~n - 1);< 7867#fibo1ENTRY ~n := #in~n; 7873#L10 assume !(~n < 1); 7872#L12 assume !(1 == ~n); 7862#L15 call #t~ret7 := fibo2(~n - 1);< 7870#fibo2ENTRY ~n := #in~n; 7871#L20 assume !(~n < 1); 7993#L22 assume !(1 == ~n); 7991#L25 call #t~ret9 := fibo1(~n - 1);< 7992#fibo1ENTRY ~n := #in~n; 8004#L10 assume !(~n < 1); 7999#L12 assume 1 == ~n;#res := 1; 7994#fibo1FINAL assume true; 7990#fibo1EXIT >#48#return; 7982#L25-1 call #t~ret10 := fibo1(~n - 2);< 7983#fibo1ENTRY ~n := #in~n; 7989#L10 assume ~n < 1;#res := 0; 7988#fibo1FINAL assume true; 7981#fibo1EXIT >#50#return; 7979#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 7978#fibo2FINAL assume true; 7977#fibo2EXIT >#52#return; 7974#L15-1 call #t~ret8 := fibo2(~n - 2);< 7975#fibo2ENTRY ~n := #in~n; 8009#L20 assume !(~n < 1); 8008#L22 assume 1 == ~n;#res := 1; 8007#fibo2FINAL assume true; 7973#fibo2EXIT >#54#return; 7959#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 7956#fibo1FINAL assume true; 7954#fibo1EXIT >#48#return; 7935#L25-1 call #t~ret10 := fibo1(~n - 2);< 7942#fibo1ENTRY [2020-11-28 03:20:59,419 INFO L796 eck$LassoCheckResult]: Loop: 7942#fibo1ENTRY ~n := #in~n; 7943#L10 assume !(~n < 1); 7934#L12 assume !(1 == ~n); 7795#L15 call #t~ret7 := fibo2(~n - 1);< 7932#fibo2ENTRY ~n := #in~n; 7843#L20 assume !(~n < 1); 7794#L22 assume !(1 == ~n); 7797#L25 call #t~ret9 := fibo1(~n - 1);< 7958#fibo1ENTRY ~n := #in~n; 7976#L10 assume !(~n < 1); 7972#L12 assume !(1 == ~n); 7796#L15 call #t~ret7 := fibo2(~n - 1);< 7841#fibo2ENTRY ~n := #in~n; 7842#L20 assume !(~n < 1); 8002#L22 assume 1 == ~n;#res := 1; 7998#fibo2FINAL assume true; 7986#fibo2EXIT >#52#return; 7964#L15-1 call #t~ret8 := fibo2(~n - 2);< 7966#fibo2ENTRY ~n := #in~n; 7995#L20 assume ~n < 1;#res := 0; 7996#fibo2FINAL assume true; 8044#fibo2EXIT >#54#return; 7965#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 8043#fibo1FINAL assume true; 7952#fibo1EXIT >#48#return; 7936#L25-1 call #t~ret10 := fibo1(~n - 2);< 7942#fibo1ENTRY [2020-11-28 03:20:59,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:59,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1129557662, now seen corresponding path program 1 times [2020-11-28 03:20:59,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:59,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9400912] [2020-11-28 03:20:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:59,449 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:59,462 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:59,470 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:59,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1552659165, now seen corresponding path program 1 times [2020-11-28 03:20:59,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:59,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279033875] [2020-11-28 03:20:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:59,480 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:20:59,485 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:20:59,487 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:20:59,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:20:59,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1204019970, now seen corresponding path program 1 times [2020-11-28 03:20:59,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:20:59,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283724754] [2020-11-28 03:20:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:20:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:20:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:59,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:20:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:20:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-11-28 03:20:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:20:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:20:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-28 03:20:59,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283724754] [2020-11-28 03:20:59,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834991972] [2020-11-28 03:20:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:20:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:20:59,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:20:59,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:20:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 41 proven. 34 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-11-28 03:20:59,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:20:59,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2020-11-28 03:20:59,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416839814] [2020-11-28 03:21:00,250 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:21:00,250 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:21:00,250 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:21:00,250 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:21:00,250 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:21:00,250 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,251 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:21:00,251 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:21:00,251 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration8_Loop [2020-11-28 03:21:00,251 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:21:00,251 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:21:00,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,259 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,341 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:21:00,341 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,344 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:21:00,344 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:21:00,346 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:21:00,347 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,370 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:21:00,370 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:21:00,372 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:21:00,372 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,396 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:21:00,396 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:21:00,398 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:21:00,398 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:21:00,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:21:00,440 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,444 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:21:00,444 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,470 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:21:00,470 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:21:00,472 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:21:00,472 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,495 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:21:00,495 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:21:00,498 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:21:00,498 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,521 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:21:00,522 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:21:00,524 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:21:00,524 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,547 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:21:00,548 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:21:00,550 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:21:00,550 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,573 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:21:00,573 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,600 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:21:00,600 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:21:00,605 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:21:00,638 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:21:00,638 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:21:00,638 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:21:00,638 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:21:00,638 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:21:00,638 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,638 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:21:00,639 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:21:00,639 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_5-2.c_Iteration8_Loop [2020-11-28 03:21:00,639 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:21:00,639 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:21:00,640 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:21:00,739 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:21:00,740 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,742 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:21:00,744 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:21:00,744 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:21:00,744 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:21:00,745 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:21:00,745 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:21:00,745 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:21:00,745 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:21:00,747 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,771 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:21:00,772 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:21:00,773 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:21:00,773 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:21:00,773 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:21:00,773 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:21:00,774 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:21:00,774 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:21:00,776 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:21:00,830 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:21:00,832 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:21:00,832 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:21:00,832 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:21:00,833 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:21:00,833 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:21:00,833 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:21:00,834 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,836 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:21:00,878 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:21:00,880 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:21:00,880 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:21:00,880 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:21:00,880 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:21:00,880 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:21:00,882 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:21:00,882 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,884 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,918 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:21:00,919 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:21:00,919 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:21:00,919 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:21:00,919 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:21:00,919 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:21:00,920 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:21:00,920 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:21:00,921 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,946 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:21:00,948 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:21:00,948 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:21:00,948 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:21:00,948 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:21:00,948 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:21:00,949 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:21:00,949 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:21:00,951 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:00,977 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:21:00,978 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:21:00,978 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:21:00,978 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:21:00,978 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:21:00,978 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:21:00,979 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:21:00,979 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:21:00,980 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:01,004 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:21:01,005 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:21:01,005 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:21:01,005 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:21:01,005 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:21:01,005 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:21:01,006 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:21:01,006 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:21:01,007 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:01,031 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:21:01,032 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:21:01,032 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:21:01,032 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:21:01,032 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:21:01,033 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:21:01,034 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:21:01,034 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:21:01,048 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:21:01,052 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:21:01,052 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4155a34f-8ed8-4288-ae88-002846433f5e/bin/uautomizer/z3 Starting monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:21:01,056 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:21:01,056 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:21:01,056 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:21:01,056 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:21:01,095 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:21:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:01,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:21:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:01,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:01,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:01,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:01,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:01,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:21:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:21:01,467 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-28 03:21:01,467 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69 Second operand 12 states. [2020-11-28 03:21:01,803 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69. Second operand 12 states. Result 494 states and 593 transitions. Complement of second has 16 states. [2020-11-28 03:21:01,804 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 [2020-11-28 03:21:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 03:21:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 42 transitions. [2020-11-28 03:21:01,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 42 transitions. Stem has 42 letters. Loop has 26 letters. [2020-11-28 03:21:01,807 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:21:01,807 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:21:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:21:01,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:01,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:01,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:01,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:01,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:01,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:21:01,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:21:02,118 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-28 03:21:02,118 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69 Second operand 12 states. [2020-11-28 03:21:02,633 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69. Second operand 12 states. Result 670 states and 816 transitions. Complement of second has 41 states. [2020-11-28 03:21:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-28 03:21:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 03:21:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 58 transitions. [2020-11-28 03:21:02,659 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 42 letters. Loop has 26 letters. [2020-11-28 03:21:02,659 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:21:02,659 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:21:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:02,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:21:02,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:02,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:02,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:02,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:02,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:02,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:21:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:21:03,005 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 10 loop predicates [2020-11-28 03:21:03,005 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69 Second operand 12 states. [2020-11-28 03:21:03,361 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69. Second operand 12 states. Result 542 states and 647 transitions. Complement of second has 15 states. [2020-11-28 03:21:03,362 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 [2020-11-28 03:21:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 03:21:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 46 transitions. [2020-11-28 03:21:03,363 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 46 transitions. Stem has 42 letters. Loop has 26 letters. [2020-11-28 03:21:03,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:21:03,364 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:21:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:21:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:03,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-28 03:21:03,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:03,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:03,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:03,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:03,488 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:21:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:21:03,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-28 03:21:03,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:21:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:21:03,690 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-28 03:21:03,690 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69 Second operand 12 states. [2020-11-28 03:21:04,186 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 287 states and 351 transitions. cyclomatic complexity: 69. Second operand 12 states. Result 752 states and 919 transitions. Complement of second has 45 states. [2020-11-28 03:21:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-28 03:21:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 03:21:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 62 transitions. [2020-11-28 03:21:04,189 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 62 transitions. Stem has 42 letters. Loop has 26 letters. [2020-11-28 03:21:04,190 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:21:04,190 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 62 transitions. Stem has 68 letters. Loop has 26 letters. [2020-11-28 03:21:04,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:21:04,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 62 transitions. Stem has 42 letters. Loop has 52 letters. [2020-11-28 03:21:04,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:21:04,192 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 752 states and 919 transitions. [2020-11-28 03:21:04,200 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 46 [2020-11-28 03:21:04,206 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 752 states to 483 states and 610 transitions. [2020-11-28 03:21:04,206 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 205 [2020-11-28 03:21:04,207 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 262 [2020-11-28 03:21:04,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 483 states and 610 transitions. [2020-11-28 03:21:04,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:21:04,208 INFO L691 BuchiCegarLoop]: Abstraction has 483 states and 610 transitions. [2020-11-28 03:21:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states and 610 transitions. [2020-11-28 03:21:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 397. [2020-11-28 03:21:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-11-28 03:21:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 484 transitions. [2020-11-28 03:21:04,222 INFO L714 BuchiCegarLoop]: Abstraction has 397 states and 484 transitions. [2020-11-28 03:21:04,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:21:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:21:04,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:21:04,223 INFO L87 Difference]: Start difference. First operand 397 states and 484 transitions. Second operand 14 states. [2020-11-28 03:21:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:21:04,482 INFO L93 Difference]: Finished difference Result 180 states and 204 transitions. [2020-11-28 03:21:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 03:21:04,487 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 180 states and 204 transitions. [2020-11-28 03:21:04,489 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:21:04,489 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 180 states to 0 states and 0 transitions. [2020-11-28 03:21:04,489 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 03:21:04,489 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 03:21:04,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 03:21:04,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:21:04,490 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:21:04,490 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:21:04,490 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:21:04,490 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-28 03:21:04,490 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:21:04,490 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:21:04,490 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-28 03:21:04,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:21:04 BoogieIcfgContainer [2020-11-28 03:21:04,496 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:21:04,496 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:21:04,496 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:21:04,496 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:21:04,497 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:20:43" (3/4) ... [2020-11-28 03:21:04,500 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 03:21:04,500 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:21:04,501 INFO L168 Benchmark]: Toolchain (without parser) took 22026.00 ms. Allocated memory was 88.1 MB in the beginning and 226.5 MB in the end (delta: 138.4 MB). Free memory was 52.7 MB in the beginning and 129.3 MB in the end (delta: -76.6 MB). Peak memory consumption was 61.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:04,502 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 88.1 MB. Free memory is still 68.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:04,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.51 ms. Allocated memory is still 88.1 MB. Free memory was 52.5 MB in the beginning and 66.2 MB in the end (delta: -13.7 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:04,502 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.73 ms. Allocated memory is still 88.1 MB. Free memory was 66.2 MB in the beginning and 64.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:04,503 INFO L168 Benchmark]: Boogie Preprocessor took 19.54 ms. Allocated memory is still 88.1 MB. Free memory was 64.8 MB in the beginning and 64.0 MB in the end (delta: 845.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:04,503 INFO L168 Benchmark]: RCFGBuilder took 326.13 ms. Allocated memory is still 88.1 MB. Free memory was 63.8 MB in the beginning and 51.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:04,504 INFO L168 Benchmark]: BuchiAutomizer took 21386.84 ms. Allocated memory was 88.1 MB in the beginning and 226.5 MB in the end (delta: 138.4 MB). Free memory was 51.6 MB in the beginning and 130.4 MB in the end (delta: -78.8 MB). Peak memory consumption was 60.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:21:04,504 INFO L168 Benchmark]: Witness Printer took 4.19 ms. Allocated memory is still 226.5 MB. Free memory is still 129.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:21:04,506 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 88.1 MB. Free memory is still 68.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 237.51 ms. Allocated memory is still 88.1 MB. Free memory was 52.5 MB in the beginning and 66.2 MB in the end (delta: -13.7 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.73 ms. Allocated memory is still 88.1 MB. Free memory was 66.2 MB in the beginning and 64.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.54 ms. Allocated memory is still 88.1 MB. Free memory was 64.8 MB in the beginning and 64.0 MB in the end (delta: 845.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 326.13 ms. Allocated memory is still 88.1 MB. Free memory was 63.8 MB in the beginning and 51.6 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 21386.84 ms. Allocated memory was 88.1 MB in the beginning and 226.5 MB in the end (delta: 138.4 MB). Free memory was 51.6 MB in the beginning and 130.4 MB in the end (delta: -78.8 MB). Peak memory consumption was 60.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.19 ms. Allocated memory is still 226.5 MB. Free memory is still 129.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (7 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function \old(n) and consists of 11 locations. 7 modules have a trivial ranking function, the largest among these consists of 14 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.3s and 9 iterations. TraceHistogramMax:8. Analysis of lassos took 11.4s. Construction of modules took 2.6s. Büchi inclusion checks took 6.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 270 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 287 states and ocurred in iteration 7. Nontrivial modules had stage [3, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/19 HoareTripleCheckerStatistics: 373 SDtfs, 861 SDslu, 911 SDs, 0 SdLazy, 2367 SolverSat, 418 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI3 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf84 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq192 hnf91 smp84 dnf100 smp100 tf111 neg97 sie104 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 16ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 33 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...