./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10-1.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_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 faad93e560ba524ae1ece04545479d8bfc495d5f ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:20:14,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:20:14,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:20:14,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:20:14,892 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:20:14,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:20:14,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:20:14,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:20:14,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:20:14,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:20:14,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:20:14,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:20:14,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:20:14,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:20:14,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:20:14,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:20:14,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:20:14,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:20:14,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:20:14,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:20:14,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:20:14,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:20:14,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:20:14,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:20:14,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:20:14,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:20:14,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:20:14,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:20:14,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:20:14,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:20:14,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:20:14,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:20:14,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:20:14,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:20:14,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:20:14,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:20:14,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:20:14,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:20:14,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:20:14,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:20:14,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:20:14,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 21:20:14,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:20:14,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:20:14,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:20:14,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:20:14,965 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:20:14,966 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 21:20:14,966 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 21:20:14,966 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 21:20:14,966 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 21:20:14,966 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 21:20:14,967 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 21:20:14,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:20:14,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:20:14,967 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 21:20:14,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:20:14,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:20:14,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:20:14,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 21:20:14,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 21:20:14,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 21:20:14,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:20:14,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:20:14,969 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 21:20:14,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:20:14,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 21:20:14,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:20:14,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:20:14,970 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 21:20:14,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:20:14,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:20:14,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:20:14,971 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 21:20:14,972 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 21:20:14,972 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_c427802a-46cc-4efa-b22d-542f8b9297a9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faad93e560ba524ae1ece04545479d8bfc495d5f [2020-11-29 21:20:15,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:20:15,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:20:15,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:20:15,293 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:20:15,293 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:20:15,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2020-11-29 21:20:15,386 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/data/54a2a5b9d/c10d2964d2db4ae4827327115ef4216a/FLAG7433d5221 [2020-11-29 21:20:15,780 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:20:15,781 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2020-11-29 21:20:15,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/data/54a2a5b9d/c10d2964d2db4ae4827327115ef4216a/FLAG7433d5221 [2020-11-29 21:20:16,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/data/54a2a5b9d/c10d2964d2db4ae4827327115ef4216a [2020-11-29 21:20:16,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:20:16,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:20:16,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:20:16,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:20:16,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:20:16,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67921bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16, skipping insertion in model container [2020-11-29 21:20:16,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:20:16,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:20:16,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:20:16,396 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:20:16,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:20:16,441 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:20:16,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16 WrapperNode [2020-11-29 21:20:16,442 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:20:16,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:20:16,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:20:16,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:20:16,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:20:16,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:20:16,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:20:16,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:20:16,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... [2020-11-29 21:20:16,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:20:16,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:20:16,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:20:16,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:20:16,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:16,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:20:16,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:20:16,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:20:16,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:20:16,565 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-11-29 21:20:16,565 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-11-29 21:20:16,784 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:20:16,784 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 21:20:16,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:20:16 BoogieIcfgContainer [2020-11-29 21:20:16,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:20:16,787 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 21:20:16,787 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 21:20:16,790 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 21:20:16,791 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:20:16,791 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 09:20:16" (1/3) ... [2020-11-29 21:20:16,792 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@68ad3d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:20:16, skipping insertion in model container [2020-11-29 21:20:16,792 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:20:16,792 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:20:16" (2/3) ... [2020-11-29 21:20:16,802 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@68ad3d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:20:16, skipping insertion in model container [2020-11-29 21:20:16,802 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:20:16,803 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:20:16" (3/3) ... [2020-11-29 21:20:16,804 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2020-11-29 21:20:16,863 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 21:20:16,863 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 21:20:16,864 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 21:20:16,864 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:20:16,864 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:20:16,864 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 21:20:16,864 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:20:16,864 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 21:20:16,876 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-11-29 21:20:16,901 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 21:20:16,902 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:16,902 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:16,909 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 21:20:16,910 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 21:20:16,910 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 21:20:16,910 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-11-29 21:20:16,913 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 21:20:16,913 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:16,913 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:16,914 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 21:20:16,914 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 21:20:16,921 INFO L794 eck$LassoCheckResult]: Stem: 13#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-11-29 21:20:16,921 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-11-29 21:20:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-11-29 21:20:16,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:16,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778012324] [2020-11-29 21:20:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:17,072 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:17,101 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:17,120 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-11-29 21:20:17,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:17,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681442507] [2020-11-29 21:20:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:17,135 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:17,142 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:17,146 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:17,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:17,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-11-29 21:20:17,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:17,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694714385] [2020-11-29 21:20:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:17,178 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:17,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:17,227 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:17,380 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:17,380 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:17,381 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:17,381 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:17,381 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:20:17,381 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:17,381 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:17,382 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:17,382 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2020-11-29 21:20:17,382 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:17,382 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:17,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,525 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:17,527 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:17,534 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:17,535 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 [2020-11-29 21:20:17,546 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:17,546 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:17,568 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:17,569 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:17,588 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:17,589 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:17,622 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:17,622 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:17,631 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:17,631 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:17,653 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:17,653 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:17,656 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:17,656 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:17,687 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:17,687 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:17,728 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:20:17,729 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:17,771 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:20:17,773 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:17,773 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:17,773 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:17,773 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:17,773 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:20:17,773 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:17,773 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:17,773 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:17,774 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2020-11-29 21:20:17,774 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:17,774 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:17,775 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:17,887 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:17,891 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:17,895 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 [2020-11-29 21:20:17,899 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:17,899 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:17,900 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:17,900 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:17,900 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:17,902 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:17,903 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:17,906 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:17,947 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 [2020-11-29 21:20:17,949 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:17,949 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:17,949 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:17,949 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:17,950 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:17,953 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:17,953 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:17,961 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:17,997 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 [2020-11-29 21:20:17,999 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:17,999 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:17,999 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:17,999 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:18,000 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:18,001 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:18,001 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:18,003 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:18,034 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 [2020-11-29 21:20:18,036 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:18,036 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:18,036 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:18,036 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:18,036 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:18,037 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:18,037 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:18,039 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:18,063 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 [2020-11-29 21:20:18,065 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:18,065 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:18,065 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:18,065 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:18,065 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:18,067 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:18,067 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:18,090 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:20:18,098 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:20:18,099 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_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:18,108 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:20:18,108 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:20:18,108 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:20:18,109 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:18,144 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:20:18,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:18,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 21:20:18,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:18,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:18,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:18,281 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 21:20:18,282 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-11-29 21:20:18,464 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-11-29 21:20:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:18,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 21:20:18,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-29 21:20:18,473 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-11-29 21:20:18,474 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:18,474 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-11-29 21:20:18,474 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:18,475 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-29 21:20:18,475 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:18,476 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-11-29 21:20:18,486 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 21:20:18,495 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-11-29 21:20:18,496 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-29 21:20:18,496 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-11-29 21:20:18,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-11-29 21:20:18,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:18,497 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-11-29 21:20:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-11-29 21:20:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-11-29 21:20:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 21:20:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-11-29 21:20:18,539 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-11-29 21:20:18,539 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-11-29 21:20:18,539 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 21:20:18,539 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-11-29 21:20:18,542 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 21:20:18,542 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:18,542 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:18,543 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:20:18,543 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:20:18,544 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-11-29 21:20:18,544 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-11-29 21:20:18,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:18,544 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-11-29 21:20:18,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:18,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787238688] [2020-11-29 21:20:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:18,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:20:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 21:20:18,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787238688] [2020-11-29 21:20:18,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:20:18,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 21:20:18,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154905735] [2020-11-29 21:20:18,660 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:20:18,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:18,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-11-29 21:20:18,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:18,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950539281] [2020-11-29 21:20:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:18,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 21:20:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 21:20:18,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950539281] [2020-11-29 21:20:18,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:20:18,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 21:20:18,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120612487] [2020-11-29 21:20:18,722 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 21:20:18,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:20:18,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:20:18,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 21:20:18,726 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-11-29 21:20:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:20:18,833 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-11-29 21:20:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 21:20:18,838 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-11-29 21:20:18,840 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 21:20:18,841 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-11-29 21:20:18,841 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-11-29 21:20:18,842 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-11-29 21:20:18,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-11-29 21:20:18,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:18,842 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 21:20:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-11-29 21:20:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 21:20:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 21:20:18,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-11-29 21:20:18,849 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 21:20:18,849 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 21:20:18,849 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 21:20:18,849 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-11-29 21:20:18,850 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 21:20:18,850 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:18,850 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:18,851 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:20:18,851 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-29 21:20:18,851 INFO L794 eck$LassoCheckResult]: Stem: 205#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-11-29 21:20:18,852 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-11-29 21:20:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-11-29 21:20:18,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:18,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352584968] [2020-11-29 21:20:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:18,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 21:20:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352584968] [2020-11-29 21:20:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374253804] [2020-11-29 21:20:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:20:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:18,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:20:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:19,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:20:19,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 21:20:19,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500151015] [2020-11-29 21:20:19,045 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:20:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:19,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-11-29 21:20:19,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:19,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613176251] [2020-11-29 21:20:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:19,064 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:19,073 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:19,075 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:19,378 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:19,378 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:19,378 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:19,379 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:19,379 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:20:19,379 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:19,379 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:19,379 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:19,379 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2020-11-29 21:20:19,379 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:19,379 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:19,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:19,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:19,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:19,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:19,462 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:19,462 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:19,484 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:19,484 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:19,490 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:19,490 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:19,512 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:19,512 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:19,514 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:19,514 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:19,536 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:19,536 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:19,538 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:19,538 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:19,567 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:19,567 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:19,606 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:20:19,606 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:20,478 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:20:20,481 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:20,481 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:20,481 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:20,481 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:20,481 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:20:20,481 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:20,481 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:20,481 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:20,481 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2020-11-29 21:20:20,481 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:20,481 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:20,482 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:20,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:20,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:20,531 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:20,587 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:20,587 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:20,610 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 [2020-11-29 21:20:20,612 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:20,612 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:20,612 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:20,612 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:20,612 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:20,613 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:20,613 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:20,615 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:20,654 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 [2020-11-29 21:20:20,656 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:20,656 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:20,656 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:20,656 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:20,656 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:20,657 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:20,657 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:20,659 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:20:20,700 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 [2020-11-29 21:20:20,704 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:20,704 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:20,704 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:20,704 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:20,704 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:20,710 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:20,710 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:20,714 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:20:20,719 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:20:20,719 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_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:20,723 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:20:20,723 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:20:20,723 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:20:20,723 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:20,763 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:20:20,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:20,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 21:20:20,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:20,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 21:20:20,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:20:21,120 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-11-29 21:20:21,120 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-11-29 21:20:21,488 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-11-29 21:20:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:21,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 21:20:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-11-29 21:20:21,491 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-11-29 21:20:21,492 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:21,492 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-11-29 21:20:21,493 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:21,493 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-11-29 21:20:21,494 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:21,495 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-11-29 21:20:21,514 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-11-29 21:20:21,521 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-11-29 21:20:21,521 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-11-29 21:20:21,522 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-11-29 21:20:21,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-11-29 21:20:21,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:21,523 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-11-29 21:20:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-11-29 21:20:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-11-29 21:20:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 21:20:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-11-29 21:20:21,541 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-11-29 21:20:21,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:20:21,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 21:20:21,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:20:21,546 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-11-29 21:20:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:20:21,707 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-11-29 21:20:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:20:21,708 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-11-29 21:20:21,713 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-11-29 21:20:21,717 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-11-29 21:20:21,717 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-11-29 21:20:21,718 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-11-29 21:20:21,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-11-29 21:20:21,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:21,718 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-11-29 21:20:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-11-29 21:20:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-11-29 21:20:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 21:20:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-11-29 21:20:21,731 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-11-29 21:20:21,731 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-11-29 21:20:21,731 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 21:20:21,732 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-11-29 21:20:21,743 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-11-29 21:20:21,744 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:21,744 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:21,745 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:20:21,747 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 21:20:21,748 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-11-29 21:20:21,748 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-11-29 21:20:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-11-29 21:20:21,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:21,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782199842] [2020-11-29 21:20:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:21,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 21:20:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:21,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:20:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:21,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 21:20:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 21:20:21,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782199842] [2020-11-29 21:20:21,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87669383] [2020-11-29 21:20:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:20:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 21:20:22,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 21:20:22,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:20:22,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 21:20:22,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193418455] [2020-11-29 21:20:22,077 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:20:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:22,078 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-11-29 21:20:22,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:22,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769708250] [2020-11-29 21:20:22,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:22,081 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:22,088 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:22,092 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:22,213 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:22,213 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:22,213 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:22,213 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:22,213 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:20:22,213 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:22,213 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:22,213 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:22,213 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration4_Loop [2020-11-29 21:20:22,213 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:22,213 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:22,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:22,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:22,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:22,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:22,284 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:22,285 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:22,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:22,290 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:22,293 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:22,293 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:22,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:22,329 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:22,365 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:20:22,365 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:23,445 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:20:23,447 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:23,447 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:23,447 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:23,447 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:23,447 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:20:23,447 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:23,447 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:23,447 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:23,447 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration4_Loop [2020-11-29 21:20:23,447 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:23,447 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:23,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:23,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:23,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:23,473 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:23,526 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:23,526 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:23,534 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 [2020-11-29 21:20:23,535 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:23,535 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:23,546 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:23,546 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:23,546 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:23,548 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:23,548 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:23,550 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:23,572 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 [2020-11-29 21:20:23,573 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:23,573 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:23,573 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:23,573 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:23,573 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:23,575 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:23,575 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:23,578 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:20:23,587 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:20:23,587 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_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:23,589 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:20:23,589 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:20:23,589 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:20:23,590 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 21:20:23,608 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:20:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:23,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 21:20:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:23,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:23,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:23,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 21:20:23,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:23,832 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-11-29 21:20:23,832 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-11-29 21:20:24,106 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-11-29 21:20:24,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 21:20:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-11-29 21:20:24,111 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 21:20:24,111 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:24,111 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 21:20:24,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:24,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:24,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:24,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 21:20:24,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:24,345 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2020-11-29 21:20:24,345 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-11-29 21:20:24,530 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-11-29 21:20:24,535 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 [2020-11-29 21:20:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 21:20:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-11-29 21:20:24,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 21:20:24,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:24,536 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:24,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:24,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 21:20:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:24,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:24,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:24,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 21:20:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:24,719 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 6 loop predicates [2020-11-29 21:20:24,720 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-11-29 21:20:25,044 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-11-29 21:20:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 21:20:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-11-29 21:20:25,045 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 21:20:25,048 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:25,048 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-11-29 21:20:25,049 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:25,049 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-11-29 21:20:25,054 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:25,055 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-11-29 21:20:25,069 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-11-29 21:20:25,082 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-11-29 21:20:25,083 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-11-29 21:20:25,083 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-11-29 21:20:25,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-11-29 21:20:25,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:25,084 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-11-29 21:20:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-11-29 21:20:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-11-29 21:20:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-11-29 21:20:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-11-29 21:20:25,145 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-11-29 21:20:25,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:20:25,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 21:20:25,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:20:25,147 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-11-29 21:20:25,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:20:25,413 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-11-29 21:20:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 21:20:25,414 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-11-29 21:20:25,423 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:25,434 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-11-29 21:20:25,434 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-11-29 21:20:25,435 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-11-29 21:20:25,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-11-29 21:20:25,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:25,435 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-11-29 21:20:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-11-29 21:20:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-11-29 21:20:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-11-29 21:20:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-11-29 21:20:25,477 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-11-29 21:20:25,478 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-11-29 21:20:25,478 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 21:20:25,478 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-11-29 21:20:25,482 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:25,482 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:25,482 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:25,484 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:20:25,484 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 21:20:25,484 INFO L794 eck$LassoCheckResult]: Stem: 3811#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3863#L10 assume !(1 == ~n); 3859#L13 call #t~ret7 := fibo(~n - 1);< 3861#fiboENTRY ~n := #in~n; 3862#L8 assume !(~n < 1); 3858#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3856#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3857#L8 assume !(~n < 1); 3840#L10 assume 1 == ~n;#res := 1; 3843#fiboFINAL assume true; 3915#fiboEXIT >#35#return; 3909#L13-1 call #t~ret8 := fibo(~n - 2);< 3911#fiboENTRY ~n := #in~n; 4104#L8 assume !(~n < 1); 4031#L10 assume !(1 == ~n); 4032#L13 call #t~ret7 := fibo(~n - 1);< 4042#fiboENTRY ~n := #in~n; 4068#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4050#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-11-29 21:20:25,484 INFO L796 eck$LassoCheckResult]: Loop: 4060#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4066#L10 assume !(1 == ~n); 4059#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-11-29 21:20:25,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:25,485 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-11-29 21:20:25,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:25,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432260302] [2020-11-29 21:20:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:25,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-29 21:20:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:20:25,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432260302] [2020-11-29 21:20:25,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229144054] [2020-11-29 21:20:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:20:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:25,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 21:20:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 21:20:25,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:20:25,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 21:20:25,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850455459] [2020-11-29 21:20:25,728 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:20:25,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:25,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-11-29 21:20:25,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:25,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659129872] [2020-11-29 21:20:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:25,732 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:25,736 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:25,737 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:25,805 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:25,805 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:25,805 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:25,805 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:25,805 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:20:25,805 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:25,805 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:25,806 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:25,806 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2020-11-29 21:20:25,806 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:25,806 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:25,807 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:25,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:25,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:25,817 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:25,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:25,877 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:25,877 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:25,881 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:25,881 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:25,885 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:25,885 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:25,922 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:25,922 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:25,925 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:25,925 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:20:25,961 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:25,961 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:25,967 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:25,967 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:20:26,004 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:26,004 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:20:26,042 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:20:26,042 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:26,109 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:20:26,111 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:26,111 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:26,111 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:26,111 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:26,111 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:20:26,111 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:26,111 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:26,111 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:26,111 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2020-11-29 21:20:26,111 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:26,111 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:26,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:26,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:26,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:26,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:26,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:26,217 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:26,217 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:26,232 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 [2020-11-29 21:20:26,233 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:26,233 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:26,234 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:26,234 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:26,234 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:26,234 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:26,235 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:26,236 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:26,266 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 [2020-11-29 21:20:26,267 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:26,267 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:26,267 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:26,267 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:26,268 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:26,268 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:26,268 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:26,270 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:26,306 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 [2020-11-29 21:20:26,307 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:26,308 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:26,308 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:26,308 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:26,308 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:26,309 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:26,309 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:26,310 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:26,355 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 [2020-11-29 21:20:26,358 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:26,358 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:26,358 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:26,359 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:26,359 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:26,360 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:26,360 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:26,361 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:26,392 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 [2020-11-29 21:20:26,393 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:26,393 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:26,393 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:26,393 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:26,393 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:26,394 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:26,394 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:26,399 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:20:26,409 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:20:26,409 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_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:26,411 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:20:26,412 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:20:26,412 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:20:26,412 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:26,447 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:20:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:26,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 21:20:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:26,596 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 21:20:26,596 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-11-29 21:20:26,690 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-11-29 21:20:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 21:20:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-11-29 21:20:26,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 21:20:26,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:26,693 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:26,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 21:20:26,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:26,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:26,838 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 21:20:26,838 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-11-29 21:20:26,947 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-11-29 21:20:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 21:20:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-11-29 21:20:26,948 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 21:20:26,948 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:26,948 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 21:20:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:27,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:27,075 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 21:20:27,075 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-11-29 21:20:27,213 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 617 states and 861 transitions. Complement of second has 14 states. [2020-11-29 21:20:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 21:20:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-11-29 21:20:27,220 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 21:20:27,221 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:27,222 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-11-29 21:20:27,223 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:27,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-11-29 21:20:27,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:27,224 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-11-29 21:20:27,233 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:27,243 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-11-29 21:20:27,243 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-11-29 21:20:27,244 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-11-29 21:20:27,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-11-29 21:20:27,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:27,244 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-11-29 21:20:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-11-29 21:20:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-11-29 21:20:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-11-29 21:20:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-11-29 21:20:27,270 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-11-29 21:20:27,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:20:27,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 21:20:27,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-29 21:20:27,272 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-11-29 21:20:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:20:27,528 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-11-29 21:20:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 21:20:27,530 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-11-29 21:20:27,539 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:27,548 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-11-29 21:20:27,548 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-11-29 21:20:27,549 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-11-29 21:20:27,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-11-29 21:20:27,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:27,551 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-11-29 21:20:27,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-11-29 21:20:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-11-29 21:20:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-11-29 21:20:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-11-29 21:20:27,577 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-11-29 21:20:27,577 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-11-29 21:20:27,577 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 21:20:27,577 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-11-29 21:20:27,581 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:27,581 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:27,582 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:27,583 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:20:27,584 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 21:20:27,584 INFO L794 eck$LassoCheckResult]: Stem: 7334#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7329#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 7325#L27 call main_#t~ret9 := fibo(main_~x~0);< 7347#fiboENTRY ~n := #in~n; 7348#L8 assume !(~n < 1); 7391#L10 assume !(1 == ~n); 7383#L13 call #t~ret7 := fibo(~n - 1);< 7384#fiboENTRY ~n := #in~n; 7393#L8 assume !(~n < 1); 7392#L10 assume !(1 == ~n); 7376#L13 call #t~ret7 := fibo(~n - 1);< 7388#fiboENTRY ~n := #in~n; 7387#L8 assume !(~n < 1); 7386#L10 assume !(1 == ~n); 7380#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7515#L8 assume !(~n < 1); 7426#L10 assume !(1 == ~n); 7379#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7493#L8 assume !(~n < 1); 7491#L10 assume 1 == ~n;#res := 1; 7487#fiboFINAL assume true; 7463#fiboEXIT >#35#return; 7448#L13-1 call #t~ret8 := fibo(~n - 2);< 7451#fiboENTRY ~n := #in~n; 7744#L8 assume !(~n < 1); 7741#L10 assume !(1 == ~n); 7351#L13 call #t~ret7 := fibo(~n - 1);< 7358#fiboENTRY ~n := #in~n; 7359#L8 assume !(~n < 1); 7794#L10 assume !(1 == ~n); 7363#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-11-29 21:20:27,584 INFO L796 eck$LassoCheckResult]: Loop: 7362#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-11-29 21:20:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:27,585 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-11-29 21:20:27,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:27,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909646164] [2020-11-29 21:20:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:27,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 21:20:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 21:20:27,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909646164] [2020-11-29 21:20:27,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963375411] [2020-11-29 21:20:27,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:20:27,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:20:27,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:20:27,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 21:20:27,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 21:20:27,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:20:27,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 21:20:27,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876850461] [2020-11-29 21:20:27,942 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:20:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:27,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-11-29 21:20:27,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:27,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038277789] [2020-11-29 21:20:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:27,945 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:27,946 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:27,947 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:28,020 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:28,020 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:28,020 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:28,020 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:28,020 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:20:28,020 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:28,021 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:28,021 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:28,021 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2020-11-29 21:20:28,021 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:28,021 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:28,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:28,024 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:28,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:28,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:28,089 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:28,089 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:28,095 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:28,095 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:28,097 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:28,097 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:28,122 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:28,124 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:28,126 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:28,126 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:28,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:28,148 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:28,187 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:20:28,187 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:34,824 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:20:34,826 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:34,826 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:34,826 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:34,826 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:34,826 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:20:34,826 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:34,827 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:34,827 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:34,827 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2020-11-29 21:20:34,827 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:34,827 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:34,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:34,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:34,834 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:34,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:34,896 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:34,897 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:34,900 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 [2020-11-29 21:20:34,901 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:34,901 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:34,901 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:34,901 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:34,902 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:34,902 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:34,902 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:34,903 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:34,924 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 [2020-11-29 21:20:34,925 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:34,925 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:34,925 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:34,925 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:34,925 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:34,926 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:34,926 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:34,927 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:34,947 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 [2020-11-29 21:20:34,948 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:34,949 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:34,949 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:34,949 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:34,949 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:34,950 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:34,950 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:34,952 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:20:34,954 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 21:20:34,954 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:34,956 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:20:34,956 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:20:34,956 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:20:34,956 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 21:20:34,975 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:20:34,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 21:20:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:35,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:35,122 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:35,123 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-11-29 21:20:35,204 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 523 states and 769 transitions. Complement of second has 18 states. [2020-11-29 21:20:35,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 21:20:35,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-11-29 21:20:35,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:35,206 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:35,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 21:20:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:35,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:35,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:35,402 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:35,403 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-11-29 21:20:35,533 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 753 states and 1085 transitions. Complement of second has 22 states. [2020-11-29 21:20:35,534 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 [2020-11-29 21:20:35,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 21:20:35,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-11-29 21:20:35,535 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:35,535 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-11-29 21:20:35,535 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:35,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-11-29 21:20:35,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:35,536 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-11-29 21:20:35,548 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:35,560 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-11-29 21:20:35,560 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-11-29 21:20:35,561 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-11-29 21:20:35,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-11-29 21:20:35,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:35,561 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-11-29 21:20:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-11-29 21:20:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-11-29 21:20:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-11-29 21:20:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-11-29 21:20:35,589 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-11-29 21:20:35,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:20:35,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 21:20:35,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-29 21:20:35,590 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-11-29 21:20:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:20:35,893 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-11-29 21:20:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 21:20:35,894 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-11-29 21:20:35,904 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:35,916 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-11-29 21:20:35,916 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-11-29 21:20:35,917 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-11-29 21:20:35,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-11-29 21:20:35,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:35,917 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-11-29 21:20:35,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-11-29 21:20:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-11-29 21:20:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-11-29 21:20:35,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-11-29 21:20:35,945 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 21:20:35,945 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 21:20:35,945 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 21:20:35,946 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-11-29 21:20:35,951 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:35,951 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:35,951 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:35,953 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:20:35,953 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 21:20:35,953 INFO L794 eck$LassoCheckResult]: Stem: 10978#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10969#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 10970#L27 call main_#t~ret9 := fibo(main_~x~0);< 10986#fiboENTRY ~n := #in~n; 11071#L8 assume !(~n < 1); 11069#L10 assume !(1 == ~n); 11066#L13 call #t~ret7 := fibo(~n - 1);< 11067#fiboENTRY ~n := #in~n; 11101#L8 assume !(~n < 1); 11100#L10 assume !(1 == ~n); 11078#L13 call #t~ret7 := fibo(~n - 1);< 11081#fiboENTRY ~n := #in~n; 11099#L8 assume !(~n < 1); 11083#L10 assume !(1 == ~n); 11073#L13 call #t~ret7 := fibo(~n - 1);< 11079#fiboENTRY ~n := #in~n; 11110#L8 assume !(~n < 1); 11109#L10 assume !(1 == ~n); 11095#L13 call #t~ret7 := fibo(~n - 1);< 11108#fiboENTRY ~n := #in~n; 11141#L8 assume !(~n < 1); 11130#L10 assume !(1 == ~n); 11096#L13 call #t~ret7 := fibo(~n - 1);< 11129#fiboENTRY ~n := #in~n; 11174#L8 assume !(~n < 1); 11161#L10 assume 1 == ~n;#res := 1; 11158#fiboFINAL assume true; 11156#fiboEXIT >#35#return; 11136#L13-1 call #t~ret8 := fibo(~n - 2);< 11138#fiboENTRY ~n := #in~n; 11152#L8 assume ~n < 1;#res := 0; 11149#fiboFINAL assume true; 11135#fiboEXIT >#37#return; 11134#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 11128#fiboFINAL assume true; 11107#fiboEXIT >#35#return; 11091#L13-1 call #t~ret8 := fibo(~n - 2);< 11098#fiboENTRY ~n := #in~n; 11159#L8 assume !(~n < 1); 11120#L10 assume !(1 == ~n); 11122#L13 call #t~ret7 := fibo(~n - 1);< 11148#fiboENTRY ~n := #in~n; 11320#L8 assume !(~n < 1); 11318#L10 assume !(1 == ~n); 11304#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-11-29 21:20:35,953 INFO L796 eck$LassoCheckResult]: Loop: 11305#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-11-29 21:20:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-11-29 21:20:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:35,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48359616] [2020-11-29 21:20:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:36,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 21:20:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:20:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:36,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 21:20:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 21:20:36,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48359616] [2020-11-29 21:20:36,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468892608] [2020-11-29 21:20:36,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:20:36,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:20:36,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:20:36,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 21:20:36,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 21:20:36,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:20:36,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 21:20:36,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429536858] [2020-11-29 21:20:36,269 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:20:36,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:36,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-11-29 21:20:36,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:36,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527401585] [2020-11-29 21:20:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:36,273 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:36,274 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:36,275 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:36,322 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:36,322 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:36,322 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:36,323 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:36,323 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:20:36,323 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:36,323 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:36,323 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:36,323 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2020-11-29 21:20:36,323 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:36,323 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:36,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:36,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:36,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:36,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:36,400 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:36,400 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 21:20:36,404 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:36,404 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:36,433 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:20:36,433 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:37,864 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:20:37,866 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:37,866 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:37,866 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:37,866 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:37,866 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:20:37,866 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:37,866 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:37,867 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:37,867 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2020-11-29 21:20:37,867 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:37,867 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:37,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:37,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:37,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:37,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:37,920 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:37,920 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:37,924 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 [2020-11-29 21:20:37,926 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:37,926 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:37,926 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:37,926 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:37,926 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:37,926 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:37,926 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:37,927 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:37,949 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 [2020-11-29 21:20:37,950 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:37,950 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:37,950 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:37,950 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:37,950 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:37,950 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:37,950 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:37,951 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:37,973 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 [2020-11-29 21:20:37,974 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:37,974 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:37,974 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:37,974 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:37,974 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:37,975 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:37,975 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:37,976 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:38,000 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 [2020-11-29 21:20:38,001 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:38,001 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:38,001 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:38,001 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:38,001 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:38,002 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:38,003 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:38,013 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:20:38,016 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 21:20:38,016 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:38,025 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:20:38,025 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:20:38,025 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:20:38,026 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:38,046 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:20:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:38,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 21:20:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:38,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:38,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:38,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:38,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:38,287 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:38,287 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-11-29 21:20:38,357 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 731 states and 1065 transitions. Complement of second has 18 states. [2020-11-29 21:20:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 21:20:38,359 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 21:20:38,359 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:38,360 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:38,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 21:20:38,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:38,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:38,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:38,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:38,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:38,567 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:38,567 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-11-29 21:20:38,688 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 916 states and 1284 transitions. Complement of second has 22 states. [2020-11-29 21:20:38,692 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 [2020-11-29 21:20:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 21:20:38,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 21:20:38,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:38,693 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:38,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 21:20:38,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:38,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:38,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:38,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:38,868 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:38,868 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-11-29 21:20:38,968 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 959 states and 1365 transitions. Complement of second has 27 states. [2020-11-29 21:20:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 21:20:38,970 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 21:20:38,970 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:38,970 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-11-29 21:20:38,971 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:38,971 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-11-29 21:20:38,972 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:38,972 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-11-29 21:20:38,983 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:38,994 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-11-29 21:20:38,994 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-11-29 21:20:38,995 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-11-29 21:20:38,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-11-29 21:20:38,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:38,996 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 21:20:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-11-29 21:20:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-11-29 21:20:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-11-29 21:20:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-11-29 21:20:39,022 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 21:20:39,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:20:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 21:20:39,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-29 21:20:39,023 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-11-29 21:20:39,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:20:39,431 INFO L93 Difference]: Finished difference Result 777 states and 1127 transitions. [2020-11-29 21:20:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 21:20:39,432 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1127 transitions. [2020-11-29 21:20:39,441 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:39,451 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1127 transitions. [2020-11-29 21:20:39,452 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-11-29 21:20:39,452 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-11-29 21:20:39,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1127 transitions. [2020-11-29 21:20:39,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:39,453 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1127 transitions. [2020-11-29 21:20:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1127 transitions. [2020-11-29 21:20:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 736. [2020-11-29 21:20:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-11-29 21:20:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-11-29 21:20:39,480 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-11-29 21:20:39,480 INFO L594 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-11-29 21:20:39,480 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 21:20:39,480 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 736 states and 1081 transitions. [2020-11-29 21:20:39,485 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:39,485 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:39,486 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:39,487 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 21:20:39,487 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 21:20:39,487 INFO L794 eck$LassoCheckResult]: Stem: 16565#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16555#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 16556#L27 call main_#t~ret9 := fibo(main_~x~0);< 16581#fiboENTRY ~n := #in~n; 16655#L8 assume !(~n < 1); 16654#L10 assume !(1 == ~n); 16650#L13 call #t~ret7 := fibo(~n - 1);< 16653#fiboENTRY ~n := #in~n; 16652#L8 assume !(~n < 1); 16651#L10 assume !(1 == ~n); 16646#L13 call #t~ret7 := fibo(~n - 1);< 16649#fiboENTRY ~n := #in~n; 16648#L8 assume !(~n < 1); 16647#L10 assume !(1 == ~n); 16639#L13 call #t~ret7 := fibo(~n - 1);< 16645#fiboENTRY ~n := #in~n; 16643#L8 assume !(~n < 1); 16641#L10 assume !(1 == ~n); 16627#L13 call #t~ret7 := fibo(~n - 1);< 16632#fiboENTRY ~n := #in~n; 16637#L8 assume !(~n < 1); 16635#L10 assume !(1 == ~n); 16626#L13 call #t~ret7 := fibo(~n - 1);< 16632#fiboENTRY ~n := #in~n; 16638#L8 assume !(~n < 1); 16636#L10 assume 1 == ~n;#res := 1; 16633#fiboFINAL assume true; 16625#fiboEXIT >#35#return; 16622#L13-1 call #t~ret8 := fibo(~n - 2);< 16621#fiboENTRY ~n := #in~n; 16623#L8 assume !(~n < 1); 16800#L10 assume !(1 == ~n); 16618#L13 call #t~ret7 := fibo(~n - 1);< 16629#fiboENTRY ~n := #in~n; 16644#L8 assume !(~n < 1); 17177#L10 assume !(1 == ~n); 16574#L13 call #t~ret7 := fibo(~n - 1);< 17212#fiboENTRY ~n := #in~n; 17254#L8 assume !(~n < 1); 17253#L10 assume 1 == ~n;#res := 1; 17216#fiboFINAL assume true; 17211#fiboEXIT >#35#return; 16933#L13-1 call #t~ret8 := fibo(~n - 2);< 16936#fiboENTRY ~n := #in~n; 17208#L8 assume ~n < 1;#res := 0; 17205#fiboFINAL assume true; 16931#fiboEXIT >#37#return; 16822#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 16821#fiboFINAL assume true; 16801#fiboEXIT >#35#return; 16746#L13-1 call #t~ret8 := fibo(~n - 2);< 16754#fiboENTRY ~n := #in~n; 16812#L8 assume !(~n < 1); 16807#L10 assume !(1 == ~n); 16809#L13 call #t~ret7 := fibo(~n - 1);< 16834#fiboENTRY ~n := #in~n; 16891#L8 assume !(~n < 1); 17022#L10 assume !(1 == ~n); 16925#L13 call #t~ret7 := fibo(~n - 1);< 16929#fiboENTRY ~n := #in~n; 16967#L8 assume !(~n < 1); 16966#L10 assume !(1 == ~n); 16926#L13 [2020-11-29 21:20:39,488 INFO L796 eck$LassoCheckResult]: Loop: 16926#L13 call #t~ret7 := fibo(~n - 1);< 16929#fiboENTRY ~n := #in~n; 16967#L8 assume !(~n < 1); 16966#L10 assume !(1 == ~n); 16926#L13 [2020-11-29 21:20:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-11-29 21:20:39,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:39,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665448103] [2020-11-29 21:20:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:39,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 21:20:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:39,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-29 21:20:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:39,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:20:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:39,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 21:20:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-29 21:20:39,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665448103] [2020-11-29 21:20:39,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208317309] [2020-11-29 21:20:39,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:20:39,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 21:20:39,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:20:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 21:20:39,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-29 21:20:39,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:20:39,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-11-29 21:20:39,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043346807] [2020-11-29 21:20:39,897 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:20:39,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:39,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-11-29 21:20:39,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:39,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940708860] [2020-11-29 21:20:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:39,900 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:39,901 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:39,902 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:39,966 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:39,966 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:39,966 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:39,966 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:39,966 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:20:39,966 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:39,967 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:39,967 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:39,967 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2020-11-29 21:20:39,967 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:39,967 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:39,967 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:39,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:39,986 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:39,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:40,048 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:40,048 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:40,053 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:40,053 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:40,055 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:40,055 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:40,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:40,077 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:40,079 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:40,079 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:40,101 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:40,101 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:40,126 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:20:40,126 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:41,553 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:20:41,555 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:41,555 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:41,555 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:41,555 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:41,555 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:20:41,555 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:41,555 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:41,555 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:41,555 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration8_Loop [2020-11-29 21:20:41,556 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:41,556 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:41,556 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:41,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:41,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:41,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:41,624 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:41,624 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:41,626 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 [2020-11-29 21:20:41,627 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:41,628 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:41,628 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:41,628 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:41,628 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:41,628 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:41,628 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:41,629 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:41,651 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 [2020-11-29 21:20:41,652 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:41,652 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:41,652 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:41,652 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:41,652 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:41,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:41,652 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:41,653 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:41,674 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 [2020-11-29 21:20:41,676 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:41,676 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:41,676 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:41,676 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:41,676 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:41,677 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:41,677 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:41,679 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:20:41,681 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 21:20:41,681 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:41,683 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:20:41,683 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:20:41,683 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:20:41,683 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 21:20:41,702 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:20:41,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:41,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 21:20:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:41,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:41,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:41,910 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:41,910 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-11-29 21:20:41,978 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 755 states and 1101 transitions. Complement of second has 18 states. [2020-11-29 21:20:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:41,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 21:20:41,979 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 21:20:41,980 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:41,980 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 21:20:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:42,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:42,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:42,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:42,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:42,189 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:42,189 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-11-29 21:20:42,356 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 940 states and 1320 transitions. Complement of second has 22 states. [2020-11-29 21:20:42,357 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 [2020-11-29 21:20:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 21:20:42,357 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 21:20:42,358 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:42,358 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:42,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 21:20:42,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:42,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:42,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:42,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:42,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:42,728 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:42,728 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-11-29 21:20:42,820 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 983 states and 1401 transitions. Complement of second has 27 states. [2020-11-29 21:20:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 21:20:42,822 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 21:20:42,822 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:42,822 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-11-29 21:20:42,823 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:42,823 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-11-29 21:20:42,824 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:42,824 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 983 states and 1401 transitions. [2020-11-29 21:20:42,835 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 21:20:42,846 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 983 states to 736 states and 1081 transitions. [2020-11-29 21:20:42,846 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 231 [2020-11-29 21:20:42,847 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 267 [2020-11-29 21:20:42,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 736 states and 1081 transitions. [2020-11-29 21:20:42,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:42,848 INFO L691 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-11-29 21:20:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states and 1081 transitions. [2020-11-29 21:20:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2020-11-29 21:20:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-11-29 21:20:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-11-29 21:20:42,875 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-11-29 21:20:42,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:20:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 21:20:42,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-11-29 21:20:42,876 INFO L87 Difference]: Start difference. First operand 736 states and 1081 transitions. Second operand 23 states. [2020-11-29 21:20:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:20:43,512 INFO L93 Difference]: Finished difference Result 456 states and 590 transitions. [2020-11-29 21:20:43,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 21:20:43,512 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 456 states and 590 transitions. [2020-11-29 21:20:43,518 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 21:20:43,523 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 456 states to 384 states and 507 transitions. [2020-11-29 21:20:43,523 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 165 [2020-11-29 21:20:43,524 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 184 [2020-11-29 21:20:43,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 384 states and 507 transitions. [2020-11-29 21:20:43,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:43,524 INFO L691 BuchiCegarLoop]: Abstraction has 384 states and 507 transitions. [2020-11-29 21:20:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states and 507 transitions. [2020-11-29 21:20:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2020-11-29 21:20:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-29 21:20:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-11-29 21:20:43,536 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-11-29 21:20:43,536 INFO L594 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-11-29 21:20:43,536 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 21:20:43,536 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 318 states and 425 transitions. [2020-11-29 21:20:43,539 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 21:20:43,539 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:43,539 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:43,540 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-11-29 21:20:43,541 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 21:20:43,541 INFO L794 eck$LassoCheckResult]: Stem: 22131#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22122#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 22123#L27 call main_#t~ret9 := fibo(main_~x~0);< 22144#fiboENTRY ~n := #in~n; 22237#L8 assume !(~n < 1); 22235#L10 assume !(1 == ~n); 22215#L13 call #t~ret7 := fibo(~n - 1);< 22230#fiboENTRY ~n := #in~n; 22224#L8 assume !(~n < 1); 22221#L10 assume !(1 == ~n); 22217#L13 call #t~ret7 := fibo(~n - 1);< 22218#fiboENTRY ~n := #in~n; 22272#L8 assume !(~n < 1); 22271#L10 assume !(1 == ~n); 22232#L13 call #t~ret7 := fibo(~n - 1);< 22234#fiboENTRY ~n := #in~n; 22241#L8 assume !(~n < 1); 22240#L10 assume !(1 == ~n); 22227#L13 call #t~ret7 := fibo(~n - 1);< 22239#fiboENTRY ~n := #in~n; 22257#L8 assume !(~n < 1); 22254#L10 assume !(1 == ~n); 22111#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22277#fiboENTRY ~n := #in~n; 22410#L8 assume !(~n < 1); 22409#L10 assume 1 == ~n;#res := 1; 22408#fiboFINAL assume true; 22407#fiboEXIT >#35#return; 22110#L13-1 call #t~ret8 := fibo(~n - 2);< 22113#fiboENTRY ~n := #in~n; 22418#L8 assume ~n < 1;#res := 0; 22416#fiboFINAL assume true; 22414#fiboEXIT >#37#return; 22412#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22411#fiboFINAL assume true; 22297#fiboEXIT >#35#return; 22288#L13-1 call #t~ret8 := fibo(~n - 2);< 22290#fiboENTRY ~n := #in~n; 22349#L8 assume !(~n < 1); 22312#L10 assume 1 == ~n;#res := 1; 22308#fiboFINAL assume true; 22287#fiboEXIT >#37#return; 22283#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22281#fiboFINAL assume true; 22280#fiboEXIT >#35#return; 22245#L13-1 call #t~ret8 := fibo(~n - 2);< 22248#fiboENTRY ~n := #in~n; 22316#L8 assume !(~n < 1); 22313#L10 assume !(1 == ~n); 22136#L13 call #t~ret7 := fibo(~n - 1);< 22126#fiboENTRY ~n := #in~n; 22204#L8 assume !(~n < 1); 22205#L10 assume !(1 == ~n); 22173#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22171#L13 [2020-11-29 21:20:43,541 INFO L796 eck$LassoCheckResult]: Loop: 22171#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22171#L13 [2020-11-29 21:20:43,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash 817988141, now seen corresponding path program 4 times [2020-11-29 21:20:43,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:43,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860541249] [2020-11-29 21:20:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:43,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 21:20:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:43,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:20:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:43,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:20:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:43,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 21:20:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:43,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 21:20:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-29 21:20:43,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860541249] [2020-11-29 21:20:43,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655200075] [2020-11-29 21:20:43,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:20:43,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 21:20:43,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:20:43,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 21:20:43,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-29 21:20:44,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:20:44,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 21:20:44,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164171276] [2020-11-29 21:20:44,061 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:20:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-11-29 21:20:44,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:44,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507927009] [2020-11-29 21:20:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:44,068 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:44,069 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:44,070 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:44,136 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:44,136 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:44,137 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:44,137 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:44,137 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:20:44,137 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:44,137 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:44,137 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:44,137 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2020-11-29 21:20:44,137 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:44,137 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:44,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:44,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:44,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:44,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:44,253 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:44,253 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:44,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:44,268 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:44,271 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:44,271 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:44,306 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:44,307 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:44,310 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:44,310 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:44,347 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:44,347 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:44,350 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:44,350 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:44,389 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:44,389 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) [2020-11-29 21:20:44,431 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:20:44,431 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:51,721 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:20:51,723 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:51,723 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:51,723 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:51,723 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:51,723 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:20:51,723 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:51,723 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:51,724 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:51,724 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration9_Loop [2020-11-29 21:20:51,724 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:51,724 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:51,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:51,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:51,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:51,751 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:51,806 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:51,806 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 75 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 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:51,808 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 [2020-11-29 21:20:51,809 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:51,809 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:51,809 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:51,809 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:51,809 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:51,810 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:51,810 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:51,811 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 76 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 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:51,832 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 [2020-11-29 21:20:51,833 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:51,833 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:51,834 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:51,834 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:51,834 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:51,834 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:51,834 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:51,835 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 77 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 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:51,858 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 [2020-11-29 21:20:51,859 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:20:51,859 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:20:51,860 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:20:51,860 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:20:51,860 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:20:51,861 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:20:51,861 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:20:51,863 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:20:51,864 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 21:20:51,864 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:51,866 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:20:51,867 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:20:51,867 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:20:51,867 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 21:20:51,887 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:20:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:52,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 21:20:52,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:52,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:52,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:52,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:52,101 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:52,101 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-11-29 21:20:52,178 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 337 states and 445 transitions. Complement of second has 18 states. [2020-11-29 21:20:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 21:20:52,179 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2020-11-29 21:20:52,179 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:52,180 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:52,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:52,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 21:20:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:52,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:52,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:52,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:52,401 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:52,401 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-11-29 21:20:52,523 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 343 states and 451 transitions. Complement of second has 17 states. [2020-11-29 21:20:52,524 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 [2020-11-29 21:20:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 21:20:52,524 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2020-11-29 21:20:52,525 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:52,525 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:20:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 21:20:52,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:52,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:20:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:52,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:20:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:20:52,784 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:20:52,784 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-11-29 21:20:52,862 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 424 states and 555 transitions. Complement of second has 27 states. [2020-11-29 21:20:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:20:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:20:52,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 21:20:52,863 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2020-11-29 21:20:52,864 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:52,864 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-11-29 21:20:52,865 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:52,865 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-29 21:20:52,865 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:20:52,865 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 424 states and 555 transitions. [2020-11-29 21:20:52,870 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 21:20:52,875 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 424 states to 326 states and 435 transitions. [2020-11-29 21:20:52,875 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2020-11-29 21:20:52,875 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-11-29 21:20:52,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 326 states and 435 transitions. [2020-11-29 21:20:52,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:52,876 INFO L691 BuchiCegarLoop]: Abstraction has 326 states and 435 transitions. [2020-11-29 21:20:52,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states and 435 transitions. [2020-11-29 21:20:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-11-29 21:20:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-29 21:20:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-11-29 21:20:52,887 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-11-29 21:20:52,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:20:52,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 21:20:52,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-11-29 21:20:52,888 INFO L87 Difference]: Start difference. First operand 318 states and 425 transitions. Second operand 20 states. [2020-11-29 21:20:53,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:20:53,417 INFO L93 Difference]: Finished difference Result 462 states and 631 transitions. [2020-11-29 21:20:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 21:20:53,418 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 462 states and 631 transitions. [2020-11-29 21:20:53,423 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 21:20:53,430 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 462 states to 451 states and 614 transitions. [2020-11-29 21:20:53,430 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 204 [2020-11-29 21:20:53,431 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 204 [2020-11-29 21:20:53,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 451 states and 614 transitions. [2020-11-29 21:20:53,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:20:53,431 INFO L691 BuchiCegarLoop]: Abstraction has 451 states and 614 transitions. [2020-11-29 21:20:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states and 614 transitions. [2020-11-29 21:20:53,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 384. [2020-11-29 21:20:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-11-29 21:20:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-11-29 21:20:53,446 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-11-29 21:20:53,446 INFO L594 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-11-29 21:20:53,446 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 21:20:53,446 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 384 states and 515 transitions. [2020-11-29 21:20:53,449 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 21:20:53,449 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:20:53,449 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:20:53,450 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-11-29 21:20:53,451 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 21:20:53,451 INFO L794 eck$LassoCheckResult]: Stem: 25398#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 25375#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 25376#L27 call main_#t~ret9 := fibo(main_~x~0);< 25405#fiboENTRY ~n := #in~n; 25583#L8 assume !(~n < 1); 25507#L10 assume !(1 == ~n); 25494#L13 call #t~ret7 := fibo(~n - 1);< 25505#fiboENTRY ~n := #in~n; 25503#L8 assume !(~n < 1); 25501#L10 assume !(1 == ~n); 25497#L13 call #t~ret7 := fibo(~n - 1);< 25498#fiboENTRY ~n := #in~n; 25546#L8 assume !(~n < 1); 25532#L10 assume !(1 == ~n); 25522#L13 call #t~ret7 := fibo(~n - 1);< 25527#fiboENTRY ~n := #in~n; 25531#L8 assume !(~n < 1); 25526#L10 assume !(1 == ~n); 25518#L13 call #t~ret7 := fibo(~n - 1);< 25525#fiboENTRY ~n := #in~n; 25554#L8 assume !(~n < 1); 25552#L10 assume !(1 == ~n); 25534#L13 call #t~ret7 := fibo(~n - 1);< 25548#fiboENTRY ~n := #in~n; 25747#L8 assume !(~n < 1); 25746#L10 assume !(1 == ~n); 25392#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25635#fiboENTRY ~n := #in~n; 25742#L8 assume !(~n < 1); 25424#L10 assume 1 == ~n;#res := 1; 25425#fiboFINAL assume true; 25719#fiboEXIT >#35#return; 25390#L13-1 call #t~ret8 := fibo(~n - 2);< 25393#fiboENTRY ~n := #in~n; 25756#L8 assume ~n < 1;#res := 0; 25755#fiboFINAL assume true; 25754#fiboEXIT >#37#return; 25380#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 25753#fiboFINAL assume true; 25752#fiboEXIT >#35#return; 25378#L13-1 call #t~ret8 := fibo(~n - 2);< 25645#fiboENTRY ~n := #in~n; 25748#L8 assume !(~n < 1); 25672#L10 assume 1 == ~n;#res := 1; 25661#fiboFINAL assume true; 25642#fiboEXIT >#37#return; 25641#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 25634#fiboFINAL assume true; 25610#fiboEXIT >#35#return; 25379#L13-1 call #t~ret8 := fibo(~n - 2);< 25543#fiboENTRY ~n := #in~n; 25662#L8 assume !(~n < 1); 25660#L10 assume !(1 == ~n); 25630#L13 call #t~ret7 := fibo(~n - 1);< 25657#fiboENTRY ~n := #in~n; 25666#L8 assume !(~n < 1); 25758#L10 assume !(1 == ~n); 25453#L13 call #t~ret7 := fibo(~n - 1);< 25450#fiboENTRY ~n := #in~n; 25668#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25454#L13 [2020-11-29 21:20:53,451 INFO L796 eck$LassoCheckResult]: Loop: 25454#L13 call #t~ret7 := fibo(~n - 1);< 25450#fiboENTRY ~n := #in~n; 25668#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25454#L13 [2020-11-29 21:20:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:53,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1637456312, now seen corresponding path program 5 times [2020-11-29 21:20:53,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:53,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933998998] [2020-11-29 21:20:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:53,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-29 21:20:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:53,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:20:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:53,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 21:20:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:53,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 21:20:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:53,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 21:20:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:20:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-29 21:20:53,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933998998] [2020-11-29 21:20:53,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37574846] [2020-11-29 21:20:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/bin/uautomizer/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:20:53,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-29 21:20:53,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:20:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 21:20:53,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:20:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 179 proven. 18 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-11-29 21:20:53,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:20:53,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 24 [2020-11-29 21:20:53,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902910016] [2020-11-29 21:20:53,923 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 21:20:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:20:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 7 times [2020-11-29 21:20:53,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:20:53,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661026130] [2020-11-29 21:20:53,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:20:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:53,926 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:20:53,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:20:53,929 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:20:53,967 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:20:53,968 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:20:53,968 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:20:53,968 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:20:53,968 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 21:20:53,968 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:53,968 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:20:53,968 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:20:53,968 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2020-11-29 21:20:53,968 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:20:53,968 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:20:53,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:53,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:53,990 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:53,993 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:20:54,043 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:20:54,043 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:54,046 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:54,046 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:20:54,049 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 21:20:54,049 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:20:54,071 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 21:20:54,071 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:20:54,098 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 21:20:54,098 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 21:21:01,426 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 21:21:01,428 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 21:21:01,428 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 21:21:01,428 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 21:21:01,428 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 21:21:01,428 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 21:21:01,428 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 21:21:01,428 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 21:21:01,428 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 21:21:01,428 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration10_Loop [2020-11-29 21:21:01,429 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 21:21:01,429 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 21:21:01,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:21:01,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:21:01,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:21:01,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 21:21:01,499 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 21:21:01,499 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:21:01,501 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 [2020-11-29 21:21:01,502 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:21:01,502 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:21:01,503 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:21:01,503 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:21:01,503 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:21:01,503 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:21:01,503 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:21:01,511 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:21:01,534 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 [2020-11-29 21:21:01,535 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:21:01,535 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:21:01,535 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:21:01,536 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:21:01,536 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:21:01,536 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:21:01,536 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:21:01,537 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:21:01,559 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 [2020-11-29 21:21:01,560 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 21:21:01,560 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 21:21:01,560 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 21:21:01,560 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 21:21:01,560 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 21:21:01,561 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 21:21:01,561 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 21:21:01,563 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 21:21:01,566 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 21:21:01,566 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_c427802a-46cc-4efa-b22d-542f8b9297a9/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 [2020-11-29 21:21:01,569 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 21:21:01,569 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 21:21:01,569 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 21:21:01,569 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 21:21:01,588 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 21:21:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:21:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:21:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 21:21:01,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:21:01,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:01,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:01,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:01,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:21:01,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:21:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:21:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:21:01,830 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:21:01,830 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-11-29 21:21:01,907 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 406 states and 538 transitions. Complement of second has 18 states. [2020-11-29 21:21:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:21:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:21:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 21:21:01,908 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 73 letters. Loop has 4 letters. [2020-11-29 21:21:01,908 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:21:01,908 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:21:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:21:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:21:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 21:21:02,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:21:02,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:02,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:02,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:02,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:21:02,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:21:02,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:21:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:21:02,130 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:21:02,130 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-11-29 21:21:02,254 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 412 states and 544 transitions. Complement of second has 17 states. [2020-11-29 21:21:02,255 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 [2020-11-29 21:21:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:21:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 21:21:02,256 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 73 letters. Loop has 4 letters. [2020-11-29 21:21:02,256 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:21:02,256 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 21:21:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:21:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:21:02,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 21:21:02,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:21:02,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:02,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:02,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:02,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:21:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:21:02,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:21:02,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:21:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:21:02,463 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 21:21:02,463 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-11-29 21:21:02,569 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 507 states and 666 transitions. Complement of second has 27 states. [2020-11-29 21:21:02,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 21:21:02,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 21:21:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 21:21:02,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-11-29 21:21:02,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:21:02,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 77 letters. Loop has 4 letters. [2020-11-29 21:21:02,572 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:21:02,572 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 8 letters. [2020-11-29 21:21:02,572 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 21:21:02,572 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 507 states and 666 transitions. [2020-11-29 21:21:02,579 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 21:21:02,584 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 507 states to 388 states and 520 transitions. [2020-11-29 21:21:02,584 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2020-11-29 21:21:02,585 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 156 [2020-11-29 21:21:02,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 388 states and 520 transitions. [2020-11-29 21:21:02,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 21:21:02,585 INFO L691 BuchiCegarLoop]: Abstraction has 388 states and 520 transitions. [2020-11-29 21:21:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states and 520 transitions. [2020-11-29 21:21:02,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 384. [2020-11-29 21:21:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-11-29 21:21:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-11-29 21:21:02,597 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-11-29 21:21:02,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:21:02,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 21:21:02,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-11-29 21:21:02,598 INFO L87 Difference]: Start difference. First operand 384 states and 515 transitions. Second operand 24 states. [2020-11-29 21:21:03,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:21:03,197 INFO L93 Difference]: Finished difference Result 542 states and 774 transitions. [2020-11-29 21:21:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 21:21:03,198 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 542 states and 774 transitions. [2020-11-29 21:21:03,203 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 21:21:03,204 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 542 states to 0 states and 0 transitions. [2020-11-29 21:21:03,204 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 21:21:03,204 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 21:21:03,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 21:21:03,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 21:21:03,204 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:21:03,204 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:21:03,204 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:21:03,204 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-29 21:21:03,204 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 21:21:03,204 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 21:21:03,204 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 21:21:03,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 09:21:03 BoogieIcfgContainer [2020-11-29 21:21:03,210 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 21:21:03,211 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:21:03,211 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:21:03,211 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:21:03,212 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:20:16" (3/4) ... [2020-11-29 21:21:03,215 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 21:21:03,216 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:21:03,217 INFO L168 Benchmark]: Toolchain (without parser) took 46994.34 ms. Allocated memory was 98.6 MB in the beginning and 224.4 MB in the end (delta: 125.8 MB). Free memory was 70.0 MB in the beginning and 99.5 MB in the end (delta: -29.5 MB). Peak memory consumption was 95.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:21:03,217 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 98.6 MB. Free memory was 56.9 MB in the beginning and 56.8 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:21:03,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.29 ms. Allocated memory is still 98.6 MB. Free memory was 69.7 MB in the beginning and 77.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:21:03,220 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.93 ms. Allocated memory is still 98.6 MB. Free memory was 77.3 MB in the beginning and 76.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:21:03,220 INFO L168 Benchmark]: Boogie Preprocessor took 15.53 ms. Allocated memory is still 98.6 MB. Free memory was 76.2 MB in the beginning and 75.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:21:03,221 INFO L168 Benchmark]: RCFGBuilder took 298.30 ms. Allocated memory is still 98.6 MB. Free memory was 75.2 MB in the beginning and 64.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:21:03,221 INFO L168 Benchmark]: BuchiAutomizer took 46423.57 ms. Allocated memory was 98.6 MB in the beginning and 224.4 MB in the end (delta: 125.8 MB). Free memory was 63.8 MB in the beginning and 99.5 MB in the end (delta: -35.7 MB). Peak memory consumption was 91.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:21:03,221 INFO L168 Benchmark]: Witness Printer took 4.56 ms. Allocated memory is still 224.4 MB. Free memory is still 99.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:21:03,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 98.6 MB. Free memory was 56.9 MB in the beginning and 56.8 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 213.29 ms. Allocated memory is still 98.6 MB. Free memory was 69.7 MB in the beginning and 77.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.93 ms. Allocated memory is still 98.6 MB. Free memory was 77.3 MB in the beginning and 76.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.53 ms. Allocated memory is still 98.6 MB. Free memory was 76.2 MB in the beginning and 75.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 298.30 ms. Allocated memory is still 98.6 MB. Free memory was 75.2 MB in the beginning and 64.3 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 46423.57 ms. Allocated memory was 98.6 MB in the beginning and 224.4 MB in the end (delta: 125.8 MB). Free memory was 63.8 MB in the beginning and 99.5 MB in the end (delta: -35.7 MB). Peak memory consumption was 91.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.56 ms. Allocated memory is still 224.4 MB. Free memory is still 99.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 18 terminating modules (9 trivial, 3 deterministic, 6 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 9 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 46.3s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 34.3s. Construction of modules took 2.6s. Büchi inclusion checks took 8.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 17. Automata minimization 0.3s AutomataMinimizationTime, 17 MinimizatonAttempts, 453 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 736 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 6, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 407 SDtfs, 1132 SDslu, 735 SDs, 0 SdLazy, 2447 SolverSat, 772 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT8 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf91 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf93 smp79 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 14ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 19 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 9 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 26.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...