./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-1.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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 c81a149fe338374de067d63dbdea0d00d3f8a8fa ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 18:26:19,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:26:19,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:26:19,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:26:19,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:26:19,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:26:19,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:26:19,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:26:19,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:26:19,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:26:19,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:26:19,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:26:19,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:26:19,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:26:19,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:26:19,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:26:19,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:26:19,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:26:19,925 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:26:19,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:26:19,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:26:19,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:26:19,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:26:19,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:26:19,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:26:19,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:26:19,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:26:19,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:26:19,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:26:19,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:26:19,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:26:19,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:26:19,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:26:19,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:26:19,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:26:19,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:26:19,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:26:19,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:26:19,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:26:19,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:26:19,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:26:19,968 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 18:26:20,008 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:26:20,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:26:20,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:26:20,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:26:20,011 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:26:20,011 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 18:26:20,012 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 18:26:20,012 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 18:26:20,012 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 18:26:20,012 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 18:26:20,013 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 18:26:20,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:26:20,014 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:26:20,014 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 18:26:20,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:26:20,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:26:20,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:26:20,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 18:26:20,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 18:26:20,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 18:26:20,016 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:26:20,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:26:20,016 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 18:26:20,017 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:26:20,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 18:26:20,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:26:20,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:26:20,018 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 18:26:20,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:26:20,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:26:20,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:26:20,019 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 18:26:20,020 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 18:26:20,020 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_8e79290e-ecff-4c49-802a-a21da03001bf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c81a149fe338374de067d63dbdea0d00d3f8a8fa [2020-11-29 18:26:20,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:26:20,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:26:20,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:26:20,383 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:26:20,384 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:26:20,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2020-11-29 18:26:20,449 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/data/47bb76322/e51f205e0af5400280b6a84c55353503/FLAGf254aa60d [2020-11-29 18:26:20,894 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:26:20,895 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2020-11-29 18:26:20,902 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/data/47bb76322/e51f205e0af5400280b6a84c55353503/FLAGf254aa60d [2020-11-29 18:26:20,917 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/data/47bb76322/e51f205e0af5400280b6a84c55353503 [2020-11-29 18:26:20,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:26:20,921 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:26:20,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:26:20,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:26:20,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:26:20,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:26:20" (1/1) ... [2020-11-29 18:26:20,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ebd2abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:20, skipping insertion in model container [2020-11-29 18:26:20,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:26:20" (1/1) ... [2020-11-29 18:26:20,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:26:20,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:26:21,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:26:21,135 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:26:21,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:26:21,165 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:26:21,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21 WrapperNode [2020-11-29 18:26:21,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:26:21,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:26:21,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:26:21,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:26:21,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... [2020-11-29 18:26:21,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... [2020-11-29 18:26:21,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:26:21,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:26:21,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:26:21,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:26:21,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... [2020-11-29 18:26:21,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... [2020-11-29 18:26:21,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... [2020-11-29 18:26:21,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... [2020-11-29 18:26:21,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... [2020-11-29 18:26:21,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... [2020-11-29 18:26:21,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... [2020-11-29 18:26:21,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:26:21,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:26:21,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:26:21,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:26:21,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:21,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:26:21,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:26:21,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:26:21,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:26:21,292 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-11-29 18:26:21,292 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-11-29 18:26:21,496 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:26:21,496 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 18:26:21,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:21 BoogieIcfgContainer [2020-11-29 18:26:21,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:26:21,499 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 18:26:21,500 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 18:26:21,511 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 18:26:21,526 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:26:21,527 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 06:26:20" (1/3) ... [2020-11-29 18:26:21,528 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3bb64e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:26:21, skipping insertion in model container [2020-11-29 18:26:21,528 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:26:21,528 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:21" (2/3) ... [2020-11-29 18:26:21,529 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3bb64e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:26:21, skipping insertion in model container [2020-11-29 18:26:21,529 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:26:21,529 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:21" (3/3) ... [2020-11-29 18:26:21,530 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_7-1.c [2020-11-29 18:26:21,587 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 18:26:21,588 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 18:26:21,588 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 18:26:21,588 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:26:21,588 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:26:21,588 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 18:26:21,588 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:26:21,588 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 18:26:21,601 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-11-29 18:26:21,623 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:26:21,624 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:21,624 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:21,630 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 18:26:21,631 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:26:21,631 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 18:26:21,631 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-11-29 18:26:21,633 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:26:21,634 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:21,634 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:21,634 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 18:26:21,634 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:26:21,641 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(11);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 := 7; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-11-29 18:26:21,642 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 18:26:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:21,648 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-11-29 18:26:21,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:21,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451626640] [2020-11-29 18:26:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:21,763 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:21,780 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:21,800 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:21,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-11-29 18:26:21,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:21,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436214518] [2020-11-29 18:26:21,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:21,809 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:21,814 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:21,816 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:21,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:21,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-11-29 18:26:21,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:21,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562774514] [2020-11-29 18:26:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:21,837 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:21,853 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:21,862 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:22,030 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:22,031 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:22,031 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:22,031 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:22,032 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:26:22,032 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:22,032 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:22,032 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:22,032 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2020-11-29 18:26:22,032 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:22,033 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:22,052 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 18:26:22,060 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 18:26:22,065 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 18:26:22,070 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 18:26:22,074 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:26:22,154 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:22,156 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:22,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:22,163 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:22,192 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:22,192 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:22,233 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:22,233 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:22,238 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:22,238 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:22,284 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:22,284 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:22,290 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:22,290 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:22,333 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:22,333 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:22,339 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:22,339 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_8e79290e-ecff-4c49-802a-a21da03001bf/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) [2020-11-29 18:26:22,384 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:22,384 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:22,433 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:26:22,434 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:22,507 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:26:22,509 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:22,509 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:22,510 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:22,510 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:22,510 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:26:22,510 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:22,510 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:22,510 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:22,510 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2020-11-29 18:26:22,510 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:22,511 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:22,512 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 18:26:22,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:26:22,530 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 18:26:22,535 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 18:26:22,539 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 18:26:22,614 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:22,618 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:22,627 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:22,631 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:22,631 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:22,631 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:22,632 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:22,632 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:22,634 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:22,634 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:22,637 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:22,683 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 18:26:22,685 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:22,685 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:22,685 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:22,685 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:22,685 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:22,688 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:22,689 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:22,695 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:22,734 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 18:26:22,736 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:22,736 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:22,736 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:22,736 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:22,737 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:22,738 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:22,738 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 18:26:22,743 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:22,790 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 18:26:22,791 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:22,792 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:22,792 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:22,792 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:22,792 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:22,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:22,793 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:22,796 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:22,837 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 18:26:22,839 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:22,839 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:22,840 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:22,840 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:22,840 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:22,841 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:22,841 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:22,846 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:26:22,852 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:26:22,852 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_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:22,861 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:26:22,862 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:26:22,862 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:26:22,863 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 18:26:22,900 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:26:22,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:22,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:26:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:23,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:23,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:23,049 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 18:26:23,064 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 18:26:23,066 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-11-29 18:26:23,200 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 18:26:23,201 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 18:26:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 18:26:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-29 18:26:23,205 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-11-29 18:26:23,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:23,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-11-29 18:26:23,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:23,207 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-29 18:26:23,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:23,208 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-11-29 18:26:23,213 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:26:23,220 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-11-29 18:26:23,221 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-29 18:26:23,221 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-11-29 18:26:23,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-11-29 18:26:23,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:23,223 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-11-29 18:26:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-11-29 18:26:23,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-11-29 18:26:23,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 18:26:23,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-11-29 18:26:23,266 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-11-29 18:26:23,266 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-11-29 18:26:23,266 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 18:26:23,266 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-11-29 18:26:23,269 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:26:23,269 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:23,270 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:23,270 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:23,271 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:23,271 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(11);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 := 7; 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 18:26:23,271 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-11-29 18:26:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-11-29 18:26:23,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:23,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825410196] [2020-11-29 18:26:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:23,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 18:26:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:26:23,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825410196] [2020-11-29 18:26:23,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:26:23,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:26:23,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412984180] [2020-11-29 18:26:23,419 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:26:23,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:23,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-11-29 18:26:23,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:23,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88548397] [2020-11-29 18:26:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:23,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 18:26:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:23,480 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 18:26:23,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88548397] [2020-11-29 18:26:23,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:26:23,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:26:23,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617719298] [2020-11-29 18:26:23,481 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:26:23,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:23,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 18:26:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:26:23,486 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-11-29 18:26:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:23,588 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-11-29 18:26:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:26:23,589 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-11-29 18:26:23,591 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:26:23,592 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-11-29 18:26:23,592 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-11-29 18:26:23,593 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-11-29 18:26:23,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-11-29 18:26:23,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:23,593 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 18:26:23,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-11-29 18:26:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 18:26:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 18:26:23,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-11-29 18:26:23,598 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 18:26:23,598 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 18:26:23,599 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 18:26:23,599 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-11-29 18:26:23,600 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:26:23,600 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:23,600 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:23,602 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:23,602 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-29 18:26:23,602 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(11);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 := 7; 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 18:26:23,602 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~ret7;havoc #t~ret8; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-11-29 18:26:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-11-29 18:26:23,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:23,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233740865] [2020-11-29 18:26:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:23,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 18:26:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:23,699 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 18:26:23,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233740865] [2020-11-29 18:26:23,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82431605] [2020-11-29 18:26:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:23,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:26:23,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:23,772 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 18:26:23,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:26:23,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 18:26:23,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129054004] [2020-11-29 18:26:23,773 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:26:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:23,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-11-29 18:26:23,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:23,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181810830] [2020-11-29 18:26:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:23,782 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:23,796 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:23,808 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:24,091 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:24,092 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:24,092 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:24,092 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:24,092 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:26:24,092 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:24,092 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:24,092 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:24,092 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2020-11-29 18:26:24,092 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:24,092 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:24,094 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 18:26:24,100 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 18:26:24,103 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 18:26:24,106 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 18:26:24,166 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:24,167 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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) [2020-11-29 18:26:24,187 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:24,188 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:24,195 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:24,195 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_8e79290e-ecff-4c49-802a-a21da03001bf/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) [2020-11-29 18:26:24,240 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:24,240 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:24,244 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:24,244 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:24,299 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:24,299 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:24,311 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:24,311 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:24,361 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:24,361 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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) [2020-11-29 18:26:24,419 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:26:24,419 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:25,353 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:26:25,355 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:25,355 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:25,355 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:25,355 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:25,356 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:26:25,356 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:25,356 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:25,356 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:25,356 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2020-11-29 18:26:25,356 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:25,356 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:25,357 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 18:26:25,360 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 18:26:25,363 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 18:26:25,383 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 18:26:25,461 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:25,461 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:25,465 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 18:26:25,467 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:25,467 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:25,467 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:25,467 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:25,468 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:25,468 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:25,469 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:25,470 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:25,524 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 18:26:25,527 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:25,527 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:25,527 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:25,527 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:25,527 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:25,528 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:25,529 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:25,530 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:25,579 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 18:26:25,582 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:25,583 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:25,583 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:25,583 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:25,583 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:25,588 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:25,589 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 18:26:25,593 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:26:25,598 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:26:25,598 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_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:25,602 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:26:25,602 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:26:25,603 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:26:25,603 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 18:26:25,639 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:26:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:25,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:26:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:25,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 18:26:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:25,986 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 18:26:25,987 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 18:26:25,988 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-11-29 18:26:26,424 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 18:26:26,428 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 18:26:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 18:26:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-11-29 18:26:26,433 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-11-29 18:26:26,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:26,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-11-29 18:26:26,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:26,438 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-11-29 18:26:26,439 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:26,442 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-11-29 18:26:26,456 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-11-29 18:26:26,464 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-11-29 18:26:26,464 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-11-29 18:26:26,464 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-11-29 18:26:26,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-11-29 18:26:26,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:26,465 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-11-29 18:26:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-11-29 18:26:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-11-29 18:26:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 18:26:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-11-29 18:26:26,482 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-11-29 18:26:26,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:26:26,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:26:26,484 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-11-29 18:26:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:26,606 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-11-29 18:26:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:26:26,608 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-11-29 18:26:26,612 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-11-29 18:26:26,617 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-11-29 18:26:26,617 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-11-29 18:26:26,618 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-11-29 18:26:26,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-11-29 18:26:26,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:26,619 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-11-29 18:26:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-11-29 18:26:26,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-11-29 18:26:26,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 18:26:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-11-29 18:26:26,634 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-11-29 18:26:26,634 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-11-29 18:26:26,634 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 18:26:26,634 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-11-29 18:26:26,637 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-11-29 18:26:26,637 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:26,637 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:26,639 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:26,639 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:26,639 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-11-29 18:26:26,639 INFO L796 eck$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 18:26:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:26,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-11-29 18:26:26,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:26,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587408977] [2020-11-29 18:26:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:26,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 18:26:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:26,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:26:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:26,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:26:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:26,777 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 18:26:26,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587408977] [2020-11-29 18:26:26,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56039323] [2020-11-29 18:26:26,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:26,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:26:26,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:26,876 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 18:26:26,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:26:26,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 18:26:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291892516] [2020-11-29 18:26:26,877 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:26:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-11-29 18:26:26,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:26,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941177416] [2020-11-29 18:26:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:26,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:26,886 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:26,888 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:27,045 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:27,045 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:27,045 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:27,045 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:27,045 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:26:27,046 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:27,046 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:27,046 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:27,046 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration4_Loop [2020-11-29 18:26:27,046 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:27,046 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:27,047 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 18:26:27,052 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 18:26:27,068 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 18:26:27,073 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 18:26:27,131 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:27,132 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:27,138 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:27,138 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 18:26:27,142 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:27,142 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_8e79290e-ecff-4c49-802a-a21da03001bf/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) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:27,174 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:27,175 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:27,200 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:26:27,200 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:28,356 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:26:28,358 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:28,358 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:28,359 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:28,359 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:28,359 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:26:28,359 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:28,359 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:28,359 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:28,359 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration4_Loop [2020-11-29 18:26:28,359 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:28,359 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:28,360 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 18:26:28,367 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 18:26:28,374 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 18:26:28,377 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 18:26:28,444 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:28,444 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:28,463 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 18:26:28,465 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:28,465 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:28,465 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:28,465 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:28,465 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:28,466 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:28,467 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:28,469 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:28,499 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 18:26:28,501 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:28,501 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:28,501 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:28,501 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:28,501 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:28,504 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:28,504 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:28,507 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:26:28,516 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:26:28,517 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:28,520 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:26:28,520 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:26:28,520 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:26:28,520 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:28,548 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:26:28,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:28,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:26:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:28,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:28,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:28,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:26:28,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:28,780 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 18:26:28,780 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 18:26:28,781 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-11-29 18:26:29,093 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 18:26:29,099 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 18:26:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:26:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-11-29 18:26:29,100 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 18:26:29,101 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:29,101 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:29,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:26:29,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:29,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:29,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:29,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:26:29,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:29,308 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 18:26:29,309 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 18:26:29,309 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-11-29 18:26:29,514 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 18:26:29,516 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 18:26:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:26:29,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-11-29 18:26:29,517 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 18:26:29,517 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:29,517 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:29,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:26:29,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:29,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:29,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:29,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:26:29,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:29,733 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 18:26:29,733 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 18:26:29,734 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-11-29 18:26:30,085 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 18:26:30,086 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 18:26:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:26:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-11-29 18:26:30,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 18:26:30,091 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:30,092 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-11-29 18:26:30,092 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:30,092 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-11-29 18:26:30,097 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:30,097 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-11-29 18:26:30,127 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-11-29 18:26:30,146 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-11-29 18:26:30,150 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-11-29 18:26:30,152 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-11-29 18:26:30,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-11-29 18:26:30,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:30,152 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-11-29 18:26:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-11-29 18:26:30,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-11-29 18:26:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-11-29 18:26:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-11-29 18:26:30,218 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-11-29 18:26:30,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:30,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:26:30,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:26:30,219 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-11-29 18:26:30,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:30,500 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-11-29 18:26:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:26:30,501 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-11-29 18:26:30,510 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:30,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-11-29 18:26:30,528 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-11-29 18:26:30,529 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-11-29 18:26:30,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-11-29 18:26:30,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:30,529 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-11-29 18:26:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-11-29 18:26:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-11-29 18:26:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-11-29 18:26:30,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-11-29 18:26:30,598 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-11-29 18:26:30,599 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-11-29 18:26:30,599 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 18:26:30,599 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-11-29 18:26:30,603 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:30,603 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:30,604 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:30,605 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:30,605 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:26:30,606 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(11);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 := 7; 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 18:26:30,606 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 18:26:30,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:30,607 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-11-29 18:26:30,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:30,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974460761] [2020-11-29 18:26:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:30,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-29 18:26:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:30,790 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 18:26:30,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974460761] [2020-11-29 18:26:30,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975531988] [2020-11-29 18:26:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:26:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:30,929 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 18:26:30,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:26:30,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 18:26:30,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711424795] [2020-11-29 18:26:30,930 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:26:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:30,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-11-29 18:26:30,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:30,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539282551] [2020-11-29 18:26:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:30,933 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:30,934 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:30,935 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:31,012 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:31,012 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:31,012 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:31,013 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:31,013 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:26:31,013 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:31,013 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:31,013 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:31,013 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2020-11-29 18:26:31,013 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:31,013 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:31,014 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 18:26:31,016 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 18:26:31,018 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 18:26:31,021 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 18:26:31,027 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 18:26:31,063 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:31,063 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:31,070 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:31,070 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:31,075 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:31,075 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_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:31,102 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:31,102 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 18:26:31,107 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:31,107 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_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:31,129 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:31,129 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 18:26:31,133 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:31,133 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_8e79290e-ecff-4c49-802a-a21da03001bf/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) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:31,156 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:31,156 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:31,182 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:26:31,183 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 18:26:31,251 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:26:31,253 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:31,253 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:31,253 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:31,253 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:31,253 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:26:31,253 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:31,253 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:31,253 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:31,253 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2020-11-29 18:26:31,254 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:31,254 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:31,254 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 18:26:31,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:26:31,273 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 18:26:31,276 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 18:26:31,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:26:31,319 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:31,319 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:31,327 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 18:26:31,328 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:31,328 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:31,328 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:31,328 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:31,329 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:31,329 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:31,329 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:31,330 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:31,353 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 18:26:31,354 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:31,354 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:31,354 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:31,354 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:31,354 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:31,355 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:31,355 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:31,365 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:31,388 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 18:26:31,389 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:31,389 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:31,389 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:31,389 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:31,389 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:31,390 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:31,390 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:31,391 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:31,415 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 18:26:31,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:31,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:31,417 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:31,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:31,417 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:31,417 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:31,417 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:31,418 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:31,440 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 18:26:31,441 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:31,442 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:31,442 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:31,442 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:31,442 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:31,443 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:31,443 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:31,445 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:26:31,448 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:26:31,449 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:31,451 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:26:31,451 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:26:31,451 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:26:31,451 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-11-29 18:26:31,472 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:26:31,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:31,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:26:31,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:31,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:31,617 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 18:26:31,617 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 18:26:31,617 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-11-29 18:26:31,725 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 18:26:31,728 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 18:26:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 18:26:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-11-29 18:26:31,729 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 18:26:31,729 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:31,729 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:26:31,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:31,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:31,889 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 18:26:31,889 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 18:26:31,889 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-11-29 18:26:31,976 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 18:26:31,977 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 18:26:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 18:26:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-11-29 18:26:31,978 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 18:26:31,978 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:31,978 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:31,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:32,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:26:32,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:32,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:32,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:32,146 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 18:26:32,147 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 18:26:32,147 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-11-29 18:26:32,305 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 18:26:32,309 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 18:26:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 18:26:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-11-29 18:26:32,311 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 18:26:32,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:32,312 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-11-29 18:26:32,314 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:32,314 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-11-29 18:26:32,315 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:32,315 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-11-29 18:26:32,329 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:32,342 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-11-29 18:26:32,342 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-11-29 18:26:32,343 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-11-29 18:26:32,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-11-29 18:26:32,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:32,343 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-11-29 18:26:32,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-11-29 18:26:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-11-29 18:26:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-11-29 18:26:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-11-29 18:26:32,380 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-11-29 18:26:32,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:26:32,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:26:32,383 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-11-29 18:26:32,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:32,632 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-11-29 18:26:32,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:26:32,633 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-11-29 18:26:32,641 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:32,651 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-11-29 18:26:32,651 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-11-29 18:26:32,652 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-11-29 18:26:32,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-11-29 18:26:32,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:32,655 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-11-29 18:26:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-11-29 18:26:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-11-29 18:26:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-11-29 18:26:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-11-29 18:26:32,681 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-11-29 18:26:32,681 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-11-29 18:26:32,681 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 18:26:32,681 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-11-29 18:26:32,685 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:32,686 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:32,686 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:32,688 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:32,688 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:26:32,689 INFO L794 eck$LassoCheckResult]: Stem: 7334#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7329#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 7325#L27 call main_#t~ret9 := fibo(main_~x~0);< 7347#fiboENTRY ~n := #in~n; 7348#L8 assume !(~n < 1); 7391#L10 assume !(1 == ~n); 7383#L13 call #t~ret7 := fibo(~n - 1);< 7384#fiboENTRY ~n := #in~n; 7393#L8 assume !(~n < 1); 7392#L10 assume !(1 == ~n); 7376#L13 call #t~ret7 := fibo(~n - 1);< 7388#fiboENTRY ~n := #in~n; 7387#L8 assume !(~n < 1); 7386#L10 assume !(1 == ~n); 7380#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7515#L8 assume !(~n < 1); 7426#L10 assume !(1 == ~n); 7379#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7493#L8 assume !(~n < 1); 7491#L10 assume 1 == ~n;#res := 1; 7487#fiboFINAL assume true; 7463#fiboEXIT >#35#return; 7448#L13-1 call #t~ret8 := fibo(~n - 2);< 7451#fiboENTRY ~n := #in~n; 7744#L8 assume !(~n < 1); 7741#L10 assume !(1 == ~n); 7351#L13 call #t~ret7 := fibo(~n - 1);< 7358#fiboENTRY ~n := #in~n; 7359#L8 assume !(~n < 1); 7794#L10 assume !(1 == ~n); 7363#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-11-29 18:26:32,689 INFO L796 eck$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 18:26:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-11-29 18:26:32,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:32,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492947492] [2020-11-29 18:26:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:32,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 18:26:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:32,895 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 18:26:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492947492] [2020-11-29 18:26:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496787787] [2020-11-29 18:26:32,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:32,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:26:32,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:26:32,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:26:32,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:33,021 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 18:26:33,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:26:33,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 18:26:33,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599350561] [2020-11-29 18:26:33,022 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:26:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-11-29 18:26:33,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:33,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591125969] [2020-11-29 18:26:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:33,025 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:33,026 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:33,027 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:33,097 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:33,098 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:33,098 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:33,098 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:33,098 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:26:33,098 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:33,098 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:33,098 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:33,098 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2020-11-29 18:26:33,098 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:33,098 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:33,099 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 18:26:33,102 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 18:26:33,106 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 18:26:33,115 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 18:26:33,175 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:33,176 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:33,183 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:33,183 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:33,185 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:33,185 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_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:33,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:33,211 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:33,219 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:33,219 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_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:33,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:33,242 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:33,269 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:26:33,269 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:40,476 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:26:40,478 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:40,479 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:40,479 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:40,479 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:40,479 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:26:40,479 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:40,479 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:40,479 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:40,479 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2020-11-29 18:26:40,479 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:40,479 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:40,480 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 18:26:40,484 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 18:26:40,487 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 18:26:40,495 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 18:26:40,544 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:40,544 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:40,550 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 18:26:40,551 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:40,551 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:40,551 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:40,551 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:40,551 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:40,552 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:40,552 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:40,553 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:40,576 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 18:26:40,577 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:40,577 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:40,577 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:40,577 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:40,578 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:40,578 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:40,578 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:40,583 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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) [2020-11-29 18:26:40,622 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 18:26:40,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:40,624 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:40,624 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:40,624 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:40,624 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:40,626 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:40,626 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:40,631 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:26:40,634 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:26:40,634 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_8e79290e-ecff-4c49-802a-a21da03001bf/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) [2020-11-29 18:26:40,638 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:26:40,638 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:26:40,638 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:26:40,638 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:40,674 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:26:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 18:26:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:40,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:40,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:40,849 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 18:26:40,850 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 18:26:40,850 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-11-29 18:26:40,932 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 18:26:40,933 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 18:26:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:40,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 18:26:40,934 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-11-29 18:26:40,934 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:40,934 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:41,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 18:26:41,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:41,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:41,095 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 18:26:41,096 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 18:26:41,096 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-11-29 18:26:41,278 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 18:26:41,279 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 18:26:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:41,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 18:26:41,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-11-29 18:26:41,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:41,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-11-29 18:26:41,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:41,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-11-29 18:26:41,281 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:41,281 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-11-29 18:26:41,292 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:41,305 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-11-29 18:26:41,305 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-11-29 18:26:41,306 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-11-29 18:26:41,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-11-29 18:26:41,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:41,306 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-11-29 18:26:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-11-29 18:26:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-11-29 18:26:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-11-29 18:26:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-11-29 18:26:41,334 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-11-29 18:26:41,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:41,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 18:26:41,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:26:41,335 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-11-29 18:26:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:41,659 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-11-29 18:26:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 18:26:41,660 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-11-29 18:26:41,672 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:41,685 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-11-29 18:26:41,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-11-29 18:26:41,686 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-11-29 18:26:41,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-11-29 18:26:41,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:41,687 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-11-29 18:26:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-11-29 18:26:41,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-11-29 18:26:41,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-11-29 18:26:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-11-29 18:26:41,722 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 18:26:41,722 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 18:26:41,722 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 18:26:41,723 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-11-29 18:26:41,729 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:41,729 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:41,730 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:41,733 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:41,733 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:26:41,734 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(11);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 := 7; 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~ret7;havoc #t~ret8; 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 18:26:41,734 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 18:26:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:41,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-11-29 18:26:41,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:41,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302681927] [2020-11-29 18:26:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:41,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 18:26:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:41,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:26:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:41,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:26:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:41,928 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 18:26:41,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302681927] [2020-11-29 18:26:41,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499881617] [2020-11-29 18:26:41,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:41,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:26:41,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:26:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 18:26:41,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:42,033 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 18:26:42,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:26:42,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 18:26:42,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853455074] [2020-11-29 18:26:42,034 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:26:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:42,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-11-29 18:26:42,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:42,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282645046] [2020-11-29 18:26:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:42,037 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:42,038 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:42,039 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:42,085 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:42,085 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:42,086 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:42,086 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:42,086 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:26:42,086 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:42,086 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:42,086 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:42,086 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2020-11-29 18:26:42,086 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:42,086 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:42,087 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 18:26:42,098 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:26:42,101 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:26:42,103 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 18:26:42,156 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:42,156 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:42,164 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:42,164 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:26:42,207 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:26:42,207 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:43,708 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:26:43,710 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:43,710 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:43,710 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:43,710 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:43,710 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:26:43,711 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:43,711 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:43,711 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:43,711 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2020-11-29 18:26:43,711 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:43,711 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:43,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:26:43,714 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 18:26:43,719 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 18:26:43,721 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 18:26:43,767 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:43,768 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:43,772 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 18:26:43,773 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:43,773 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:43,773 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:43,773 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:43,773 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:43,774 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:43,774 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:43,799 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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) [2020-11-29 18:26:43,836 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 18:26:43,838 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:43,838 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:43,839 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:43,839 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:43,839 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:43,839 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:43,840 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:43,841 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:43,880 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 18:26:43,881 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:43,881 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:43,881 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:43,882 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:43,882 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:43,882 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:43,882 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:43,883 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:43,907 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 18:26:43,908 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:43,908 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:43,908 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:43,908 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:43,908 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:43,911 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:43,911 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:43,913 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:26:43,916 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:26:43,916 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:43,918 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:26:43,918 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:26:43,918 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:26:43,918 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:26:43,938 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:26:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:44,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:26:44,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:44,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:44,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:44,114 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 18:26:44,114 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 18:26:44,114 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-11-29 18:26:44,207 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 18:26:44,209 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 18:26:44,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 18:26:44,210 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 18:26:44,211 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:44,211 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:44,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:26:44,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:44,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:44,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:44,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:44,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:44,446 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 18:26:44,447 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 18:26:44,447 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-11-29 18:26:44,570 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 18:26:44,574 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 18:26:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 18:26:44,575 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 18:26:44,576 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:44,576 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:44,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:26:44,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:44,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:44,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:44,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:44,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:44,775 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 18:26:44,775 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 18:26:44,775 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-11-29 18:26:44,874 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 18:26:44,875 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 18:26:44,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 18:26:44,876 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 18:26:44,876 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:44,877 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-11-29 18:26:44,877 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:44,877 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-11-29 18:26:44,878 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:44,878 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-11-29 18:26:44,890 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:44,900 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-11-29 18:26:44,900 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-11-29 18:26:44,902 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-11-29 18:26:44,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-11-29 18:26:44,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:44,903 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 18:26:44,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-11-29 18:26:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-11-29 18:26:44,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-11-29 18:26:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-11-29 18:26:44,928 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 18:26:44,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:26:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:26:44,929 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-11-29 18:26:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:45,326 INFO L93 Difference]: Finished difference Result 777 states and 1133 transitions. [2020-11-29 18:26:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 18:26:45,327 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1133 transitions. [2020-11-29 18:26:45,337 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:45,349 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1133 transitions. [2020-11-29 18:26:45,349 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-11-29 18:26:45,350 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-11-29 18:26:45,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1133 transitions. [2020-11-29 18:26:45,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:45,351 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1133 transitions. [2020-11-29 18:26:45,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1133 transitions. [2020-11-29 18:26:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 734. [2020-11-29 18:26:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-11-29 18:26:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1083 transitions. [2020-11-29 18:26:45,378 INFO L714 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-11-29 18:26:45,379 INFO L594 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-11-29 18:26:45,379 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 18:26:45,379 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 734 states and 1083 transitions. [2020-11-29 18:26:45,385 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:45,385 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:45,385 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:45,386 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 18:26:45,386 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:26:45,387 INFO L794 eck$LassoCheckResult]: Stem: 16564#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(11);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 := 7; 16556#L27 call main_#t~ret9 := fibo(main_~x~0);< 16583#fiboENTRY ~n := #in~n; 16648#L8 assume !(~n < 1); 16647#L10 assume !(1 == ~n); 16643#L13 call #t~ret7 := fibo(~n - 1);< 16646#fiboENTRY ~n := #in~n; 16645#L8 assume !(~n < 1); 16644#L10 assume !(1 == ~n); 16639#L13 call #t~ret7 := fibo(~n - 1);< 16642#fiboENTRY ~n := #in~n; 16641#L8 assume !(~n < 1); 16640#L10 assume !(1 == ~n); 16632#L13 call #t~ret7 := fibo(~n - 1);< 16638#fiboENTRY ~n := #in~n; 16636#L8 assume !(~n < 1); 16634#L10 assume !(1 == ~n); 16620#L13 call #t~ret7 := fibo(~n - 1);< 16625#fiboENTRY ~n := #in~n; 16630#L8 assume !(~n < 1); 16628#L10 assume !(1 == ~n); 16619#L13 call #t~ret7 := fibo(~n - 1);< 16625#fiboENTRY ~n := #in~n; 16631#L8 assume !(~n < 1); 16629#L10 assume 1 == ~n;#res := 1; 16626#fiboFINAL assume true; 16618#fiboEXIT >#35#return; 16611#L13-1 call #t~ret8 := fibo(~n - 2);< 16857#fiboENTRY ~n := #in~n; 16929#L8 assume !(~n < 1); 16610#L10 assume !(1 == ~n); 16612#L13 call #t~ret7 := fibo(~n - 1);< 16622#fiboENTRY ~n := #in~n; 16637#L8 assume !(~n < 1); 17175#L10 assume !(1 == ~n); 16571#L13 call #t~ret7 := fibo(~n - 1);< 17203#fiboENTRY ~n := #in~n; 17227#L8 assume !(~n < 1); 17224#L10 assume 1 == ~n;#res := 1; 17222#fiboFINAL assume true; 17202#fiboEXIT >#35#return; 16661#L13-1 call #t~ret8 := fibo(~n - 2);< 16662#fiboENTRY ~n := #in~n; 17206#L8 assume ~n < 1;#res := 0; 17205#fiboFINAL assume true; 17200#fiboEXIT >#37#return; 16660#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 16913#fiboFINAL assume true; 16892#fiboEXIT >#35#return; 16856#L13-1 call #t~ret8 := fibo(~n - 2);< 16889#fiboENTRY ~n := #in~n; 16971#L8 assume !(~n < 1); 16896#L10 assume !(1 == ~n); 16898#L13 call #t~ret7 := fibo(~n - 1);< 16925#fiboENTRY ~n := #in~n; 16975#L8 assume !(~n < 1); 17005#L10 assume !(1 == ~n); 16961#L13 call #t~ret7 := fibo(~n - 1);< 16964#fiboENTRY ~n := #in~n; 16989#L8 assume !(~n < 1); 16992#L10 assume !(1 == ~n); 16962#L13 [2020-11-29 18:26:45,387 INFO L796 eck$LassoCheckResult]: Loop: 16962#L13 call #t~ret7 := fibo(~n - 1);< 16964#fiboENTRY ~n := #in~n; 16989#L8 assume !(~n < 1); 16992#L10 assume !(1 == ~n); 16962#L13 [2020-11-29 18:26:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-11-29 18:26:45,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:45,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575690932] [2020-11-29 18:26:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:45,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 18:26:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:45,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-29 18:26:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:45,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:26:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:45,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:26:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:45,540 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 18:26:45,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575690932] [2020-11-29 18:26:45,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638176910] [2020-11-29 18:26:45,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:45,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 18:26:45,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:26:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:26:45,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:45,799 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 18:26:45,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:26:45,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-11-29 18:26:45,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109594391] [2020-11-29 18:26:45,801 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:26:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:45,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-11-29 18:26:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:45,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727752566] [2020-11-29 18:26:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:45,805 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:45,816 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:45,817 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:45,870 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:45,870 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:45,870 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:45,871 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:45,871 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:26:45,871 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:45,871 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:45,871 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:45,871 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2020-11-29 18:26:45,871 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:45,871 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:45,872 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 18:26:45,875 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 18:26:45,879 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 18:26:45,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:26:45,945 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:45,945 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:45,952 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:45,952 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:45,954 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:45,954 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:45,981 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:45,982 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:45,984 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:45,984 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_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:46,007 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:46,007 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:46,033 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:26:46,033 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:47,558 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:26:47,561 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:47,561 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:47,561 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:47,561 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:47,561 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:26:47,561 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:47,561 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:47,561 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:47,561 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2020-11-29 18:26:47,561 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:47,561 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:47,562 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 18:26:47,566 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 18:26:47,569 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 18:26:47,580 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 18:26:47,634 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:47,634 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:47,637 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 18:26:47,638 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:47,638 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:47,638 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:47,638 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:47,638 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:47,639 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:47,639 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:47,640 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:47,662 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 18:26:47,663 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:47,664 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:47,664 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:47,664 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:47,664 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:47,664 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:47,664 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:47,666 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:47,688 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 18:26:47,690 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:47,690 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:47,690 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:47,690 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:47,690 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:47,691 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:47,691 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:47,693 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:26:47,695 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:26:47,695 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_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:47,697 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:26:47,697 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:26:47,697 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:26:47,697 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:26:47,717 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:26:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:47,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 18:26:47,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:47,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:47,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:47,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:47,920 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 18:26:47,920 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 18:26:47,920 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-11-29 18:26:47,999 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362. Second operand 6 states. Result 753 states and 1103 transitions. Complement of second has 18 states. [2020-11-29 18:26:48,000 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 18:26:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 18:26:48,000 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 18:26:48,001 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:48,001 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:48,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 18:26:48,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:48,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:48,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:48,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:48,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:48,227 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 18:26:48,227 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 18:26:48,227 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-11-29 18:26:48,352 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362. Second operand 6 states. Result 938 states and 1322 transitions. Complement of second has 22 states. [2020-11-29 18:26:48,353 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 18:26:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 18:26:48,354 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 18:26:48,354 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:48,354 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:48,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 18:26:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:48,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:48,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:48,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:48,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:48,562 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 18:26:48,562 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 18:26:48,563 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-11-29 18:26:48,667 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362. Second operand 6 states. Result 981 states and 1403 transitions. Complement of second has 27 states. [2020-11-29 18:26:48,668 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 18:26:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 18:26:48,669 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 18:26:48,669 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:48,669 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-11-29 18:26:48,670 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:48,670 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-11-29 18:26:48,670 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:48,670 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 981 states and 1403 transitions. [2020-11-29 18:26:48,682 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:26:48,694 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 981 states to 734 states and 1083 transitions. [2020-11-29 18:26:48,694 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 229 [2020-11-29 18:26:48,695 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 265 [2020-11-29 18:26:48,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 734 states and 1083 transitions. [2020-11-29 18:26:48,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:48,695 INFO L691 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-11-29 18:26:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states and 1083 transitions. [2020-11-29 18:26:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-11-29 18:26:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-11-29 18:26:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1083 transitions. [2020-11-29 18:26:48,744 INFO L714 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-11-29 18:26:48,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:48,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 18:26:48,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-11-29 18:26:48,746 INFO L87 Difference]: Start difference. First operand 734 states and 1083 transitions. Second operand 23 states. [2020-11-29 18:26:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:49,434 INFO L93 Difference]: Finished difference Result 483 states and 671 transitions. [2020-11-29 18:26:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 18:26:49,435 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 483 states and 671 transitions. [2020-11-29 18:26:49,441 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:26:49,447 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 483 states to 402 states and 569 transitions. [2020-11-29 18:26:49,447 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 174 [2020-11-29 18:26:49,448 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 194 [2020-11-29 18:26:49,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 402 states and 569 transitions. [2020-11-29 18:26:49,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:49,451 INFO L691 BuchiCegarLoop]: Abstraction has 402 states and 569 transitions. [2020-11-29 18:26:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states and 569 transitions. [2020-11-29 18:26:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 319. [2020-11-29 18:26:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-11-29 18:26:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 440 transitions. [2020-11-29 18:26:49,464 INFO L714 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-11-29 18:26:49,464 INFO L594 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-11-29 18:26:49,464 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 18:26:49,465 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 319 states and 440 transitions. [2020-11-29 18:26:49,467 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:26:49,467 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:26:49,467 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:26:49,469 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 9, 8, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-11-29 18:26:49,469 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:26:49,471 INFO L794 eck$LassoCheckResult]: Stem: 22139#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(11);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 := 7; 22123#L27 call main_#t~ret9 := fibo(main_~x~0);< 22147#fiboENTRY ~n := #in~n; 22239#L8 assume !(~n < 1); 22236#L10 assume !(1 == ~n); 22229#L13 call #t~ret7 := fibo(~n - 1);< 22231#fiboENTRY ~n := #in~n; 22242#L8 assume !(~n < 1); 22238#L10 assume !(1 == ~n); 22233#L13 call #t~ret7 := fibo(~n - 1);< 22234#fiboENTRY ~n := #in~n; 22253#L8 assume !(~n < 1); 22251#L10 assume !(1 == ~n); 22248#L13 call #t~ret7 := fibo(~n - 1);< 22249#fiboENTRY ~n := #in~n; 22277#L8 assume !(~n < 1); 22271#L10 assume !(1 == ~n); 22244#L13 call #t~ret7 := fibo(~n - 1);< 22269#fiboENTRY ~n := #in~n; 22319#L8 assume !(~n < 1); 22318#L10 assume !(1 == ~n); 22260#L13 call #t~ret7 := fibo(~n - 1);< 22281#fiboENTRY ~n := #in~n; 22307#L8 assume !(~n < 1); 22306#L10 assume !(1 == ~n); 22264#L13 call #t~ret7 := fibo(~n - 1);< 22305#fiboENTRY ~n := #in~n; 22378#L8 assume !(~n < 1); 22377#L10 assume 1 == ~n;#res := 1; 22376#fiboFINAL assume true; 22373#fiboEXIT >#35#return; 22370#L13-1 call #t~ret8 := fibo(~n - 2);< 22372#fiboENTRY ~n := #in~n; 22380#L8 assume ~n < 1;#res := 0; 22379#fiboFINAL assume true; 22369#fiboEXIT >#37#return; 22368#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22365#fiboFINAL assume true; 22308#fiboEXIT >#35#return; 22297#L13-1 call #t~ret8 := fibo(~n - 2);< 22301#fiboENTRY ~n := #in~n; 22316#L8 assume !(~n < 1); 22314#L10 assume 1 == ~n;#res := 1; 22303#fiboFINAL assume true; 22296#fiboEXIT >#37#return; 22258#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22282#fiboFINAL assume true; 22243#fiboEXIT >#35#return; 22245#L13-1 call #t~ret8 := fibo(~n - 2);< 22266#fiboENTRY ~n := #in~n; 22315#L8 assume !(~n < 1); 22313#L10 assume !(1 == ~n); 22149#L13 call #t~ret7 := fibo(~n - 1);< 22142#fiboENTRY ~n := #in~n; 22285#L8 assume !(~n < 1); 22286#L10 assume !(1 == ~n); 22188#L13 call #t~ret7 := fibo(~n - 1);< 22189#fiboENTRY ~n := #in~n; 22388#L8 assume !(~n < 1); 22387#L10 assume !(1 == ~n); 22208#L13 [2020-11-29 18:26:49,471 INFO L796 eck$LassoCheckResult]: Loop: 22208#L13 call #t~ret7 := fibo(~n - 1);< 22189#fiboENTRY ~n := #in~n; 22388#L8 assume !(~n < 1); 22387#L10 assume !(1 == ~n); 22208#L13 [2020-11-29 18:26:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:49,472 INFO L82 PathProgramCache]: Analyzing trace with hash -686810473, now seen corresponding path program 4 times [2020-11-29 18:26:49,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:49,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811615473] [2020-11-29 18:26:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:49,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 18:26:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:49,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:26:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:49,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:26:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:49,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:26:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:49,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 18:26:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-29 18:26:49,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811615473] [2020-11-29 18:26:49,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914153468] [2020-11-29 18:26:49,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:49,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:26:49,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:26:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:26:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-29 18:26:49,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:26:49,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 18 [2020-11-29 18:26:49,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173531195] [2020-11-29 18:26:49,808 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:26:49,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:49,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-11-29 18:26:49,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:26:49,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148142305] [2020-11-29 18:26:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:26:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:49,811 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:26:49,813 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:26:49,814 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:26:49,866 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:49,866 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:49,866 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:49,866 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:49,866 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:26:49,866 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:49,866 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:49,866 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:49,866 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration9_Loop [2020-11-29 18:26:49,866 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:49,866 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:49,867 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 18:26:49,869 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 18:26:49,872 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 18:26:49,874 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 18:26:49,948 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:49,948 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:49,955 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:49,955 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:49,957 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:49,957 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:49,980 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:49,980 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:49,983 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:49,983 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_8e79290e-ecff-4c49-802a-a21da03001bf/bin/uautomizer/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:50,005 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:50,005 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:50,007 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:26:50,007 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_8e79290e-ecff-4c49-802a-a21da03001bf/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) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:50,030 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:26:50,030 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:50,056 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:26:50,056 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:26:57,236 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:26:57,238 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:26:57,238 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:26:57,238 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:26:57,238 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:26:57,238 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:26:57,238 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:26:57,238 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:26:57,238 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:26:57,238 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration9_Loop [2020-11-29 18:26:57,238 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:26:57,238 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:26:57,239 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 18:26:57,242 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 18:26:57,245 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 18:26:57,253 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 18:26:57,303 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:26:57,303 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:57,305 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 18:26:57,306 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:57,306 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:57,307 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:57,307 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:57,307 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:57,307 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:57,307 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:57,309 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:57,332 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 18:26:57,333 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:57,333 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:57,333 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:57,333 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:57,333 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:57,334 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:57,334 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:57,335 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:57,357 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 18:26:57,358 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:26:57,358 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:26:57,359 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:26:57,359 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:26:57,359 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:26:57,360 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:26:57,360 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:26:57,362 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:26:57,363 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:26:57,363 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_8e79290e-ecff-4c49-802a-a21da03001bf/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 18:26:57,365 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:26:57,365 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:26:57,366 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:26:57,366 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:26:57,386 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:26:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:57,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 18:26:57,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:57,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:57,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:57,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:57,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:57,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:57,568 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 18:26:57,568 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 18:26:57,569 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-11-29 18:26:57,643 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 338 states and 460 transitions. Complement of second has 18 states. [2020-11-29 18:26:57,644 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 18:26:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 18:26:57,644 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 61 letters. Loop has 4 letters. [2020-11-29 18:26:57,645 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:57,645 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:57,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:57,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 18:26:57,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:57,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:57,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:57,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:57,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:57,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:57,888 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 18:26:57,888 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 18:26:57,888 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-11-29 18:26:57,992 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 344 states and 466 transitions. Complement of second has 17 states. [2020-11-29 18:26:57,993 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 18:26:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 18:26:57,993 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 61 letters. Loop has 4 letters. [2020-11-29 18:26:57,994 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:57,994 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:26:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:26:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:58,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 18:26:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:58,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:58,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:58,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:58,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:26:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:26:58,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:26:58,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:26:58,177 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 18:26:58,177 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 18:26:58,178 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-11-29 18:26:58,271 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 421 states and 565 transitions. Complement of second has 27 states. [2020-11-29 18:26:58,272 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 18:26:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:26:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 18:26:58,273 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 61 letters. Loop has 4 letters. [2020-11-29 18:26:58,273 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:58,273 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 65 letters. Loop has 4 letters. [2020-11-29 18:26:58,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:58,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 61 letters. Loop has 8 letters. [2020-11-29 18:26:58,274 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:26:58,274 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 421 states and 565 transitions. [2020-11-29 18:26:58,279 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:26:58,285 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 421 states to 323 states and 445 transitions. [2020-11-29 18:26:58,285 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 124 [2020-11-29 18:26:58,286 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2020-11-29 18:26:58,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 323 states and 445 transitions. [2020-11-29 18:26:58,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:26:58,288 INFO L691 BuchiCegarLoop]: Abstraction has 323 states and 445 transitions. [2020-11-29 18:26:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states and 445 transitions. [2020-11-29 18:26:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2020-11-29 18:26:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-11-29 18:26:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 440 transitions. [2020-11-29 18:26:58,298 INFO L714 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-11-29 18:26:58,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:26:58,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 18:26:58,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-11-29 18:26:58,300 INFO L87 Difference]: Start difference. First operand 319 states and 440 transitions. Second operand 18 states. [2020-11-29 18:26:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:26:58,722 INFO L93 Difference]: Finished difference Result 288 states and 361 transitions. [2020-11-29 18:26:58,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 18:26:58,722 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 288 states and 361 transitions. [2020-11-29 18:26:58,725 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 18:26:58,726 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 288 states to 0 states and 0 transitions. [2020-11-29 18:26:58,726 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 18:26:58,726 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 18:26:58,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 18:26:58,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 18:26:58,726 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:26:58,726 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:26:58,726 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:26:58,726 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 18:26:58,726 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 18:26:58,727 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 18:26:58,727 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 18:26:58,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 06:26:58 BoogieIcfgContainer [2020-11-29 18:26:58,733 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 18:26:58,734 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:26:58,734 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:26:58,734 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:26:58,734 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:21" (3/4) ... [2020-11-29 18:26:58,738 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 18:26:58,738 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:26:58,740 INFO L168 Benchmark]: Toolchain (without parser) took 37817.98 ms. Allocated memory was 75.5 MB in the beginning and 220.2 MB in the end (delta: 144.7 MB). Free memory was 41.1 MB in the beginning and 174.9 MB in the end (delta: -133.8 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2020-11-29 18:26:58,740 INFO L168 Benchmark]: CDTParser took 0.80 ms. Allocated memory is still 75.5 MB. Free memory is still 57.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:26:58,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.93 ms. Allocated memory was 75.5 MB in the beginning and 96.5 MB in the end (delta: 21.0 MB). Free memory was 40.9 MB in the beginning and 72.3 MB in the end (delta: -31.4 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. [2020-11-29 18:26:58,741 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.14 ms. Allocated memory is still 96.5 MB. Free memory was 72.1 MB in the beginning and 70.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:26:58,741 INFO L168 Benchmark]: Boogie Preprocessor took 19.09 ms. Allocated memory is still 96.5 MB. Free memory was 70.8 MB in the beginning and 69.9 MB in the end (delta: 851.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:26:58,742 INFO L168 Benchmark]: RCFGBuilder took 279.26 ms. Allocated memory is still 96.5 MB. Free memory was 69.9 MB in the beginning and 58.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:26:58,743 INFO L168 Benchmark]: BuchiAutomizer took 37233.76 ms. Allocated memory was 96.5 MB in the beginning and 220.2 MB in the end (delta: 123.7 MB). Free memory was 58.7 MB in the beginning and 174.9 MB in the end (delta: -116.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. [2020-11-29 18:26:58,744 INFO L168 Benchmark]: Witness Printer took 4.83 ms. Allocated memory is still 220.2 MB. Free memory is still 174.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:26:58,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80 ms. Allocated memory is still 75.5 MB. Free memory is still 57.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 243.93 ms. Allocated memory was 75.5 MB in the beginning and 96.5 MB in the end (delta: 21.0 MB). Free memory was 40.9 MB in the beginning and 72.3 MB in the end (delta: -31.4 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.14 ms. Allocated memory is still 96.5 MB. Free memory was 72.1 MB in the beginning and 70.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.09 ms. Allocated memory is still 96.5 MB. Free memory was 70.8 MB in the beginning and 69.9 MB in the end (delta: 851.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 279.26 ms. Allocated memory is still 96.5 MB. Free memory was 69.9 MB in the beginning and 58.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 37233.76 ms. Allocated memory was 96.5 MB in the beginning and 220.2 MB in the end (delta: 123.7 MB). Free memory was 58.7 MB in the beginning and 174.9 MB in the end (delta: -116.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.83 ms. Allocated memory is still 220.2 MB. Free memory is still 174.9 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 16 terminating modules (8 trivial, 3 deterministic, 5 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. 8 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 37.1s and 10 iterations. TraceHistogramMax:13. Analysis of lassos took 26.7s. Construction of modules took 2.4s. Büchi inclusion checks took 7.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 397 StatesRemovedByMinimization, 12 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 734 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 5, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 353 SDtfs, 816 SDslu, 587 SDs, 0 SdLazy, 1984 SolverSat, 565 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf91 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 20.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...