./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 7e40a98558d0111ea95f3ee60a44cc14c7768182 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 22:41:41,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:41:41,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:41:41,805 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:41:41,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:41:41,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:41:41,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:41:41,818 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:41:41,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:41:41,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:41:41,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:41:41,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:41:41,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:41:41,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:41:41,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:41:41,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:41:41,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:41:41,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:41:41,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:41:41,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:41:41,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:41:41,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:41:41,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:41:41,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:41:41,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:41:41,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:41:41,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:41:41,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:41:41,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:41:41,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:41:41,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:41:41,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:41:41,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:41:41,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:41:41,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:41:41,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:41:41,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:41:41,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:41:41,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:41:41,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:41:41,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:41:41,864 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-19 22:41:41,885 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:41:41,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:41:41,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:41:41,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:41:41,886 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:41:41,886 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-19 22:41:41,886 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-19 22:41:41,887 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-19 22:41:41,887 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-19 22:41:41,887 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-19 22:41:41,887 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-19 22:41:41,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:41:41,887 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 22:41:41,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 22:41:41,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:41:41,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 22:41:41,888 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:41:41,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-19 22:41:41,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-19 22:41:41,889 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-19 22:41:41,889 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 22:41:41,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:41:41,889 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-19 22:41:41,889 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:41:41,890 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-19 22:41:41,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:41:41,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:41:41,890 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-19 22:41:41,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:41:41,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:41:41,891 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-19 22:41:41,891 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-19 22:41:41,892 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 -> 7e40a98558d0111ea95f3ee60a44cc14c7768182 [2019-11-19 22:41:42,024 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:41:42,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:41:42,043 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:41:42,044 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:41:42,044 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:41:42,045 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci02.c [2019-11-19 22:41:42,109 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/data/5484c1cbf/ceb46fdae2274dff8310c46419207274/FLAGd8e67d722 [2019-11-19 22:41:42,489 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:41:42,490 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/sv-benchmarks/c/recursive/Fibonacci02.c [2019-11-19 22:41:42,495 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/data/5484c1cbf/ceb46fdae2274dff8310c46419207274/FLAGd8e67d722 [2019-11-19 22:41:42,921 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/data/5484c1cbf/ceb46fdae2274dff8310c46419207274 [2019-11-19 22:41:42,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:41:42,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:41:42,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:41:42,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:41:42,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:41:42,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:41:42" (1/1) ... [2019-11-19 22:41:42,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590320ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:42, skipping insertion in model container [2019-11-19 22:41:42,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:41:42" (1/1) ... [2019-11-19 22:41:42,942 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:41:42,959 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:41:43,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:41:43,139 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:41:43,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:41:43,241 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:41:43,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43 WrapperNode [2019-11-19 22:41:43,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:41:43,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:41:43,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:41:43,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:41:43,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... [2019-11-19 22:41:43,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... [2019-11-19 22:41:43,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:41:43,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:41:43,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:41:43,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:41:43,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... [2019-11-19 22:41:43,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... [2019-11-19 22:41:43,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... [2019-11-19 22:41:43,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... [2019-11-19 22:41:43,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... [2019-11-19 22:41:43,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... [2019-11-19 22:41:43,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... [2019-11-19 22:41:43,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:41:43,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:41:43,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:41:43,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:41:43,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:43,361 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-11-19 22:41:43,362 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-11-19 22:41:43,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:41:43,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:41:43,536 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:41:43,537 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-19 22:41:43,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:41:43 BoogieIcfgContainer [2019-11-19 22:41:43,538 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:41:43,538 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-19 22:41:43,539 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-19 22:41:43,542 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-19 22:41:43,543 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:41:43,543 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 10:41:42" (1/3) ... [2019-11-19 22:41:43,544 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@84ab189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 10:41:43, skipping insertion in model container [2019-11-19 22:41:43,545 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:41:43,545 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:41:43" (2/3) ... [2019-11-19 22:41:43,545 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@84ab189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 10:41:43, skipping insertion in model container [2019-11-19 22:41:43,545 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:41:43,546 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:41:43" (3/3) ... [2019-11-19 22:41:43,548 INFO L371 chiAutomizerObserver]: Analyzing ICFG Fibonacci02.c [2019-11-19 22:41:43,606 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-19 22:41:43,607 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-19 22:41:43,607 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-19 22:41:43,607 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:41:43,607 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:41:43,607 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-19 22:41:43,608 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:41:43,608 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-19 22:41:43,620 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2019-11-19 22:41:43,640 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-19 22:41:43,640 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:43,640 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:43,645 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-19 22:41:43,646 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-19 22:41:43,646 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-19 22:41:43,646 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2019-11-19 22:41:43,647 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-19 22:41:43,648 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:43,648 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:43,648 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-19 22:41:43,648 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-19 22:41:43,655 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 6#L27true call main_#t~ret2 := fibonacci(main_~x~0);< 16#fibonacciENTRYtrue [2019-11-19 22:41:43,655 INFO L796 eck$LassoCheckResult]: Loop: 16#fibonacciENTRYtrue ~n := #in~n; 14#L15true assume !(~n < 1); 8#L17true assume !(1 == ~n); 5#L20true call #t~ret0 := fibonacci(~n - 1);< 16#fibonacciENTRYtrue [2019-11-19 22:41:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1426, now seen corresponding path program 1 times [2019-11-19 22:41:43,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:43,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405556950] [2019-11-19 22:41:43,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:43,751 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:41:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:43,752 INFO L82 PathProgramCache]: Analyzing trace with hash 927640, now seen corresponding path program 1 times [2019-11-19 22:41:43,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:43,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504461818] [2019-11-19 22:41:43,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:43,767 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:41:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:43,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1316945065, now seen corresponding path program 1 times [2019-11-19 22:41:43,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:43,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048449394] [2019-11-19 22:41:43,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:43,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:43,782 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:41:43,905 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:43,906 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:43,906 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:43,906 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:43,906 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:41:43,906 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:43,907 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:43,907 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:43,907 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2019-11-19 22:41:43,914 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:43,915 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:43,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:43,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:43,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:43,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:43,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:44,052 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:44,053 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:44,059 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:44,064 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:44,065 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,071 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:44,071 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:44,074 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:44,075 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:44,091 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:44,094 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:44,094 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,098 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:44,099 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:44,102 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:44,102 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,114 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:44,114 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:44,143 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:41:44,143 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 [2019-11-19 22:41:44,192 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:41:44,193 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:44,193 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:44,193 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:44,194 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:44,194 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:41:44,194 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,194 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:44,194 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:44,194 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration1_Loop [2019-11-19 22:41:44,194 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:44,194 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:44,195 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:44,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:44,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:44,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:44,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:44,292 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:44,296 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:44,303 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 [2019-11-19 22:41:44,305 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:44,306 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:44,306 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:44,306 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:44,307 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:44,309 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:44,310 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,316 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:44,326 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 [2019-11-19 22:41:44,328 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:44,328 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:44,328 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:44,328 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:44,328 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:44,329 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:44,329 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:44,331 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,339 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 [2019-11-19 22:41:44,340 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:44,340 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:44,341 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:44,341 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:44,341 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:44,342 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:44,342 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:44,350 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,359 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 [2019-11-19 22:41:44,361 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:44,361 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:44,361 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:44,361 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:44,361 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:44,362 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:44,362 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:44,364 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:44,386 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 [2019-11-19 22:41:44,388 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:44,388 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:44,388 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:44,388 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:44,388 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:44,390 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:44,390 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 [2019-11-19 22:41:44,399 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:41:44,403 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-19 22:41:44,403 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:44,411 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:41:44,411 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:41:44,411 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:41:44,412 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2019-11-19 22:41:44,417 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:41:44,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:44,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:41:44,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:44,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:41:44,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:44,529 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 [2019-11-19 22:41:44,530 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states. Second operand 4 states. [2019-11-19 22:41:44,640 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states.. Second operand 4 states. Result 46 states and 58 transitions. Complement of second has 12 states. [2019-11-19 22:41:44,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 22:41:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-19 22:41:44,645 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-19 22:41:44,646 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:44,647 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-19 22:41:44,647 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:44,647 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-19 22:41:44,647 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:44,648 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 46 states and 58 transitions. [2019-11-19 22:41:44,653 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-19 22:41:44,659 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 46 states to 24 states and 33 transitions. [2019-11-19 22:41:44,660 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-19 22:41:44,660 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-19 22:41:44,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-19 22:41:44,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:44,662 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-19 22:41:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-19 22:41:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-19 22:41:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-19 22:41:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-19 22:41:44,687 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-19 22:41:44,687 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-19 22:41:44,687 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-19 22:41:44,688 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-19 22:41:44,689 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-19 22:41:44,689 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:44,689 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:44,690 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:44,690 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:44,691 INFO L794 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 120#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 128#fibonacciENTRY ~n := #in~n; 125#L15 assume !(~n < 1); 126#L17 assume !(1 == ~n); 118#L20 call #t~ret0 := fibonacci(~n - 1);< 119#fibonacciENTRY ~n := #in~n; 122#L15 assume ~n < 1;#res := 0; 123#fibonacciFINAL assume true; 121#fibonacciEXIT >#28#return; 116#L20-1 [2019-11-19 22:41:44,691 INFO L796 eck$LassoCheckResult]: Loop: 116#L20-1 call #t~ret1 := fibonacci(~n - 2);< 117#fibonacciENTRY ~n := #in~n; 133#L15 assume !(~n < 1); 131#L17 assume !(1 == ~n); 115#L20 call #t~ret0 := fibonacci(~n - 1);< 117#fibonacciENTRY ~n := #in~n; 133#L15 assume ~n < 1;#res := 0; 130#fibonacciFINAL assume true; 132#fibonacciEXIT >#28#return; 116#L20-1 [2019-11-19 22:41:44,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:44,691 INFO L82 PathProgramCache]: Analyzing trace with hash -940667652, now seen corresponding path program 1 times [2019-11-19 22:41:44,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:44,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800391692] [2019-11-19 22:41:44,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:44,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800391692] [2019-11-19 22:41:44,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674771479] [2019-11-19 22:41:44,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:44,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:41:44,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:44,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:44,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-19 22:41:44,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632184997] [2019-11-19 22:41:44,867 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:41:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:44,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1564066394, now seen corresponding path program 1 times [2019-11-19 22:41:44,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:44,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416995012] [2019-11-19 22:41:44,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 22:41:44,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416995012] [2019-11-19 22:41:44,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:41:44,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 22:41:44,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714802899] [2019-11-19 22:41:44,955 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-19 22:41:44,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:41:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 22:41:44,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-19 22:41:44,960 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-19 22:41:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:41:45,047 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-19 22:41:45,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 22:41:45,048 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-19 22:41:45,050 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-19 22:41:45,051 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-19 22:41:45,052 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-19 22:41:45,052 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-19 22:41:45,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-19 22:41:45,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:45,052 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-19 22:41:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-19 22:41:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-19 22:41:45,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-19 22:41:45,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-19 22:41:45,056 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-19 22:41:45,057 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-19 22:41:45,057 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-19 22:41:45,057 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-19 22:41:45,058 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-19 22:41:45,058 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:45,058 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:45,060 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:45,060 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-19 22:41:45,060 INFO L794 eck$LassoCheckResult]: Stem: 227#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 219#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 228#fibonacciENTRY ~n := #in~n; 225#L15 assume !(~n < 1); 226#L17 assume !(1 == ~n); 218#L20 call #t~ret0 := fibonacci(~n - 1);< 220#fibonacciENTRY ~n := #in~n; 223#L15 assume !(~n < 1); 224#L17 assume 1 == ~n;#res := 1; 229#fibonacciFINAL assume true; 235#fibonacciEXIT >#28#return; 216#L20-1 [2019-11-19 22:41:45,060 INFO L796 eck$LassoCheckResult]: Loop: 216#L20-1 call #t~ret1 := fibonacci(~n - 2);< 217#fibonacciENTRY ~n := #in~n; 236#L15 assume !(~n < 1); 232#L17 assume !(1 == ~n); 215#L20 call #t~ret0 := fibonacci(~n - 1);< 217#fibonacciENTRY ~n := #in~n; 236#L15 assume !(~n < 1); 232#L17 assume !(1 == ~n); 215#L20 call #t~ret0 := fibonacci(~n - 1);< 217#fibonacciENTRY ~n := #in~n; 236#L15 assume !(~n < 1); 232#L17 assume 1 == ~n;#res := 1; 233#fibonacciFINAL assume true; 234#fibonacciEXIT >#28#return; 216#L20-1 call #t~ret1 := fibonacci(~n - 2);< 217#fibonacciENTRY ~n := #in~n; 236#L15 assume ~n < 1;#res := 0; 237#fibonacciFINAL assume true; 221#fibonacciEXIT >#30#return; 222#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 230#fibonacciFINAL assume true; 231#fibonacciEXIT >#28#return; 216#L20-1 [2019-11-19 22:41:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash 904098378, now seen corresponding path program 1 times [2019-11-19 22:41:45,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:45,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308878013] [2019-11-19 22:41:45,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:45,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308878013] [2019-11-19 22:41:45,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494371011] [2019-11-19 22:41:45,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-19 22:41:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:41:45,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:41:45,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:45,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:45,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-19 22:41:45,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30329729] [2019-11-19 22:41:45,165 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:41:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash 476609746, now seen corresponding path program 1 times [2019-11-19 22:41:45,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:45,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905793512] [2019-11-19 22:41:45,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:45,195 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:41:45,495 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:45,495 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:45,495 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:45,496 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:45,496 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:41:45,496 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:45,496 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:45,496 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:45,496 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2019-11-19 22:41:45,496 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:45,497 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:45,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:45,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:45,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:45,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:45,581 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:45,581 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:45,600 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:45,600 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 [2019-11-19 22:41:45,605 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:45,605 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=1} Honda state: {fibonacci_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:45,621 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:45,621 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:45,629 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:45,629 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:45,636 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:45,636 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:45,659 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:41:45,659 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 [2019-11-19 22:41:46,734 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:41:46,736 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:46,736 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:46,736 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:46,737 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:46,737 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:41:46,737 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:46,737 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:46,737 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:46,737 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration3_Loop [2019-11-19 22:41:46,737 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:46,737 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:46,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:46,749 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:46,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:46,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-11-19 22:41:46,848 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:46,848 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:46,868 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 [2019-11-19 22:41:46,870 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:46,870 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:46,870 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:46,871 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:46,871 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:46,871 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:46,872 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:46,873 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:46,887 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 [2019-11-19 22:41:46,888 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:46,888 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:46,889 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:46,889 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:46,889 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:46,891 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:46,891 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:46,896 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:41:46,899 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:41:46,900 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_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:46,910 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:41:46,912 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:41:46,912 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:41:46,912 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-19 22:41:46,915 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:41:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:46,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:41:46,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 22:41:47,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-19 22:41:47,106 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 [2019-11-19 22:41:47,107 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 8 states. [2019-11-19 22:41:47,368 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 8 states. Result 134 states and 182 transitions. Complement of second has 36 states. [2019-11-19 22:41:47,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-19 22:41:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-19 22:41:47,370 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 11 letters. Loop has 22 letters. [2019-11-19 22:41:47,371 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:47,371 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 33 letters. Loop has 22 letters. [2019-11-19 22:41:47,372 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:47,372 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 11 letters. Loop has 44 letters. [2019-11-19 22:41:47,375 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:47,375 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-19 22:41:47,382 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-19 22:41:47,388 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-19 22:41:47,389 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-19 22:41:47,389 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-19 22:41:47,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-19 22:41:47,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:47,390 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-19 22:41:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-19 22:41:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-19 22:41:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-19 22:41:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-19 22:41:47,406 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-19 22:41:47,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:41:47,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 22:41:47,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:41:47,407 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-19 22:41:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:41:47,491 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-19 22:41:47,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 22:41:47,492 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-19 22:41:47,496 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-19 22:41:47,503 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-19 22:41:47,505 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-19 22:41:47,506 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-19 22:41:47,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-19 22:41:47,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:47,507 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-19 22:41:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-19 22:41:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-19 22:41:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-19 22:41:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-19 22:41:47,521 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-19 22:41:47,521 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-19 22:41:47,521 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-19 22:41:47,522 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-19 22:41:47,524 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-19 22:41:47,524 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:47,524 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:47,526 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:47,526 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-19 22:41:47,526 INFO L794 eck$LassoCheckResult]: Stem: 797#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 795#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 803#fibonacciENTRY ~n := #in~n; 844#L15 assume !(~n < 1); 843#L17 assume !(1 == ~n); 794#L20 call #t~ret0 := fibonacci(~n - 1);< 796#fibonacciENTRY ~n := #in~n; 800#L15 assume !(~n < 1); 802#L17 assume !(1 == ~n); 801#L20 call #t~ret0 := fibonacci(~n - 1);< 796#fibonacciENTRY ~n := #in~n; 800#L15 assume !(~n < 1); 802#L17 assume !(1 == ~n); 801#L20 call #t~ret0 := fibonacci(~n - 1);< 796#fibonacciENTRY ~n := #in~n; 810#L15 assume !(~n < 1); 842#L17 assume 1 == ~n;#res := 1; 841#fibonacciFINAL assume true; 840#fibonacciEXIT >#28#return; 813#L20-1 call #t~ret1 := fibonacci(~n - 2);< 838#fibonacciENTRY ~n := #in~n; 872#L15 assume ~n < 1;#res := 0; 871#fibonacciFINAL assume true; 870#fibonacciEXIT >#30#return; 869#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 866#fibonacciFINAL assume true; 863#fibonacciEXIT >#28#return; 791#L20-1 [2019-11-19 22:41:47,527 INFO L796 eck$LassoCheckResult]: Loop: 791#L20-1 call #t~ret1 := fibonacci(~n - 2);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume !(1 == ~n); 790#L20 call #t~ret0 := fibonacci(~n - 1);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume !(1 == ~n); 790#L20 call #t~ret0 := fibonacci(~n - 1);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume 1 == ~n;#res := 1; 860#fibonacciFINAL assume true; 861#fibonacciEXIT >#28#return; 791#L20-1 call #t~ret1 := fibonacci(~n - 2);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume !(1 == ~n); 790#L20 call #t~ret0 := fibonacci(~n - 1);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume !(~n < 1); 847#L17 assume 1 == ~n;#res := 1; 860#fibonacciFINAL assume true; 861#fibonacciEXIT >#28#return; 791#L20-1 call #t~ret1 := fibonacci(~n - 2);< 793#fibonacciENTRY ~n := #in~n; 845#L15 assume ~n < 1;#res := 0; 846#fibonacciFINAL assume true; 868#fibonacciEXIT >#30#return; 862#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 865#fibonacciFINAL assume true; 864#fibonacciEXIT >#30#return; 862#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 865#fibonacciFINAL assume true; 864#fibonacciEXIT >#28#return; 791#L20-1 [2019-11-19 22:41:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:47,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1397716613, now seen corresponding path program 1 times [2019-11-19 22:41:47,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:47,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151281602] [2019-11-19 22:41:47,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-19 22:41:47,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151281602] [2019-11-19 22:41:47,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856643225] [2019-11-19 22:41:47,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:41:47,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 22:41:47,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-19 22:41:47,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:47,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-19 22:41:47,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284084951] [2019-11-19 22:41:47,709 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:41:47,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:47,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1986955448, now seen corresponding path program 2 times [2019-11-19 22:41:47,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:47,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296839979] [2019-11-19 22:41:47,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-19 22:41:47,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296839979] [2019-11-19 22:41:47,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512971027] [2019-11-19 22:41:47,819 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:47,852 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:41:47,852 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:41:47,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 22:41:47,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-19 22:41:47,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:47,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-19 22:41:47,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718795761] [2019-11-19 22:41:47,886 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-19 22:41:47,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:41:47,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 22:41:47,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-19 22:41:47,886 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-19 22:41:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:41:48,083 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-19 22:41:48,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-19 22:41:48,083 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-19 22:41:48,087 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-19 22:41:48,090 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-19 22:41:48,090 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-19 22:41:48,091 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-19 22:41:48,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-19 22:41:48,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:48,092 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-19 22:41:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-19 22:41:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-19 22:41:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-19 22:41:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-19 22:41:48,103 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-19 22:41:48,104 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-19 22:41:48,104 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-19 22:41:48,104 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-19 22:41:48,106 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-19 22:41:48,106 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:48,106 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:48,108 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:48,108 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2019-11-19 22:41:48,108 INFO L794 eck$LassoCheckResult]: Stem: 1300#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 1301#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 1308#fibonacciENTRY ~n := #in~n; 1349#L15 assume !(~n < 1); 1313#L17 assume !(1 == ~n); 1298#L20 call #t~ret0 := fibonacci(~n - 1);< 1310#fibonacciENTRY ~n := #in~n; 1306#L15 assume !(~n < 1); 1307#L17 assume !(1 == ~n); 1297#L20 call #t~ret0 := fibonacci(~n - 1);< 1299#fibonacciENTRY ~n := #in~n; 1347#L15 assume !(~n < 1); 1345#L17 assume !(1 == ~n); 1340#L20 call #t~ret0 := fibonacci(~n - 1);< 1299#fibonacciENTRY ~n := #in~n; 1347#L15 assume !(~n < 1); 1345#L17 assume !(1 == ~n); 1340#L20 call #t~ret0 := fibonacci(~n - 1);< 1299#fibonacciENTRY ~n := #in~n; 1348#L15 assume !(~n < 1); 1346#L17 assume 1 == ~n;#res := 1; 1344#fibonacciFINAL assume true; 1343#fibonacciEXIT >#28#return; 1323#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1341#fibonacciENTRY ~n := #in~n; 1391#L15 assume ~n < 1;#res := 0; 1390#fibonacciFINAL assume true; 1389#fibonacciEXIT >#30#return; 1387#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1386#fibonacciFINAL assume true; 1382#fibonacciEXIT >#28#return; 1353#L20-1 [2019-11-19 22:41:48,109 INFO L796 eck$LassoCheckResult]: Loop: 1353#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume !(1 == ~n); 1356#L20 call #t~ret0 := fibonacci(~n - 1);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume !(1 == ~n); 1356#L20 call #t~ret0 := fibonacci(~n - 1);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume !(1 == ~n); 1356#L20 call #t~ret0 := fibonacci(~n - 1);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume 1 == ~n;#res := 1; 1312#fibonacciFINAL assume true; 1393#fibonacciEXIT >#28#return; 1294#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1296#fibonacciENTRY ~n := #in~n; 1350#L15 assume ~n < 1;#res := 0; 1351#fibonacciFINAL assume true; 1394#fibonacciEXIT >#30#return; 1377#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1392#fibonacciFINAL assume true; 1381#fibonacciEXIT >#28#return; 1353#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume !(1 == ~n); 1356#L20 call #t~ret0 := fibonacci(~n - 1);< 1352#fibonacciENTRY ~n := #in~n; 1357#L15 assume !(~n < 1); 1385#L17 assume 1 == ~n;#res := 1; 1312#fibonacciFINAL assume true; 1393#fibonacciEXIT >#28#return; 1294#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1296#fibonacciENTRY ~n := #in~n; 1350#L15 assume ~n < 1;#res := 0; 1351#fibonacciFINAL assume true; 1394#fibonacciEXIT >#30#return; 1377#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1392#fibonacciFINAL assume true; 1381#fibonacciEXIT >#30#return; 1379#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 1384#fibonacciFINAL assume true; 1378#fibonacciEXIT >#28#return; 1353#L20-1 [2019-11-19 22:41:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:48,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2008361138, now seen corresponding path program 2 times [2019-11-19 22:41:48,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:48,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057830705] [2019-11-19 22:41:48,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-19 22:41:48,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057830705] [2019-11-19 22:41:48,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965172686] [2019-11-19 22:41:48,242 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:41:48,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:41:48,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:41:48,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 22:41:48,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-19 22:41:48,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:48,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-19 22:41:48,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164173046] [2019-11-19 22:41:48,291 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:41:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1980387862, now seen corresponding path program 3 times [2019-11-19 22:41:48,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:48,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729953108] [2019-11-19 22:41:48,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-19 22:41:48,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729953108] [2019-11-19 22:41:48,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383008579] [2019-11-19 22:41:48,474 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:41:48,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-19 22:41:48,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:41:48,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 22:41:48,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-19 22:41:48,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:48,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2019-11-19 22:41:48,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337478644] [2019-11-19 22:41:48,555 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-19 22:41:48,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:41:48,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 22:41:48,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-19 22:41:48,555 INFO L87 Difference]: Start difference. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 14 states. [2019-11-19 22:41:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:41:48,858 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2019-11-19 22:41:48,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 22:41:48,859 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 127 states and 171 transitions. [2019-11-19 22:41:48,862 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-19 22:41:48,865 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 127 states to 125 states and 169 transitions. [2019-11-19 22:41:48,865 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 84 [2019-11-19 22:41:48,866 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2019-11-19 22:41:48,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 125 states and 169 transitions. [2019-11-19 22:41:48,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:48,866 INFO L688 BuchiCegarLoop]: Abstraction has 125 states and 169 transitions. [2019-11-19 22:41:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states and 169 transitions. [2019-11-19 22:41:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2019-11-19 22:41:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-19 22:41:48,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 169 transitions. [2019-11-19 22:41:48,896 INFO L711 BuchiCegarLoop]: Abstraction has 125 states and 169 transitions. [2019-11-19 22:41:48,896 INFO L591 BuchiCegarLoop]: Abstraction has 125 states and 169 transitions. [2019-11-19 22:41:48,897 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-19 22:41:48,897 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 125 states and 169 transitions. [2019-11-19 22:41:48,898 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-19 22:41:48,899 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:48,899 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:48,901 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:48,903 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-19 22:41:48,903 INFO L794 eck$LassoCheckResult]: Stem: 1935#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 1921#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 1936#fibonacciENTRY ~n := #in~n; 1933#L15 assume !(~n < 1); 1934#L17 assume !(1 == ~n); 1920#L20 call #t~ret0 := fibonacci(~n - 1);< 1922#fibonacciENTRY ~n := #in~n; 1940#L15 assume !(~n < 1); 1948#L17 assume !(1 == ~n); 1949#L20 call #t~ret0 := fibonacci(~n - 1);< 1990#fibonacciENTRY ~n := #in~n; 1989#L15 assume !(~n < 1); 1988#L17 assume !(1 == ~n); 1975#L20 call #t~ret0 := fibonacci(~n - 1);< 1981#fibonacciENTRY ~n := #in~n; 1987#L15 assume !(~n < 1); 1986#L17 assume !(1 == ~n); 1976#L20 call #t~ret0 := fibonacci(~n - 1);< 1981#fibonacciENTRY ~n := #in~n; 1987#L15 assume !(~n < 1); 1986#L17 assume !(1 == ~n); 1976#L20 call #t~ret0 := fibonacci(~n - 1);< 1981#fibonacciENTRY ~n := #in~n; 1985#L15 assume !(~n < 1); 1984#L17 assume 1 == ~n;#res := 1; 1982#fibonacciFINAL assume true; 1980#fibonacciEXIT >#28#return; 1955#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1977#fibonacciENTRY ~n := #in~n; 2028#L15 assume ~n < 1;#res := 0; 2026#fibonacciFINAL assume true; 2025#fibonacciEXIT >#30#return; 2024#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 2023#fibonacciFINAL assume true; 2017#fibonacciEXIT >#28#return; 1944#L20-1 [2019-11-19 22:41:48,903 INFO L796 eck$LassoCheckResult]: Loop: 1944#L20-1 call #t~ret1 := fibonacci(~n - 2);< 2021#fibonacciENTRY ~n := #in~n; 2040#L15 assume !(~n < 1); 1941#L17 assume !(1 == ~n); 1945#L20 call #t~ret0 := fibonacci(~n - 1);< 2021#fibonacciENTRY ~n := #in~n; 2040#L15 assume !(~n < 1); 1941#L17 assume !(1 == ~n); 1945#L20 call #t~ret0 := fibonacci(~n - 1);< 2021#fibonacciENTRY ~n := #in~n; 2040#L15 assume !(~n < 1); 1941#L17 assume 1 == ~n;#res := 1; 1947#fibonacciFINAL assume true; 2012#fibonacciEXIT >#28#return; 1917#L20-1 call #t~ret1 := fibonacci(~n - 2);< 1919#fibonacciENTRY ~n := #in~n; 2035#L15 assume ~n < 1;#res := 0; 2036#fibonacciFINAL assume true; 2030#fibonacciEXIT >#30#return; 2013#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 2027#fibonacciFINAL assume true; 2018#fibonacciEXIT >#28#return; 1944#L20-1 [2019-11-19 22:41:48,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:48,905 INFO L82 PathProgramCache]: Analyzing trace with hash 463907735, now seen corresponding path program 3 times [2019-11-19 22:41:48,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:48,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482080926] [2019-11-19 22:41:48,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-19 22:41:49,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482080926] [2019-11-19 22:41:49,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413009653] [2019-11-19 22:41:49,070 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:41:49,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-19 22:41:49,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:41:49,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 22:41:49,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-19 22:41:49,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:49,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-19 22:41:49,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231797444] [2019-11-19 22:41:49,128 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:41:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash 476609746, now seen corresponding path program 4 times [2019-11-19 22:41:49,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:49,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177777393] [2019-11-19 22:41:49,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:49,141 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:41:49,340 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:49,340 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:49,341 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:49,341 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:49,341 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:41:49,341 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:49,341 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:49,341 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:49,341 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2019-11-19 22:41:49,341 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:49,341 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:49,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:49,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:49,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:49,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:49,395 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:49,395 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:49,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:49,403 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:49,410 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:41:49,410 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:50,247 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:41:50,249 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:50,249 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:50,249 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:50,249 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:50,249 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:41:50,249 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:50,249 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:50,249 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:50,249 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration6_Loop [2019-11-19 22:41:50,249 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:50,249 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:50,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:50,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:50,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:50,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:50,300 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:50,300 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:50,305 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 [2019-11-19 22:41:50,307 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:50,307 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:50,308 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:50,308 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:50,308 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:50,310 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:50,310 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:50,312 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:41:50,314 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-19 22:41:50,314 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_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:50,317 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:41:50,317 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:41:50,317 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:41:50,318 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-19 22:41:50,319 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:41:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:50,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 22:41:50,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:50,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:50,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:50,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 22:41:50,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-19 22:41:50,514 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 [2019-11-19 22:41:50,514 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50 Second operand 8 states. [2019-11-19 22:41:50,740 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50. Second operand 8 states. Result 194 states and 261 transitions. Complement of second has 33 states. [2019-11-19 22:41:50,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:50,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-19 22:41:50,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-19 22:41:50,743 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 35 letters. Loop has 22 letters. [2019-11-19 22:41:50,743 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:50,743 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:41:50,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:50,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 22:41:50,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:50,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:50,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:50,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 22:41:50,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-19 22:41:50,914 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 [2019-11-19 22:41:50,914 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50 Second operand 8 states. [2019-11-19 22:41:51,101 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50. Second operand 8 states. Result 319 states and 430 transitions. Complement of second has 25 states. [2019-11-19 22:41:51,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-19 22:41:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-19 22:41:51,107 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 35 letters. Loop has 22 letters. [2019-11-19 22:41:51,107 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:51,107 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:41:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:51,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 22:41:51,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:51,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:51,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:51,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 22:41:51,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-19 22:41:51,293 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 [2019-11-19 22:41:51,293 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50 Second operand 8 states. [2019-11-19 22:41:51,525 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 125 states and 169 transitions. cyclomatic complexity: 50. Second operand 8 states. Result 1094 states and 1539 transitions. Complement of second has 130 states. [2019-11-19 22:41:51,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-19 22:41:51,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-19 22:41:51,527 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 35 letters. Loop has 22 letters. [2019-11-19 22:41:51,529 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:51,529 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 57 letters. Loop has 22 letters. [2019-11-19 22:41:51,531 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:51,531 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 35 letters. Loop has 44 letters. [2019-11-19 22:41:51,533 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:51,534 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1094 states and 1539 transitions. [2019-11-19 22:41:51,554 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-19 22:41:51,569 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1094 states to 618 states and 954 transitions. [2019-11-19 22:41:51,569 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 246 [2019-11-19 22:41:51,570 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 276 [2019-11-19 22:41:51,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 618 states and 954 transitions. [2019-11-19 22:41:51,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:51,571 INFO L688 BuchiCegarLoop]: Abstraction has 618 states and 954 transitions. [2019-11-19 22:41:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states and 954 transitions. [2019-11-19 22:41:51,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 494. [2019-11-19 22:41:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-19 22:41:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-19 22:41:51,625 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-19 22:41:51,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:41:51,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 22:41:51,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-19 22:41:51,626 INFO L87 Difference]: Start difference. First operand 494 states and 746 transitions. Second operand 16 states. [2019-11-19 22:41:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:41:51,942 INFO L93 Difference]: Finished difference Result 567 states and 846 transitions. [2019-11-19 22:41:51,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-19 22:41:51,943 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 567 states and 846 transitions. [2019-11-19 22:41:51,953 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-19 22:41:51,963 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 567 states to 561 states and 837 transitions. [2019-11-19 22:41:51,963 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 249 [2019-11-19 22:41:51,964 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 249 [2019-11-19 22:41:51,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 561 states and 837 transitions. [2019-11-19 22:41:51,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:51,964 INFO L688 BuchiCegarLoop]: Abstraction has 561 states and 837 transitions. [2019-11-19 22:41:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states and 837 transitions. [2019-11-19 22:41:51,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 534. [2019-11-19 22:41:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534 states. [2019-11-19 22:41:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 805 transitions. [2019-11-19 22:41:51,993 INFO L711 BuchiCegarLoop]: Abstraction has 534 states and 805 transitions. [2019-11-19 22:41:51,993 INFO L591 BuchiCegarLoop]: Abstraction has 534 states and 805 transitions. [2019-11-19 22:41:51,993 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-19 22:41:51,993 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 534 states and 805 transitions. [2019-11-19 22:41:51,997 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-19 22:41:51,997 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:51,998 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:52,001 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:52,001 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-19 22:41:52,002 INFO L794 eck$LassoCheckResult]: Stem: 5645#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 5646#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 5647#fibonacciENTRY ~n := #in~n; 5648#L15 assume !(~n < 1); 5711#L17 assume !(1 == ~n); 5707#L20 call #t~ret0 := fibonacci(~n - 1);< 5710#fibonacciENTRY ~n := #in~n; 5709#L15 assume !(~n < 1); 5708#L17 assume !(1 == ~n); 5703#L20 call #t~ret0 := fibonacci(~n - 1);< 5706#fibonacciENTRY ~n := #in~n; 5705#L15 assume !(~n < 1); 5704#L17 assume !(1 == ~n); 5699#L20 call #t~ret0 := fibonacci(~n - 1);< 5701#fibonacciENTRY ~n := #in~n; 5702#L15 assume !(~n < 1); 5698#L17 assume !(1 == ~n); 5652#L20 call #t~ret0 := fibonacci(~n - 1);< 5695#fibonacciENTRY ~n := #in~n; 5697#L15 assume !(~n < 1); 5700#L17 assume !(1 == ~n); 5651#L20 call #t~ret0 := fibonacci(~n - 1);< 5695#fibonacciENTRY ~n := #in~n; 5696#L15 assume !(~n < 1); 5650#L17 assume 1 == ~n;#res := 1; 5653#fibonacciFINAL assume true; 6047#fibonacciEXIT >#28#return; 5636#L20-1 call #t~ret1 := fibonacci(~n - 2);< 5899#fibonacciENTRY ~n := #in~n; 5935#L15 assume !(~n < 1); 5927#L17 assume !(1 == ~n); 5928#L20 call #t~ret0 := fibonacci(~n - 1);< 5937#fibonacciENTRY ~n := #in~n; 6049#L15 assume !(~n < 1); 5939#L17 assume !(1 == ~n); 5940#L20 call #t~ret0 := fibonacci(~n - 1);< 5957#fibonacciENTRY [2019-11-19 22:41:52,002 INFO L796 eck$LassoCheckResult]: Loop: 5957#fibonacciENTRY ~n := #in~n; 5970#L15 assume !(~n < 1); 5967#L17 assume !(1 == ~n); 5955#L20 call #t~ret0 := fibonacci(~n - 1);< 5957#fibonacciENTRY [2019-11-19 22:41:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:52,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2028848867, now seen corresponding path program 1 times [2019-11-19 22:41:52,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:52,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539330870] [2019-11-19 22:41:52,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 9 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:52,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539330870] [2019-11-19 22:41:52,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184048776] [2019-11-19 22:41:52,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:41:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:52,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 22:41:52,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 46 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-19 22:41:52,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:52,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 22 [2019-11-19 22:41:52,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345331393] [2019-11-19 22:41:52,321 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:41:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash 927640, now seen corresponding path program 2 times [2019-11-19 22:41:52,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:52,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849163860] [2019-11-19 22:41:52,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:52,324 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:41:52,350 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:52,350 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:52,350 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:52,350 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:52,350 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:41:52,350 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:52,350 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:52,350 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:52,350 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2019-11-19 22:41:52,350 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:52,350 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:52,351 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,406 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:52,406 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:52,409 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:52,409 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:52,412 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:52,412 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:52,416 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:52,416 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:52,418 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:52,418 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_~n=0} Honda state: {fibonacci_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:52,422 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:52,422 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:52,424 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:52,424 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:52,428 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:52,428 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:52,431 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:52,431 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:52,435 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:52,435 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:52,441 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:41:52,442 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:52,450 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:41:52,452 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:52,452 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:52,452 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:52,452 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:52,452 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:41:52,452 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:52,452 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:52,452 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:52,453 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration7_Loop [2019-11-19 22:41:52,453 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:52,453 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:52,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,458 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:52,511 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:52,512 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:52,515 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:52,517 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:52,517 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:52,517 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:52,517 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:52,517 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:52,517 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:52,517 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:52,518 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:52,523 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 [2019-11-19 22:41:52,524 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:52,524 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:52,524 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:52,524 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:52,524 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:52,525 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:52,525 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:52,526 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:52,532 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 [2019-11-19 22:41:52,533 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:52,534 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:52,534 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:52,534 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:52,534 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:52,534 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:52,534 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:52,535 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:52,539 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 [2019-11-19 22:41:52,540 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:52,540 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:52,540 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:52,540 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:52,540 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:52,541 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:52,541 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:52,542 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:52,548 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 [2019-11-19 22:41:52,549 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:52,549 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:52,550 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:52,550 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:52,550 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:52,550 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:52,551 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:52,552 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:41:52,554 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:41:52,555 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_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:52,558 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:41:52,558 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:41:52,558 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:41:52,558 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_#in~n) = 1*fibonacci_#in~n Supporting invariants [] [2019-11-19 22:41:52,559 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:41:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:52,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-19 22:41:52,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:52,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:41:52,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:52,653 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 [2019-11-19 22:41:52,653 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281 Second operand 5 states. [2019-11-19 22:41:52,718 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281. Second operand 5 states. Result 550 states and 821 transitions. Complement of second has 13 states. [2019-11-19 22:41:52,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-19 22:41:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-19 22:41:52,721 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-19 22:41:52,721 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:52,721 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:41:52,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:52,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-19 22:41:52,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:52,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:41:52,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:52,827 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 [2019-11-19 22:41:52,828 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281 Second operand 5 states. [2019-11-19 22:41:52,896 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281. Second operand 5 states. Result 550 states and 821 transitions. Complement of second has 13 states. [2019-11-19 22:41:52,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-19 22:41:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-19 22:41:52,898 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-19 22:41:52,898 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:52,898 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:41:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:52,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-19 22:41:52,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:53,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:41:53,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:53,025 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 [2019-11-19 22:41:53,025 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281 Second operand 5 states. [2019-11-19 22:41:53,119 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 534 states and 805 transitions. cyclomatic complexity: 281. Second operand 5 states. Result 701 states and 990 transitions. Complement of second has 14 states. [2019-11-19 22:41:53,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-19 22:41:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-19 22:41:53,122 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-19 22:41:53,124 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:53,124 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 40 letters. Loop has 4 letters. [2019-11-19 22:41:53,124 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:53,124 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 8 letters. [2019-11-19 22:41:53,125 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:53,125 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 701 states and 990 transitions. [2019-11-19 22:41:53,134 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-19 22:41:53,143 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 701 states to 588 states and 865 transitions. [2019-11-19 22:41:53,143 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2019-11-19 22:41:53,144 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 222 [2019-11-19 22:41:53,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 588 states and 865 transitions. [2019-11-19 22:41:53,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:53,148 INFO L688 BuchiCegarLoop]: Abstraction has 588 states and 865 transitions. [2019-11-19 22:41:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states and 865 transitions. [2019-11-19 22:41:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 558. [2019-11-19 22:41:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-11-19 22:41:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 829 transitions. [2019-11-19 22:41:53,173 INFO L711 BuchiCegarLoop]: Abstraction has 558 states and 829 transitions. [2019-11-19 22:41:53,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:41:53,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-19 22:41:53,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2019-11-19 22:41:53,174 INFO L87 Difference]: Start difference. First operand 558 states and 829 transitions. Second operand 22 states. [2019-11-19 22:41:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:41:53,553 INFO L93 Difference]: Finished difference Result 650 states and 972 transitions. [2019-11-19 22:41:53,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-19 22:41:53,553 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 972 transitions. [2019-11-19 22:41:53,562 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-19 22:41:53,572 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 635 states and 951 transitions. [2019-11-19 22:41:53,573 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 240 [2019-11-19 22:41:53,573 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 240 [2019-11-19 22:41:53,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 635 states and 951 transitions. [2019-11-19 22:41:53,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:53,574 INFO L688 BuchiCegarLoop]: Abstraction has 635 states and 951 transitions. [2019-11-19 22:41:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states and 951 transitions. [2019-11-19 22:41:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 590. [2019-11-19 22:41:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-19 22:41:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 881 transitions. [2019-11-19 22:41:53,595 INFO L711 BuchiCegarLoop]: Abstraction has 590 states and 881 transitions. [2019-11-19 22:41:53,595 INFO L591 BuchiCegarLoop]: Abstraction has 590 states and 881 transitions. [2019-11-19 22:41:53,595 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-19 22:41:53,595 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 590 states and 881 transitions. [2019-11-19 22:41:53,599 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-19 22:41:53,599 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:53,600 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:53,601 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [10, 10, 9, 8, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:53,601 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-19 22:41:53,601 INFO L794 eck$LassoCheckResult]: Stem: 9768#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 9769#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 9770#fibonacciENTRY ~n := #in~n; 9856#L15 assume !(~n < 1); 9855#L17 assume !(1 == ~n); 9831#L20 call #t~ret0 := fibonacci(~n - 1);< 9832#fibonacciENTRY ~n := #in~n; 9839#L15 assume !(~n < 1); 9836#L17 assume !(1 == ~n); 9834#L20 call #t~ret0 := fibonacci(~n - 1);< 9850#fibonacciENTRY ~n := #in~n; 9854#L15 assume !(~n < 1); 9853#L17 assume !(1 == ~n); 9845#L20 call #t~ret0 := fibonacci(~n - 1);< 9852#fibonacciENTRY ~n := #in~n; 9876#L15 assume !(~n < 1); 9874#L17 assume !(1 == ~n); 9841#L20 call #t~ret0 := fibonacci(~n - 1);< 9849#fibonacciENTRY ~n := #in~n; 9912#L15 assume !(~n < 1); 9910#L17 assume !(1 == ~n); 9866#L20 call #t~ret0 := fibonacci(~n - 1);< 9879#fibonacciENTRY ~n := #in~n; 9986#L15 assume !(~n < 1); 9985#L17 assume !(1 == ~n); 9863#L20 call #t~ret0 := fibonacci(~n - 1);< 9879#fibonacciENTRY ~n := #in~n; 10011#L15 assume !(~n < 1); 10068#L17 assume 1 == ~n;#res := 1; 10067#fibonacciFINAL assume true; 10066#fibonacciEXIT >#28#return; 9772#L20-1 call #t~ret1 := fibonacci(~n - 2);< 9984#fibonacciENTRY ~n := #in~n; 10248#L15 assume !(~n < 1); 10240#L17 assume !(1 == ~n); 10241#L20 call #t~ret0 := fibonacci(~n - 1);< 10250#fibonacciENTRY ~n := #in~n; 10267#L15 assume !(~n < 1); 10264#L17 assume !(1 == ~n); 9803#L20 call #t~ret0 := fibonacci(~n - 1);< 9805#fibonacciENTRY ~n := #in~n; 9806#L15 assume !(~n < 1); 10278#L17 assume !(1 == ~n); 9801#L20 [2019-11-19 22:41:53,601 INFO L796 eck$LassoCheckResult]: Loop: 9801#L20 call #t~ret0 := fibonacci(~n - 1);< 9805#fibonacciENTRY ~n := #in~n; 9806#L15 assume !(~n < 1); 10278#L17 assume !(1 == ~n); 9801#L20 [2019-11-19 22:41:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:53,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1567609232, now seen corresponding path program 2 times [2019-11-19 22:41:53,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:53,602 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87776112] [2019-11-19 22:41:53,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:53,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87776112] [2019-11-19 22:41:53,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106792540] [2019-11-19 22:41:53,937 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:41:53,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:41:53,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:41:53,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 22:41:53,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 75 proven. 78 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-19 22:41:54,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:54,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 26 [2019-11-19 22:41:54,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250004415] [2019-11-19 22:41:54,001 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:41:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1728010, now seen corresponding path program 3 times [2019-11-19 22:41:54,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:54,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894154118] [2019-11-19 22:41:54,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:54,004 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:41:54,048 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:54,048 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:54,048 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:54,048 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:54,048 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:41:54,048 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:54,048 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:54,049 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:54,049 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2019-11-19 22:41:54,049 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:54,049 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:54,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:54,052 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:54,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:54,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:54,126 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:54,126 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:54,132 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:54,132 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:54,135 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:54,136 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:54,139 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:54,139 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:54,142 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:54,142 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:54,145 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:54,146 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:54,148 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:54,148 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:54,154 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:54,154 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:54,162 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:41:54,162 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:41:55,032 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:41:55,034 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:55,034 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:55,034 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:55,034 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:55,034 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:41:55,034 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:55,034 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:55,034 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:55,034 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration8_Loop [2019-11-19 22:41:55,034 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:55,034 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:55,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:55,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:55,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:55,040 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:55,085 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:55,085 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:55,089 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-19 22:41:55,090 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:55,091 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:55,091 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:55,091 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:55,091 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:55,091 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:55,091 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:55,093 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:55,096 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 [2019-11-19 22:41:55,097 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:55,097 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:55,097 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:55,098 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:55,098 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:55,098 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:55,098 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:55,100 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:55,103 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 [2019-11-19 22:41:55,104 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:55,104 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:55,105 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:55,105 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:55,105 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:55,105 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:55,105 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:55,106 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:55,111 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 [2019-11-19 22:41:55,112 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:55,112 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:55,112 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:55,113 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:55,113 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:55,114 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:55,114 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:55,116 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:41:55,120 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-19 22:41:55,120 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_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:55,123 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:41:55,123 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:41:55,124 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:41:55,124 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-19 22:41:55,125 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:41:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:55,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 22:41:55,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:55,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:41:55,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:55,226 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 [2019-11-19 22:41:55,227 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 590 states and 881 transitions. cyclomatic complexity: 301 Second operand 6 states. [2019-11-19 22:41:55,317 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 590 states and 881 transitions. cyclomatic complexity: 301. Second operand 6 states. Result 608 states and 900 transitions. Complement of second has 18 states. [2019-11-19 22:41:55,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-19 22:41:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-19 22:41:55,319 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-19 22:41:55,319 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:55,319 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:41:55,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:55,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 22:41:55,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:55,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:41:55,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:55,437 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 [2019-11-19 22:41:55,437 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 590 states and 881 transitions. cyclomatic complexity: 301 Second operand 6 states. [2019-11-19 22:41:55,520 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 590 states and 881 transitions. cyclomatic complexity: 301. Second operand 6 states. Result 838 states and 1222 transitions. Complement of second has 22 states. [2019-11-19 22:41:55,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-19 22:41:55,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-19 22:41:55,521 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-19 22:41:55,521 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:55,521 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 47 letters. Loop has 4 letters. [2019-11-19 22:41:55,522 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:55,522 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 8 letters. [2019-11-19 22:41:55,522 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:55,522 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 838 states and 1222 transitions. [2019-11-19 22:41:55,532 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-19 22:41:55,544 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 838 states to 768 states and 1147 transitions. [2019-11-19 22:41:55,544 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 255 [2019-11-19 22:41:55,545 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 283 [2019-11-19 22:41:55,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 768 states and 1147 transitions. [2019-11-19 22:41:55,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:55,545 INFO L688 BuchiCegarLoop]: Abstraction has 768 states and 1147 transitions. [2019-11-19 22:41:55,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states and 1147 transitions. [2019-11-19 22:41:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 755. [2019-11-19 22:41:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2019-11-19 22:41:55,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1130 transitions. [2019-11-19 22:41:55,568 INFO L711 BuchiCegarLoop]: Abstraction has 755 states and 1130 transitions. [2019-11-19 22:41:55,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:41:55,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-19 22:41:55,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2019-11-19 22:41:55,569 INFO L87 Difference]: Start difference. First operand 755 states and 1130 transitions. Second operand 26 states. [2019-11-19 22:41:56,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:41:56,106 INFO L93 Difference]: Finished difference Result 855 states and 1274 transitions. [2019-11-19 22:41:56,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-19 22:41:56,106 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 855 states and 1274 transitions. [2019-11-19 22:41:56,116 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-19 22:41:56,129 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 855 states to 838 states and 1248 transitions. [2019-11-19 22:41:56,129 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 299 [2019-11-19 22:41:56,130 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 302 [2019-11-19 22:41:56,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 838 states and 1248 transitions. [2019-11-19 22:41:56,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:56,130 INFO L688 BuchiCegarLoop]: Abstraction has 838 states and 1248 transitions. [2019-11-19 22:41:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states and 1248 transitions. [2019-11-19 22:41:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 813. [2019-11-19 22:41:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2019-11-19 22:41:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1193 transitions. [2019-11-19 22:41:56,161 INFO L711 BuchiCegarLoop]: Abstraction has 813 states and 1193 transitions. [2019-11-19 22:41:56,161 INFO L591 BuchiCegarLoop]: Abstraction has 813 states and 1193 transitions. [2019-11-19 22:41:56,161 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-19 22:41:56,161 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 813 states and 1193 transitions. [2019-11-19 22:41:56,167 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-19 22:41:56,167 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:56,167 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:56,169 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 10, 9, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:56,170 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-19 22:41:56,171 INFO L794 eck$LassoCheckResult]: Stem: 13937#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 13938#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 13947#fibonacciENTRY ~n := #in~n; 14064#L15 assume !(~n < 1); 14060#L17 assume !(1 == ~n); 14042#L20 call #t~ret0 := fibonacci(~n - 1);< 14053#fibonacciENTRY ~n := #in~n; 14423#L15 assume !(~n < 1); 14342#L17 assume !(1 == ~n); 14044#L20 call #t~ret0 := fibonacci(~n - 1);< 14045#fibonacciENTRY ~n := #in~n; 14147#L15 assume !(~n < 1); 14146#L17 assume !(1 == ~n); 14143#L20 call #t~ret0 := fibonacci(~n - 1);< 14145#fibonacciENTRY ~n := #in~n; 14268#L15 assume !(~n < 1); 14266#L17 assume !(1 == ~n); 14258#L20 call #t~ret0 := fibonacci(~n - 1);< 14265#fibonacciENTRY ~n := #in~n; 14263#L15 assume !(~n < 1); 14261#L17 assume !(1 == ~n); 14163#L20 call #t~ret0 := fibonacci(~n - 1);< 14259#fibonacciENTRY ~n := #in~n; 14348#L15 assume !(~n < 1); 14347#L17 assume !(1 == ~n); 14276#L20 call #t~ret0 := fibonacci(~n - 1);< 14345#fibonacciENTRY ~n := #in~n; 14372#L15 assume !(~n < 1); 14371#L17 assume !(1 == ~n); 14277#L20 call #t~ret0 := fibonacci(~n - 1);< 14370#fibonacciENTRY ~n := #in~n; 14427#L15 assume !(~n < 1); 14426#L17 assume 1 == ~n;#res := 1; 14425#fibonacciFINAL assume true; 14424#fibonacciEXIT >#28#return; 14414#L20-1 call #t~ret1 := fibonacci(~n - 2);< 14417#fibonacciENTRY ~n := #in~n; 14420#L15 assume ~n < 1;#res := 0; 14418#fibonacciFINAL assume true; 14413#fibonacciEXIT >#30#return; 14411#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 14410#fibonacciFINAL assume true; 14344#fibonacciEXIT >#28#return; 14270#L20-1 call #t~ret1 := fibonacci(~n - 2);< 14281#fibonacciENTRY ~n := #in~n; 14361#L15 assume !(~n < 1); 14368#L17 assume !(1 == ~n); 14048#L20 call #t~ret0 := fibonacci(~n - 1);< 14359#fibonacciENTRY ~n := #in~n; 14393#L15 assume !(~n < 1); 14392#L17 assume !(1 == ~n); 14029#L20 call #t~ret0 := fibonacci(~n - 1);< 14035#fibonacciENTRY ~n := #in~n; 14098#L15 assume !(~n < 1); 14097#L17 assume !(1 == ~n); 14032#L20 [2019-11-19 22:41:56,171 INFO L796 eck$LassoCheckResult]: Loop: 14032#L20 call #t~ret0 := fibonacci(~n - 1);< 14035#fibonacciENTRY ~n := #in~n; 14098#L15 assume !(~n < 1); 14097#L17 assume !(1 == ~n); 14032#L20 [2019-11-19 22:41:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:56,171 INFO L82 PathProgramCache]: Analyzing trace with hash 439095810, now seen corresponding path program 4 times [2019-11-19 22:41:56,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:56,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024651057] [2019-11-19 22:41:56,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Exception during sending of exit command (exit): Broken pipe [2019-11-19 22:41:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 205 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-19 22:41:56,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024651057] [2019-11-19 22:41:56,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596389543] [2019-11-19 22:41:56,529 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:41:56,571 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 22:41:56,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:41:56,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 22:41:56,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 95 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-19 22:41:56,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:56,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 28 [2019-11-19 22:41:56,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536002771] [2019-11-19 22:41:56,605 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:41:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:56,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1728010, now seen corresponding path program 4 times [2019-11-19 22:41:56,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:56,606 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724778471] [2019-11-19 22:41:56,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:56,609 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:41:56,647 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:56,647 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:56,647 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:56,647 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:56,648 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:41:56,648 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:56,648 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:56,648 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:56,648 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2019-11-19 22:41:56,648 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:56,648 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:56,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:56,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:56,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:56,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:56,724 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:56,724 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:56,729 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:56,729 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:56,732 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:56,732 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:56,738 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:56,738 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:56,742 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:56,742 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:56,751 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:56,751 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:56,758 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:56,758 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret1=0} Honda state: {fibonacci_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:41:56,768 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:56,768 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:56,779 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:41:56,779 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:57,766 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:41:57,768 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:57,768 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:57,768 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:57,768 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:57,768 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:41:57,768 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:57,768 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:57,768 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:57,769 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration9_Loop [2019-11-19 22:41:57,769 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:57,769 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:57,769 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:57,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:57,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:57,797 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:57,836 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:57,836 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:57,839 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 [2019-11-19 22:41:57,840 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:57,840 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:57,840 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:57,840 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:57,840 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:57,841 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:57,841 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:57,842 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:57,845 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 [2019-11-19 22:41:57,846 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:57,846 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:57,847 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:57,847 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:57,847 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:57,847 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:57,847 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:57,848 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:57,852 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 [2019-11-19 22:41:57,853 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:41:57,853 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:41:57,853 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:41:57,853 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:41:57,853 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:41:57,854 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:41:57,854 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:41:57,858 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:41:57,865 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:41:57,865 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_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:41:57,868 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:41:57,869 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:41:57,869 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:41:57,869 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-19 22:41:57,870 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:41:57,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:57,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-19 22:41:57,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:57,973 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:57,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:57,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:41:57,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:58,031 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 [2019-11-19 22:41:58,031 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393 Second operand 6 states. [2019-11-19 22:41:58,108 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393. Second operand 6 states. Result 838 states and 1219 transitions. Complement of second has 18 states. [2019-11-19 22:41:58,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-19 22:41:58,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-19 22:41:58,109 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-19 22:41:58,109 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:58,109 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:41:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:58,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-19 22:41:58,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:58,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:58,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:58,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:41:58,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:58,256 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 [2019-11-19 22:41:58,256 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393 Second operand 6 states. [2019-11-19 22:41:58,366 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393. Second operand 6 states. Result 1019 states and 1430 transitions. Complement of second has 22 states. [2019-11-19 22:41:58,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-19 22:41:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-19 22:41:58,368 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-19 22:41:58,368 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:58,368 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:41:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:58,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-19 22:41:58,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:58,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:58,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:41:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:58,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:41:58,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:58,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:41:58,506 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 [2019-11-19 22:41:58,506 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393 Second operand 6 states. [2019-11-19 22:41:58,567 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 813 states and 1193 transitions. cyclomatic complexity: 393. Second operand 6 states. Result 1102 states and 1565 transitions. Complement of second has 27 states. [2019-11-19 22:41:58,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-19 22:41:58,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-19 22:41:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-19 22:41:58,568 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-19 22:41:58,569 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:58,569 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 59 letters. Loop has 4 letters. [2019-11-19 22:41:58,569 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:58,569 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 8 letters. [2019-11-19 22:41:58,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:41:58,570 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1102 states and 1565 transitions. [2019-11-19 22:41:58,580 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-19 22:41:58,590 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1102 states to 813 states and 1193 transitions. [2019-11-19 22:41:58,590 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-19 22:41:58,591 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 278 [2019-11-19 22:41:58,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 813 states and 1193 transitions. [2019-11-19 22:41:58,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:58,591 INFO L688 BuchiCegarLoop]: Abstraction has 813 states and 1193 transitions. [2019-11-19 22:41:58,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states and 1193 transitions. [2019-11-19 22:41:58,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2019-11-19 22:41:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2019-11-19 22:41:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1193 transitions. [2019-11-19 22:41:58,613 INFO L711 BuchiCegarLoop]: Abstraction has 813 states and 1193 transitions. [2019-11-19 22:41:58,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:41:58,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-19 22:41:58,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2019-11-19 22:41:58,614 INFO L87 Difference]: Start difference. First operand 813 states and 1193 transitions. Second operand 28 states. [2019-11-19 22:41:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:41:59,150 INFO L93 Difference]: Finished difference Result 387 states and 486 transitions. [2019-11-19 22:41:59,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-19 22:41:59,151 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 387 states and 486 transitions. [2019-11-19 22:41:59,154 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-19 22:41:59,157 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 387 states to 353 states and 450 transitions. [2019-11-19 22:41:59,157 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2019-11-19 22:41:59,158 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2019-11-19 22:41:59,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 353 states and 450 transitions. [2019-11-19 22:41:59,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:41:59,158 INFO L688 BuchiCegarLoop]: Abstraction has 353 states and 450 transitions. [2019-11-19 22:41:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states and 450 transitions. [2019-11-19 22:41:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 328. [2019-11-19 22:41:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2019-11-19 22:41:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 419 transitions. [2019-11-19 22:41:59,167 INFO L711 BuchiCegarLoop]: Abstraction has 328 states and 419 transitions. [2019-11-19 22:41:59,167 INFO L591 BuchiCegarLoop]: Abstraction has 328 states and 419 transitions. [2019-11-19 22:41:59,167 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-11-19 22:41:59,167 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 328 states and 419 transitions. [2019-11-19 22:41:59,169 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-19 22:41:59,169 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:41:59,169 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:41:59,170 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 11, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-19 22:41:59,170 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-19 22:41:59,170 INFO L794 eck$LassoCheckResult]: Stem: 19787#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 9; 19788#L27 call main_#t~ret2 := fibonacci(main_~x~0);< 19789#fibonacciENTRY ~n := #in~n; 19847#L15 assume !(~n < 1); 19846#L17 assume !(1 == ~n); 19842#L20 call #t~ret0 := fibonacci(~n - 1);< 19845#fibonacciENTRY ~n := #in~n; 19844#L15 assume !(~n < 1); 19843#L17 assume !(1 == ~n); 19838#L20 call #t~ret0 := fibonacci(~n - 1);< 19841#fibonacciENTRY ~n := #in~n; 19840#L15 assume !(~n < 1); 19839#L17 assume !(1 == ~n); 19834#L20 call #t~ret0 := fibonacci(~n - 1);< 19837#fibonacciENTRY ~n := #in~n; 19836#L15 assume !(~n < 1); 19835#L17 assume !(1 == ~n); 19830#L20 call #t~ret0 := fibonacci(~n - 1);< 19833#fibonacciENTRY ~n := #in~n; 19832#L15 assume !(~n < 1); 19831#L17 assume !(1 == ~n); 19826#L20 call #t~ret0 := fibonacci(~n - 1);< 19829#fibonacciENTRY ~n := #in~n; 19828#L15 assume !(~n < 1); 19827#L17 assume !(1 == ~n); 19820#L20 call #t~ret0 := fibonacci(~n - 1);< 19822#fibonacciENTRY ~n := #in~n; 19825#L15 assume !(~n < 1); 19824#L17 assume !(1 == ~n); 19819#L20 call #t~ret0 := fibonacci(~n - 1);< 19822#fibonacciENTRY ~n := #in~n; 19825#L15 assume !(~n < 1); 19824#L17 assume !(1 == ~n); 19819#L20 call #t~ret0 := fibonacci(~n - 1);< 19821#fibonacciENTRY ~n := #in~n; 20030#L15 assume !(~n < 1); 20029#L17 assume 1 == ~n;#res := 1; 20028#fibonacciFINAL assume true; 20025#fibonacciEXIT >#28#return; 20022#L20-1 call #t~ret1 := fibonacci(~n - 2);< 20024#fibonacciENTRY ~n := #in~n; 20039#L15 assume ~n < 1;#res := 0; 20036#fibonacciFINAL assume true; 20021#fibonacciEXIT >#30#return; 20020#L20-2 #res := #t~ret0 + #t~ret1;havoc #t~ret1;havoc #t~ret0; 20019#fibonacciFINAL assume true; 20013#fibonacciEXIT >#28#return; 19926#L20-1 call #t~ret1 := fibonacci(~n - 2);< 19929#fibonacciENTRY ~n := #in~n; 20016#L15 assume !(~n < 1); 20014#L17 assume !(1 == ~n); 20015#L20 call #t~ret0 := fibonacci(~n - 1);< 20052#fibonacciENTRY ~n := #in~n; 20063#L15 assume !(~n < 1); 20077#L17 assume !(1 == ~n); 19813#L20 call #t~ret0 := fibonacci(~n - 1);< 19817#fibonacciENTRY ~n := #in~n; 19818#L15 assume !(~n < 1); 20089#L17 assume !(1 == ~n); 19810#L20 [2019-11-19 22:41:59,171 INFO L796 eck$LassoCheckResult]: Loop: 19810#L20 call #t~ret0 := fibonacci(~n - 1);< 19817#fibonacciENTRY ~n := #in~n; 19818#L15 assume !(~n < 1); 20089#L17 assume !(1 == ~n); 19810#L20 [2019-11-19 22:41:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1106126005, now seen corresponding path program 5 times [2019-11-19 22:41:59,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:59,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836708881] [2019-11-19 22:41:59,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:41:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 195 proven. 65 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-19 22:41:59,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836708881] [2019-11-19 22:41:59,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21968752] [2019-11-19 22:41:59,509 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:41:59,547 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-19 22:41:59,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:41:59,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-19 22:41:59,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:41:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 142 proven. 11 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-19 22:41:59,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:41:59,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 25 [2019-11-19 22:41:59,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293468652] [2019-11-19 22:41:59,617 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-19 22:41:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:41:59,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1728010, now seen corresponding path program 5 times [2019-11-19 22:41:59,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:41:59,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865468536] [2019-11-19 22:41:59,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:41:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:41:59,621 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:41:59,671 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:41:59,671 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:41:59,671 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:41:59,671 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:41:59,671 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:41:59,672 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:59,672 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:41:59,672 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:41:59,672 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration10_Loop [2019-11-19 22:41:59,672 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:41:59,672 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:41:59,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:59,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:59,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:59,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:41:59,726 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:41:59,726 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:59,739 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:59,739 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:59,742 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:59,743 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#res=0} Honda state: {fibonacci_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:59,751 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:59,751 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:41:59,755 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:41:59,755 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibonacci_#t~ret0=0} Honda state: {fibonacci_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/bin/uautomizer/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-19 22:41:59,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:41:59,760 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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) [2019-11-19 22:41:59,772 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:41:59,772 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:42:09,150 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:42:09,151 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:42:09,152 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:42:09,152 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:42:09,152 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:42:09,152 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:42:09,152 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:42:09,152 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:42:09,152 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:42:09,152 INFO L133 ssoRankerPreferences]: Filename of dumped script: Fibonacci02.c_Iteration10_Loop [2019-11-19 22:42:09,152 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:42:09,152 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:42:09,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:42:09,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:42:09,156 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:42:09,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:42:09,194 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:42:09,195 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:42:09,197 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 [2019-11-19 22:42:09,199 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:42:09,199 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:42:09,199 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:42:09,199 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:42:09,199 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:42:09,199 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:42:09,200 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:42:09,201 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:42:09,204 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 [2019-11-19 22:42:09,205 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:42:09,205 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:42:09,205 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:42:09,205 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:42:09,206 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:42:09,206 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:42:09,206 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:42:09,207 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:42:09,211 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 [2019-11-19 22:42:09,212 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:42:09,212 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:42:09,212 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:42:09,212 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:42:09,212 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:42:09,213 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:42:09,213 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:42:09,215 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:42:09,217 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:42:09,217 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_c44b1d46-c0a9-4dfe-9b4e-24d8355f5a17/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 [2019-11-19 22:42:09,220 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:42:09,221 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:42:09,221 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:42:09,221 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibonacci_~n) = 1*fibonacci_~n Supporting invariants [] [2019-11-19 22:42:09,222 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:42:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:42:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:42:09,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-19 22:42:09,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:42:09,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:42:09,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:42:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:42:09,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:42:09,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:42:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:42:09,339 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 [2019-11-19 22:42:09,339 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95 Second operand 6 states. [2019-11-19 22:42:09,390 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95. Second operand 6 states. Result 350 states and 442 transitions. Complement of second has 18 states. [2019-11-19 22:42:09,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-19 22:42:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-19 22:42:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-19 22:42:09,391 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 59 letters. Loop has 4 letters. [2019-11-19 22:42:09,391 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:42:09,391 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:42:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:42:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:42:09,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-19 22:42:09,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:42:09,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:42:09,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:42:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:42:09,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:42:09,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:42:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:42:09,540 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 [2019-11-19 22:42:09,540 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95 Second operand 6 states. [2019-11-19 22:42:09,604 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95. Second operand 6 states. Result 356 states and 448 transitions. Complement of second has 17 states. [2019-11-19 22:42:09,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-19 22:42:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-19 22:42:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-19 22:42:09,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 59 letters. Loop has 4 letters. [2019-11-19 22:42:09,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:42:09,611 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:42:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:42:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:42:09,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-19 22:42:09,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:42:09,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:42:09,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:42:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:42:09,814 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:42:09,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:42:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:42:09,837 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 [2019-11-19 22:42:09,837 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95 Second operand 6 states. [2019-11-19 22:42:09,891 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 328 states and 419 transitions. cyclomatic complexity: 95. Second operand 6 states. Result 455 states and 575 transitions. Complement of second has 27 states. [2019-11-19 22:42:09,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-19 22:42:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-19 22:42:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-19 22:42:09,895 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 59 letters. Loop has 4 letters. [2019-11-19 22:42:09,895 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:42:09,895 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 63 letters. Loop has 4 letters. [2019-11-19 22:42:09,896 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:42:09,896 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 59 letters. Loop has 8 letters. [2019-11-19 22:42:09,896 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:42:09,896 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 455 states and 575 transitions. [2019-11-19 22:42:09,901 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2019-11-19 22:42:09,904 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 455 states to 336 states and 429 transitions. [2019-11-19 22:42:09,905 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 108 [2019-11-19 22:42:09,905 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 120 [2019-11-19 22:42:09,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 336 states and 429 transitions. [2019-11-19 22:42:09,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:42:09,905 INFO L688 BuchiCegarLoop]: Abstraction has 336 states and 429 transitions. [2019-11-19 22:42:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states and 429 transitions. [2019-11-19 22:42:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2019-11-19 22:42:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2019-11-19 22:42:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 419 transitions. [2019-11-19 22:42:09,915 INFO L711 BuchiCegarLoop]: Abstraction has 328 states and 419 transitions. [2019-11-19 22:42:09,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:42:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-19 22:42:09,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2019-11-19 22:42:09,916 INFO L87 Difference]: Start difference. First operand 328 states and 419 transitions. Second operand 25 states. [2019-11-19 22:42:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:42:10,437 INFO L93 Difference]: Finished difference Result 426 states and 559 transitions. [2019-11-19 22:42:10,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-19 22:42:10,437 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 426 states and 559 transitions. [2019-11-19 22:42:10,440 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-19 22:42:10,441 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 426 states to 0 states and 0 transitions. [2019-11-19 22:42:10,441 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-19 22:42:10,441 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-19 22:42:10,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-19 22:42:10,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-19 22:42:10,441 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:42:10,442 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:42:10,442 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:42:10,442 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-11-19 22:42:10,442 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-19 22:42:10,442 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-19 22:42:10,442 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-19 22:42:10,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 10:42:10 BoogieIcfgContainer [2019-11-19 22:42:10,448 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-19 22:42:10,449 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:42:10,449 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:42:10,449 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:42:10,450 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:41:43" (3/4) ... [2019-11-19 22:42:10,454 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-19 22:42:10,454 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:42:10,458 INFO L168 Benchmark]: Toolchain (without parser) took 27530.59 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 278.9 MB). Free memory was 951.4 MB in the beginning and 936.4 MB in the end (delta: 15.1 MB). Peak memory consumption was 294.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:42:10,459 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:42:10,459 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -170.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-19 22:42:10,459 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:42:10,460 INFO L168 Benchmark]: Boogie Preprocessor took 16.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:42:10,460 INFO L168 Benchmark]: RCFGBuilder took 250.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:42:10,461 INFO L168 Benchmark]: BuchiAutomizer took 26910.16 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 154.7 MB). Free memory was 1.1 GB in the beginning and 936.4 MB in the end (delta: 164.3 MB). Peak memory consumption was 319.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:42:10,461 INFO L168 Benchmark]: Witness Printer took 5.14 ms. Allocated memory is still 1.3 GB. Free memory is still 936.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:42:10,463 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 316.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.3 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -170.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 250.65 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 26910.16 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 154.7 MB). Free memory was 1.1 GB in the beginning and 936.4 MB in the end (delta: 164.3 MB). Peak memory consumption was 319.0 MB. Max. memory is 11.5 GB. * Witness Printer took 5.14 ms. Allocated memory is still 1.3 GB. Free memory is still 936.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 16 terminating modules (9 trivial, 3 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 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. 9 modules have a trivial ranking function, the largest among these consists of 28 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 26.8s and 11 iterations. TraceHistogramMax:13. Analysis of lassos took 18.9s. Construction of modules took 2.3s. Büchi inclusion checks took 4.8s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 328 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 813 states and ocurred in iteration 8. Nontrivial modules had stage [2, 1, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 20/46 HoareTripleCheckerStatistics: 324 SDtfs, 913 SDslu, 818 SDs, 0 SdLazy, 2689 SolverSat, 728 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 SILT6 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf97 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq186 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 18ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 13.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...