./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/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 483e7d170ed0643447e075c470cba29c0e69d3cf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 18:15:20,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:15:20,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:15:20,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:15:20,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:15:20,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:15:20,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:15:20,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:15:20,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:15:20,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:15:20,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:15:20,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:15:20,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:15:20,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:15:20,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:15:20,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:15:20,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:15:20,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:15:20,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:15:20,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:15:20,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:15:20,270 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:15:20,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:15:20,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:15:20,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:15:20,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:15:20,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:15:20,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:15:20,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:15:20,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:15:20,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:15:20,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:15:20,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:15:20,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:15:20,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:15:20,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:15:20,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:15:20,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:15:20,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:15:20,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:15:20,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:15:20,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 18:15:20,346 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:15:20,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:15:20,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:15:20,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:15:20,349 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:15:20,349 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 18:15:20,349 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 18:15:20,350 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 18:15:20,350 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 18:15:20,350 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 18:15:20,351 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 18:15:20,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:15:20,352 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:15:20,352 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 18:15:20,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:15:20,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:15:20,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:15:20,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 18:15:20,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 18:15:20,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 18:15:20,354 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:15:20,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:15:20,355 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 18:15:20,355 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:15:20,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 18:15:20,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:15:20,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:15:20,356 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 18:15:20,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:15:20,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:15:20,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:15:20,359 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 18:15:20,360 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 18:15:20,360 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 483e7d170ed0643447e075c470cba29c0e69d3cf [2020-11-29 18:15:20,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:15:20,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:15:20,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:15:20,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:15:20,649 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:15:20,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_10-2.c [2020-11-29 18:15:20,739 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/data/f65ce1ad9/7a01c2ddade24987a2fe1e73b8e88f42/FLAGcc1dcc304 [2020-11-29 18:15:21,170 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:15:21,170 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2020-11-29 18:15:21,176 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/data/f65ce1ad9/7a01c2ddade24987a2fe1e73b8e88f42/FLAGcc1dcc304 [2020-11-29 18:15:21,548 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/data/f65ce1ad9/7a01c2ddade24987a2fe1e73b8e88f42 [2020-11-29 18:15:21,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:15:21,551 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:15:21,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:15:21,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:15:21,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:15:21,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e5ec952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21, skipping insertion in model container [2020-11-29 18:15:21,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:15:21,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:15:21,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:15:21,759 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:15:21,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:15:21,790 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:15:21,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21 WrapperNode [2020-11-29 18:15:21,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:15:21,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:15:21,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:15:21,793 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:15:21,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:15:21,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:15:21,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:15:21,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:15:21,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... [2020-11-29 18:15:21,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:15:21,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:15:21,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:15:21,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:15:21,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:21,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:15:21,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:15:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:15:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:15:21,908 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-11-29 18:15:21,908 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-11-29 18:15:22,122 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:15:22,122 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 18:15:22,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:15:22 BoogieIcfgContainer [2020-11-29 18:15:22,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:15:22,126 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 18:15:22,126 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 18:15:22,130 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 18:15:22,131 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:15:22,131 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 06:15:21" (1/3) ... [2020-11-29 18:15:22,135 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2d80074f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:15:22, skipping insertion in model container [2020-11-29 18:15:22,135 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:15:22,135 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:15:21" (2/3) ... [2020-11-29 18:15:22,136 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2d80074f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:15:22, skipping insertion in model container [2020-11-29 18:15:22,145 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:15:22,146 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:15:22" (3/3) ... [2020-11-29 18:15:22,147 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_10-2.c [2020-11-29 18:15:22,199 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 18:15:22,199 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 18:15:22,199 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 18:15:22,199 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:15:22,200 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:15:22,200 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 18:15:22,200 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:15:22,200 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 18:15:22,213 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-11-29 18:15:22,234 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:15:22,234 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:22,234 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:22,240 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 18:15:22,240 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:15:22,240 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 18:15:22,240 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-11-29 18:15:22,243 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:15:22,243 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:22,243 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:22,243 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 18:15:22,244 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:15:22,250 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-11-29 18:15:22,251 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-11-29 18:15:22,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:22,257 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-11-29 18:15:22,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:22,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974997793] [2020-11-29 18:15:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:22,406 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:22,447 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:22,483 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-11-29 18:15:22,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:22,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436179831] [2020-11-29 18:15:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:22,507 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:22,512 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:22,514 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:22,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-11-29 18:15:22,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:22,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130726753] [2020-11-29 18:15:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:22,537 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:22,553 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:22,558 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:22,695 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:22,695 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:22,696 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:22,696 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:22,696 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:15:22,696 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:22,696 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:22,696 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:22,697 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2020-11-29 18:15:22,697 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:22,697 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:22,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:22,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:22,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:22,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:22,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:22,833 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:22,834 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/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 [2020-11-29 18:15:22,839 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:22,839 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:22,850 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:22,850 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:22,875 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:22,875 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:22,877 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:22,877 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:22,919 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:22,920 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:22,923 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:22,923 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:22,961 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:22,961 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:22,964 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:22,964 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:23,000 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:23,000 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:23,034 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:15:23,035 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:23,068 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:15:23,069 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:23,069 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:23,069 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:23,070 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:23,070 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:15:23,070 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:23,070 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:23,070 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:23,070 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2020-11-29 18:15:23,070 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:23,070 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:23,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:23,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:23,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:23,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:23,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:23,172 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:23,176 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:15:23,184 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:23,188 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:23,189 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:23,189 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:23,189 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:23,189 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:23,192 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:23,192 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:23,195 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:23,230 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:23,232 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:23,232 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:23,232 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:23,232 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:23,232 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:23,233 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:23,233 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:23,243 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:23,268 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:23,269 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:23,269 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:23,270 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:23,270 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:23,270 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:23,271 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:23,271 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:23,272 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:23,302 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:23,303 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:23,303 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:23,304 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:23,304 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:23,304 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:23,304 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:23,304 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:23,312 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:23,335 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:23,336 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:23,337 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:23,337 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:23,337 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:23,337 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:23,338 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:23,338 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:23,364 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:15:23,370 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:15:23,370 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:15:23,381 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:15:23,381 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:15:23,381 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:15:23,382 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:23,417 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:15:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:15:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:23,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:23,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:23,547 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 18:15:23,548 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-11-29 18:15:23,747 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-11-29 18:15:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:23,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 18:15:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-29 18:15:23,753 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-11-29 18:15:23,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:23,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-11-29 18:15:23,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:23,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-29 18:15:23,756 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:23,756 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-11-29 18:15:23,765 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:15:23,771 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-11-29 18:15:23,772 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-29 18:15:23,772 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-11-29 18:15:23,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-11-29 18:15:23,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:23,773 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-11-29 18:15:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-11-29 18:15:23,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-11-29 18:15:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 18:15:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-11-29 18:15:23,798 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-11-29 18:15:23,798 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-11-29 18:15:23,798 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 18:15:23,798 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-11-29 18:15:23,799 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:15:23,799 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:23,799 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:23,800 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:23,800 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:23,801 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-11-29 18:15:23,801 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-11-29 18:15:23,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:23,801 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-11-29 18:15:23,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:23,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881333273] [2020-11-29 18:15:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:23,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 18:15:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:15:23,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881333273] [2020-11-29 18:15:23,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:15:23,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:15:23,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129565224] [2020-11-29 18:15:23,910 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:15:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:23,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-11-29 18:15:23,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:23,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144605569] [2020-11-29 18:15:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:23,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 18:15:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:15:23,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144605569] [2020-11-29 18:15:23,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:15:23,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:15:23,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553450207] [2020-11-29 18:15:23,999 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:15:24,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 18:15:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:15:24,005 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-11-29 18:15:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:24,106 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-11-29 18:15:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:15:24,107 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-11-29 18:15:24,109 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:15:24,110 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-11-29 18:15:24,110 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-11-29 18:15:24,111 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-11-29 18:15:24,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-11-29 18:15:24,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:24,111 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 18:15:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-11-29 18:15:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 18:15:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 18:15:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-11-29 18:15:24,116 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 18:15:24,116 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-11-29 18:15:24,116 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 18:15:24,116 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-11-29 18:15:24,117 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 18:15:24,117 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:24,117 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:24,118 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:24,119 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-29 18:15:24,119 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-11-29 18:15:24,119 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-11-29 18:15:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:24,120 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-11-29 18:15:24,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:24,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129779440] [2020-11-29 18:15:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:24,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:24,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 18:15:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:24,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129779440] [2020-11-29 18:15:24,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695564832] [2020-11-29 18:15:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:15:24,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:24,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:24,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 18:15:24,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270292575] [2020-11-29 18:15:24,289 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:15:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-11-29 18:15:24,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:24,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907266427] [2020-11-29 18:15:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:24,314 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:24,336 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:24,338 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:24,671 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:24,672 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:24,672 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:24,672 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:24,672 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:15:24,672 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:24,672 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:24,672 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:24,672 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2020-11-29 18:15:24,672 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:24,672 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:24,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:24,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:24,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:24,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:24,774 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:24,775 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:24,789 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:24,789 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:24,793 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:24,794 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:24,823 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:24,823 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:24,825 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:24,825 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:24,850 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:24,850 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:24,865 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:24,865 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:15:24,892 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:24,892 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:24,917 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:15:24,917 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:25,831 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:15:25,833 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:25,833 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:25,833 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:25,833 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:25,833 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:15:25,833 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:25,833 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:25,833 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:25,833 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2020-11-29 18:15:25,834 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:25,834 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:25,835 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:25,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:25,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:25,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:25,942 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:25,942 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:15:25,955 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:25,956 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:25,957 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:25,957 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:25,957 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:25,957 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:25,957 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:25,958 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:25,959 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:25,984 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:25,985 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:25,985 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:25,986 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:25,986 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:25,986 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:25,986 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:25,986 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:25,989 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/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 [2020-11-29 18:15:26,014 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:26,015 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:26,015 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:26,016 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:26,016 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:26,016 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:26,018 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:26,018 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:26,020 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:15:26,043 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:15:26,043 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:26,046 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:15:26,046 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:15:26,047 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:15:26,047 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:15:26,067 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:15:26,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:15:26,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:26,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 18:15:26,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:15:26,409 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-11-29 18:15:26,409 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-11-29 18:15:26,753 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-11-29 18:15:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 18:15:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-11-29 18:15:26,756 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-11-29 18:15:26,757 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:26,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-11-29 18:15:26,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:26,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-11-29 18:15:26,760 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:26,761 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-11-29 18:15:26,772 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-11-29 18:15:26,781 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-11-29 18:15:26,781 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-11-29 18:15:26,782 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-11-29 18:15:26,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-11-29 18:15:26,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:26,784 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-11-29 18:15:26,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-11-29 18:15:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-11-29 18:15:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 18:15:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-11-29 18:15:26,812 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-11-29 18:15:26,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:26,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:15:26,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:15:26,813 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-11-29 18:15:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:26,908 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-11-29 18:15:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:15:26,908 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-11-29 18:15:26,913 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-11-29 18:15:26,917 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-11-29 18:15:26,918 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-11-29 18:15:26,918 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-11-29 18:15:26,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-11-29 18:15:26,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:26,919 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-11-29 18:15:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-11-29 18:15:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-11-29 18:15:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-29 18:15:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-11-29 18:15:26,936 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-11-29 18:15:26,936 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-11-29 18:15:26,936 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 18:15:26,936 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-11-29 18:15:26,939 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-11-29 18:15:26,939 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:26,939 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:26,940 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:26,940 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:26,940 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-11-29 18:15:26,940 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-11-29 18:15:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:26,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-11-29 18:15:26,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:26,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804638912] [2020-11-29 18:15:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:27,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 18:15:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:27,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:15:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:27,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:15:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:15:27,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804638912] [2020-11-29 18:15:27,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175240231] [2020-11-29 18:15:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:15:27,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:15:27,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:27,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 18:15:27,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286615107] [2020-11-29 18:15:27,275 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:15:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-11-29 18:15:27,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:27,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443399558] [2020-11-29 18:15:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:27,284 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:27,293 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:27,294 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:27,419 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:27,419 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:27,419 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:27,419 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:27,419 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:15:27,419 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:27,419 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:27,419 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:27,419 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration4_Loop [2020-11-29 18:15:27,419 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:27,419 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:27,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:27,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:27,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:27,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:27,492 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:27,492 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:27,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:27,500 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:27,502 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:27,502 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:27,528 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:27,528 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:27,553 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:15:27,553 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:28,711 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:15:28,713 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:28,713 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:28,713 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:28,713 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:28,713 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:15:28,713 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:28,713 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:28,713 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:28,713 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration4_Loop [2020-11-29 18:15:28,713 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:28,713 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:28,714 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:28,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:28,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:28,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:28,781 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:28,781 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:28,785 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:28,787 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:28,787 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:28,787 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:28,787 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:28,787 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:28,788 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:28,788 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:28,789 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:28,812 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:28,813 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:28,814 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:28,814 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:28,814 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:28,814 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:28,819 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:28,819 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:28,822 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:15:28,828 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:15:28,828 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:28,830 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:15:28,830 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:15:28,831 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:15:28,831 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:15:28,850 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:15:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:28,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:15:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:28,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:28,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:29,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:15:29,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:29,158 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-11-29 18:15:29,158 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-11-29 18:15:29,439 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-11-29 18:15:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:15:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-11-29 18:15:29,442 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 18:15:29,443 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:29,443 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:15:29,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:15:29,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:29,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:29,534 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:15:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:29,653 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2020-11-29 18:15:29,653 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-11-29 18:15:29,889 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-11-29 18:15:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:15:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-11-29 18:15:29,893 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 18:15:29,894 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:29,894 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:15:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:15:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:29,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:29,986 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:30,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:15:30,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:30,084 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-11-29 18:15:30,085 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-11-29 18:15:30,420 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-11-29 18:15:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:15:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-11-29 18:15:30,422 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-11-29 18:15:30,434 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:30,434 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-11-29 18:15:30,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:30,438 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-11-29 18:15:30,441 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:30,442 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-11-29 18:15:30,470 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-11-29 18:15:30,486 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-11-29 18:15:30,487 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-11-29 18:15:30,488 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-11-29 18:15:30,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-11-29 18:15:30,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:30,488 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-11-29 18:15:30,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-11-29 18:15:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-11-29 18:15:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-11-29 18:15:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-11-29 18:15:30,532 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-11-29 18:15:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:30,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:15:30,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:15:30,533 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-11-29 18:15:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:30,789 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-11-29 18:15:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:15:30,790 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-11-29 18:15:30,800 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:30,811 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-11-29 18:15:30,812 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-11-29 18:15:30,812 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-11-29 18:15:30,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-11-29 18:15:30,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:30,813 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-11-29 18:15:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-11-29 18:15:30,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-11-29 18:15:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-11-29 18:15:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-11-29 18:15:30,870 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-11-29 18:15:30,871 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-11-29 18:15:30,871 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 18:15:30,871 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-11-29 18:15:30,875 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:30,876 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:30,877 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:30,878 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:30,878 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:15:30,879 INFO L794 eck$LassoCheckResult]: Stem: 3811#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3863#L10 assume !(1 == ~n); 3859#L13 call #t~ret7 := fibo(~n - 1);< 3861#fiboENTRY ~n := #in~n; 3862#L8 assume !(~n < 1); 3858#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3856#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3857#L8 assume !(~n < 1); 3840#L10 assume 1 == ~n;#res := 1; 3843#fiboFINAL assume true; 3915#fiboEXIT >#35#return; 3909#L13-1 call #t~ret8 := fibo(~n - 2);< 3911#fiboENTRY ~n := #in~n; 4104#L8 assume !(~n < 1); 4031#L10 assume !(1 == ~n); 4032#L13 call #t~ret7 := fibo(~n - 1);< 4042#fiboENTRY ~n := #in~n; 4068#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4050#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-11-29 18:15:30,879 INFO L796 eck$LassoCheckResult]: Loop: 4060#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4066#L10 assume !(1 == ~n); 4059#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-11-29 18:15:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-11-29 18:15:30,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:30,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703376015] [2020-11-29 18:15:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:31,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-29 18:15:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:15:31,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703376015] [2020-11-29 18:15:31,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948475832] [2020-11-29 18:15:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:31,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:15:31,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:15:31,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:31,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 18:15:31,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198520574] [2020-11-29 18:15:31,203 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:15:31,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:31,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-11-29 18:15:31,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:31,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284845373] [2020-11-29 18:15:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:31,207 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:31,209 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:31,210 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:31,309 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:31,309 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:31,309 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:31,309 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:31,309 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:15:31,309 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,309 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:31,309 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:31,309 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2020-11-29 18:15:31,310 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:31,310 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:31,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,406 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:31,406 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,411 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:31,411 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:31,413 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:31,414 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,441 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:31,441 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:31,443 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:31,444 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/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 [2020-11-29 18:15:31,470 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:31,470 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:31,472 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:31,472 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,501 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:31,501 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/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 [2020-11-29 18:15:31,532 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:15:31,532 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:31,612 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:15:31,614 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:31,614 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:31,614 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:31,614 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:31,614 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:15:31,614 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,615 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:31,615 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:31,615 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2020-11-29 18:15:31,615 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:31,615 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:31,615 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:31,687 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:31,687 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,690 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:31,691 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:31,691 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:31,692 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:31,692 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:31,692 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:31,692 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:31,692 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:31,694 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,721 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:31,723 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:31,723 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:31,723 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:31,723 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:31,723 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:31,724 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:31,724 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:31,733 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:15:31,779 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:31,781 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:31,781 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:31,781 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:31,781 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:31,781 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:31,782 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:31,782 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,784 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:15:31,833 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:31,835 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:31,835 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:31,836 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:31,836 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:31,836 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:31,837 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:31,837 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,839 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,883 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:31,884 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:31,884 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:31,885 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:31,885 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:31,885 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:31,886 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:31,886 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:31,889 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:15:31,895 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:15:31,895 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:15:31,901 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:15:31,901 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:15:31,901 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:15:31,902 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:31,945 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:15:31,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:32,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:15:32,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:32,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:32,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:32,126 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 18:15:32,126 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-11-29 18:15:32,284 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-11-29 18:15:32,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 18:15:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-11-29 18:15:32,287 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 18:15:32,289 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:32,289 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:15:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:32,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:15:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:32,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:32,497 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 18:15:32,497 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-11-29 18:15:32,579 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-11-29 18:15:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:32,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 18:15:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-11-29 18:15:32,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 18:15:32,584 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:32,584 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:15:32,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:32,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:15:32,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:32,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:32,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:32,812 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 18:15:32,812 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-11-29 18:15:32,930 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 617 states and 861 transitions. Complement of second has 14 states. [2020-11-29 18:15:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 18:15:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-11-29 18:15:32,935 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-11-29 18:15:32,938 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:32,938 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-11-29 18:15:32,940 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:32,940 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-11-29 18:15:32,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:32,943 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-11-29 18:15:32,955 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:32,967 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-11-29 18:15:32,968 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-11-29 18:15:32,969 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-11-29 18:15:32,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-11-29 18:15:32,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:32,970 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-11-29 18:15:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-11-29 18:15:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-11-29 18:15:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-11-29 18:15:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-11-29 18:15:33,011 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-11-29 18:15:33,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:15:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:15:33,013 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-11-29 18:15:33,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:33,321 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-11-29 18:15:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:15:33,323 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-11-29 18:15:33,334 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:33,346 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-11-29 18:15:33,346 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-11-29 18:15:33,347 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-11-29 18:15:33,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-11-29 18:15:33,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:33,350 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-11-29 18:15:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-11-29 18:15:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-11-29 18:15:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-11-29 18:15:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-11-29 18:15:33,382 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-11-29 18:15:33,382 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-11-29 18:15:33,382 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 18:15:33,383 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-11-29 18:15:33,388 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:33,388 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:33,389 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:33,391 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:33,391 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:15:33,392 INFO L794 eck$LassoCheckResult]: Stem: 7334#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7329#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 7325#L27 call main_#t~ret9 := fibo(main_~x~0);< 7347#fiboENTRY ~n := #in~n; 7348#L8 assume !(~n < 1); 7391#L10 assume !(1 == ~n); 7383#L13 call #t~ret7 := fibo(~n - 1);< 7384#fiboENTRY ~n := #in~n; 7393#L8 assume !(~n < 1); 7392#L10 assume !(1 == ~n); 7376#L13 call #t~ret7 := fibo(~n - 1);< 7388#fiboENTRY ~n := #in~n; 7387#L8 assume !(~n < 1); 7386#L10 assume !(1 == ~n); 7380#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7515#L8 assume !(~n < 1); 7426#L10 assume !(1 == ~n); 7379#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7493#L8 assume !(~n < 1); 7491#L10 assume 1 == ~n;#res := 1; 7487#fiboFINAL assume true; 7463#fiboEXIT >#35#return; 7448#L13-1 call #t~ret8 := fibo(~n - 2);< 7451#fiboENTRY ~n := #in~n; 7744#L8 assume !(~n < 1); 7741#L10 assume !(1 == ~n); 7351#L13 call #t~ret7 := fibo(~n - 1);< 7358#fiboENTRY ~n := #in~n; 7359#L8 assume !(~n < 1); 7794#L10 assume !(1 == ~n); 7363#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-11-29 18:15:33,392 INFO L796 eck$LassoCheckResult]: Loop: 7362#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-11-29 18:15:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:33,393 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-11-29 18:15:33,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:33,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371981774] [2020-11-29 18:15:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:33,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 18:15:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 18:15:33,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371981774] [2020-11-29 18:15:33,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172756677] [2020-11-29 18:15:33,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:33,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:15:33,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:33,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:15:33,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 18:15:33,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:33,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 18:15:33,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796409028] [2020-11-29 18:15:33,722 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:15:33,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:33,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-11-29 18:15:33,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:33,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447400710] [2020-11-29 18:15:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:33,732 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:33,735 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:33,740 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:33,804 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:33,804 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:33,804 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:33,804 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:33,804 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:15:33,804 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:33,804 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:33,805 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:33,805 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2020-11-29 18:15:33,805 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:33,805 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:33,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:33,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:33,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:33,822 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:33,884 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:33,884 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:33,891 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:33,892 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:33,905 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:33,905 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:33,938 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:33,938 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:33,945 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:33,946 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:33,974 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:33,974 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:34,008 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:15:34,008 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:42,582 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:15:42,585 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:42,585 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:42,585 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:42,585 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:42,585 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:15:42,585 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:42,585 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:42,585 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:42,585 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2020-11-29 18:15:42,585 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:42,585 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:42,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:42,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:42,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:42,607 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:42,735 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:42,735 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:42,743 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:42,744 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:42,744 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:42,745 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:42,745 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:42,745 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:42,745 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:42,745 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:42,747 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:42,771 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:42,772 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:42,773 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:42,773 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:42,773 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:42,773 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:42,773 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:42,773 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:42,775 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:42,800 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:42,802 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:42,802 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:42,802 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:42,802 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:42,802 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:42,804 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:42,804 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:42,806 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:15:42,809 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:15:42,809 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:42,812 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:15:42,812 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:15:42,812 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:15:42,812 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:15:42,836 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:15:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:42,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 18:15:42,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:42,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:42,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:43,000 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:15:43,000 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-11-29 18:15:43,084 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 523 states and 769 transitions. Complement of second has 18 states. [2020-11-29 18:15:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:15:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 18:15:43,086 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-11-29 18:15:43,086 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:43,086 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:15:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 18:15:43,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:43,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:43,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:43,296 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:15:43,296 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-11-29 18:15:43,489 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 753 states and 1085 transitions. Complement of second has 22 states. [2020-11-29 18:15:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:15:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 18:15:43,491 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-11-29 18:15:43,491 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:43,491 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-11-29 18:15:43,491 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:43,491 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-11-29 18:15:43,491 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:43,492 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-11-29 18:15:43,506 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:43,518 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-11-29 18:15:43,519 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-11-29 18:15:43,520 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-11-29 18:15:43,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-11-29 18:15:43,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:43,523 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-11-29 18:15:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-11-29 18:15:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-11-29 18:15:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-11-29 18:15:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-11-29 18:15:43,556 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-11-29 18:15:43,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:43,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 18:15:43,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:15:43,561 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-11-29 18:15:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:43,863 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-11-29 18:15:43,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 18:15:43,864 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-11-29 18:15:43,875 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:43,887 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-11-29 18:15:43,887 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-11-29 18:15:43,888 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-11-29 18:15:43,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-11-29 18:15:43,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:43,889 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-11-29 18:15:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-11-29 18:15:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-11-29 18:15:43,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-11-29 18:15:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-11-29 18:15:43,916 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 18:15:43,916 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 18:15:43,916 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 18:15:43,916 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-11-29 18:15:43,922 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:43,922 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:43,922 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:43,926 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:43,926 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:15:43,926 INFO L794 eck$LassoCheckResult]: Stem: 10978#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10969#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 10970#L27 call main_#t~ret9 := fibo(main_~x~0);< 10986#fiboENTRY ~n := #in~n; 11071#L8 assume !(~n < 1); 11069#L10 assume !(1 == ~n); 11066#L13 call #t~ret7 := fibo(~n - 1);< 11067#fiboENTRY ~n := #in~n; 11101#L8 assume !(~n < 1); 11100#L10 assume !(1 == ~n); 11078#L13 call #t~ret7 := fibo(~n - 1);< 11081#fiboENTRY ~n := #in~n; 11099#L8 assume !(~n < 1); 11083#L10 assume !(1 == ~n); 11073#L13 call #t~ret7 := fibo(~n - 1);< 11079#fiboENTRY ~n := #in~n; 11110#L8 assume !(~n < 1); 11109#L10 assume !(1 == ~n); 11095#L13 call #t~ret7 := fibo(~n - 1);< 11108#fiboENTRY ~n := #in~n; 11141#L8 assume !(~n < 1); 11130#L10 assume !(1 == ~n); 11096#L13 call #t~ret7 := fibo(~n - 1);< 11129#fiboENTRY ~n := #in~n; 11174#L8 assume !(~n < 1); 11161#L10 assume 1 == ~n;#res := 1; 11158#fiboFINAL assume true; 11156#fiboEXIT >#35#return; 11136#L13-1 call #t~ret8 := fibo(~n - 2);< 11138#fiboENTRY ~n := #in~n; 11152#L8 assume ~n < 1;#res := 0; 11149#fiboFINAL assume true; 11135#fiboEXIT >#37#return; 11134#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 11128#fiboFINAL assume true; 11107#fiboEXIT >#35#return; 11091#L13-1 call #t~ret8 := fibo(~n - 2);< 11098#fiboENTRY ~n := #in~n; 11159#L8 assume !(~n < 1); 11120#L10 assume !(1 == ~n); 11122#L13 call #t~ret7 := fibo(~n - 1);< 11148#fiboENTRY ~n := #in~n; 11320#L8 assume !(~n < 1); 11318#L10 assume !(1 == ~n); 11304#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-11-29 18:15:43,926 INFO L796 eck$LassoCheckResult]: Loop: 11305#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-11-29 18:15:43,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:43,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-11-29 18:15:43,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:43,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179400527] [2020-11-29 18:15:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:44,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 18:15:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:44,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:15:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:44,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:15:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:15:44,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179400527] [2020-11-29 18:15:44,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849674460] [2020-11-29 18:15:44,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:44,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:15:44,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:44,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 18:15:44,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:15:44,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:44,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 18:15:44,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619065704] [2020-11-29 18:15:44,257 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:15:44,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:44,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-11-29 18:15:44,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:44,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389552701] [2020-11-29 18:15:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:44,262 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:44,264 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:44,266 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:44,306 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:44,306 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:44,306 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:44,306 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:44,306 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:15:44,306 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:44,306 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:44,307 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:44,307 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2020-11-29 18:15:44,307 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:44,307 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:44,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:44,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:44,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:44,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:44,380 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:44,380 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:15:44,387 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:44,387 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:44,430 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:15:44,430 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:45,893 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:15:45,895 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:45,895 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:45,895 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:45,895 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:45,895 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:15:45,895 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:45,895 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:45,895 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:45,895 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2020-11-29 18:15:45,895 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:45,895 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:45,896 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:45,898 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:45,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:45,903 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:45,953 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:45,953 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:45,960 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:45,961 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:45,962 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:45,962 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:45,962 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:45,962 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:45,962 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:45,962 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:45,964 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:45,989 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:45,991 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:45,991 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:45,991 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:45,991 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:45,991 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:45,992 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:45,992 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:45,993 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:46,019 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:46,021 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:46,021 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:46,021 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:46,021 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:46,021 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:46,022 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:46,022 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:46,023 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:46,051 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:46,053 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:46,053 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:46,053 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:46,053 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:46,053 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:46,055 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:46,055 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:46,058 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:15:46,061 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:15:46,061 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:46,063 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:15:46,063 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:15:46,063 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:15:46,063 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:15:46,085 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:15:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:46,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:15:46,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:46,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:46,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:46,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:46,344 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:15:46,344 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-11-29 18:15:46,419 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 731 states and 1065 transitions. Complement of second has 18 states. [2020-11-29 18:15:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:46,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:15:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 18:15:46,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 18:15:46,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:46,421 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:15:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:46,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:15:46,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:46,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:46,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:46,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:46,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:46,618 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:15:46,618 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-11-29 18:15:46,716 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 916 states and 1284 transitions. Complement of second has 22 states. [2020-11-29 18:15:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:15:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 18:15:46,718 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 18:15:46,718 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:46,718 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:15:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:46,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:15:46,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:46,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:46,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:46,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:46,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:46,927 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:15:46,928 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-11-29 18:15:47,031 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 959 states and 1365 transitions. Complement of second has 27 states. [2020-11-29 18:15:47,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:15:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 18:15:47,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-11-29 18:15:47,033 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:47,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-11-29 18:15:47,034 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:47,034 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-11-29 18:15:47,035 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:47,035 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-11-29 18:15:47,046 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:47,057 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-11-29 18:15:47,057 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-11-29 18:15:47,058 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-11-29 18:15:47,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-11-29 18:15:47,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:47,059 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 18:15:47,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-11-29 18:15:47,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-11-29 18:15:47,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-11-29 18:15:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-11-29 18:15:47,084 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-11-29 18:15:47,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:47,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:15:47,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:15:47,085 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-11-29 18:15:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:47,508 INFO L93 Difference]: Finished difference Result 777 states and 1127 transitions. [2020-11-29 18:15:47,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 18:15:47,509 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1127 transitions. [2020-11-29 18:15:47,520 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:47,533 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1127 transitions. [2020-11-29 18:15:47,533 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-11-29 18:15:47,534 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-11-29 18:15:47,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1127 transitions. [2020-11-29 18:15:47,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:47,534 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1127 transitions. [2020-11-29 18:15:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1127 transitions. [2020-11-29 18:15:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 736. [2020-11-29 18:15:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-11-29 18:15:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-11-29 18:15:47,562 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-11-29 18:15:47,562 INFO L594 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-11-29 18:15:47,562 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 18:15:47,562 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 736 states and 1081 transitions. [2020-11-29 18:15:47,568 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:47,568 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:47,568 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:47,569 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 18:15:47,570 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:15:47,570 INFO L794 eck$LassoCheckResult]: Stem: 16565#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16555#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 16556#L27 call main_#t~ret9 := fibo(main_~x~0);< 16581#fiboENTRY ~n := #in~n; 16655#L8 assume !(~n < 1); 16654#L10 assume !(1 == ~n); 16650#L13 call #t~ret7 := fibo(~n - 1);< 16653#fiboENTRY ~n := #in~n; 16652#L8 assume !(~n < 1); 16651#L10 assume !(1 == ~n); 16646#L13 call #t~ret7 := fibo(~n - 1);< 16649#fiboENTRY ~n := #in~n; 16648#L8 assume !(~n < 1); 16647#L10 assume !(1 == ~n); 16639#L13 call #t~ret7 := fibo(~n - 1);< 16645#fiboENTRY ~n := #in~n; 16643#L8 assume !(~n < 1); 16641#L10 assume !(1 == ~n); 16627#L13 call #t~ret7 := fibo(~n - 1);< 16632#fiboENTRY ~n := #in~n; 16637#L8 assume !(~n < 1); 16635#L10 assume !(1 == ~n); 16626#L13 call #t~ret7 := fibo(~n - 1);< 16632#fiboENTRY ~n := #in~n; 16638#L8 assume !(~n < 1); 16636#L10 assume 1 == ~n;#res := 1; 16633#fiboFINAL assume true; 16625#fiboEXIT >#35#return; 16622#L13-1 call #t~ret8 := fibo(~n - 2);< 16621#fiboENTRY ~n := #in~n; 16623#L8 assume !(~n < 1); 16800#L10 assume !(1 == ~n); 16618#L13 call #t~ret7 := fibo(~n - 1);< 16629#fiboENTRY ~n := #in~n; 16644#L8 assume !(~n < 1); 17177#L10 assume !(1 == ~n); 16574#L13 call #t~ret7 := fibo(~n - 1);< 17212#fiboENTRY ~n := #in~n; 17254#L8 assume !(~n < 1); 17253#L10 assume 1 == ~n;#res := 1; 17216#fiboFINAL assume true; 17211#fiboEXIT >#35#return; 16933#L13-1 call #t~ret8 := fibo(~n - 2);< 16936#fiboENTRY ~n := #in~n; 17208#L8 assume ~n < 1;#res := 0; 17205#fiboFINAL assume true; 16931#fiboEXIT >#37#return; 16822#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 16821#fiboFINAL assume true; 16801#fiboEXIT >#35#return; 16746#L13-1 call #t~ret8 := fibo(~n - 2);< 16754#fiboENTRY ~n := #in~n; 16812#L8 assume !(~n < 1); 16807#L10 assume !(1 == ~n); 16809#L13 call #t~ret7 := fibo(~n - 1);< 16834#fiboENTRY ~n := #in~n; 16891#L8 assume !(~n < 1); 17022#L10 assume !(1 == ~n); 16925#L13 call #t~ret7 := fibo(~n - 1);< 16929#fiboENTRY ~n := #in~n; 16967#L8 assume !(~n < 1); 16966#L10 assume !(1 == ~n); 16926#L13 [2020-11-29 18:15:47,570 INFO L796 eck$LassoCheckResult]: Loop: 16926#L13 call #t~ret7 := fibo(~n - 1);< 16929#fiboENTRY ~n := #in~n; 16967#L8 assume !(~n < 1); 16966#L10 assume !(1 == ~n); 16926#L13 [2020-11-29 18:15:47,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:47,571 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-11-29 18:15:47,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:47,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764945465] [2020-11-29 18:15:47,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:47,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 18:15:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:47,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-29 18:15:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:47,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:15:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:47,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:15:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-11-29 18:15:47,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764945465] [2020-11-29 18:15:47,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121581453] [2020-11-29 18:15:47,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:47,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 18:15:47,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:47,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:15:47,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-29 18:15:48,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:48,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-11-29 18:15:48,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309957154] [2020-11-29 18:15:48,053 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:15:48,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:48,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-11-29 18:15:48,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:48,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180852284] [2020-11-29 18:15:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:48,056 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:48,058 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:48,058 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:48,129 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:48,129 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:48,129 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:48,129 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:48,129 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:15:48,130 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:48,130 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:48,130 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:48,130 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2020-11-29 18:15:48,130 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:48,130 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:48,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:48,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:48,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:48,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:48,221 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:48,222 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:48,231 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:48,232 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:48,234 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:48,234 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:48,260 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:48,260 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:48,263 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:48,263 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:48,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:48,290 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:48,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:15:48,320 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:49,853 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:15:49,854 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:49,854 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:49,854 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:49,855 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:49,855 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:15:49,855 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:49,855 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:49,855 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:49,855 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2020-11-29 18:15:49,855 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:49,855 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:49,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:49,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:49,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:49,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:49,929 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:49,929 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:49,932 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:49,933 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:49,934 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:49,934 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:49,934 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:49,934 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:49,934 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:49,934 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:49,936 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:49,957 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:49,958 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:49,959 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:49,959 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:49,959 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:49,959 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:49,959 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:49,959 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:49,960 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:49,982 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:15:49,984 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:15:49,984 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:15:49,984 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:15:49,984 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:15:49,984 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:15:49,985 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:15:49,985 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:15:49,987 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:15:49,989 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:15:49,989 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:49,991 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:15:49,991 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:15:49,991 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:15:49,992 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:15:50,012 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:15:50,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:50,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 18:15:50,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:50,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:50,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:50,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:50,257 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:15:50,257 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-11-29 18:15:50,336 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 755 states and 1101 transitions. Complement of second has 18 states. [2020-11-29 18:15:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:15:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 18:15:50,337 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 18:15:50,338 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:50,338 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:15:50,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:50,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 18:15:50,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:50,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:50,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:50,580 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:15:50,580 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-11-29 18:15:50,744 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 940 states and 1320 transitions. Complement of second has 22 states. [2020-11-29 18:15:50,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:15:50,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 18:15:50,746 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 18:15:50,747 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:50,747 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:15:50,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:50,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 18:15:50,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:50,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:50,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:15:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:15:50,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:15:50,938 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:15:50,938 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-11-29 18:15:51,043 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 983 states and 1401 transitions. Complement of second has 27 states. [2020-11-29 18:15:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:15:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:15:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 18:15:51,045 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-11-29 18:15:51,046 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:51,046 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-11-29 18:15:51,047 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:51,047 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-11-29 18:15:51,048 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:15:51,048 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 983 states and 1401 transitions. [2020-11-29 18:15:51,061 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-11-29 18:15:51,074 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 983 states to 736 states and 1081 transitions. [2020-11-29 18:15:51,075 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 231 [2020-11-29 18:15:51,076 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 267 [2020-11-29 18:15:51,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 736 states and 1081 transitions. [2020-11-29 18:15:51,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:51,076 INFO L691 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-11-29 18:15:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states and 1081 transitions. [2020-11-29 18:15:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2020-11-29 18:15:51,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-11-29 18:15:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-11-29 18:15:51,108 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-11-29 18:15:51,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:15:51,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 18:15:51,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-11-29 18:15:51,110 INFO L87 Difference]: Start difference. First operand 736 states and 1081 transitions. Second operand 23 states. [2020-11-29 18:15:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:15:51,855 INFO L93 Difference]: Finished difference Result 456 states and 590 transitions. [2020-11-29 18:15:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 18:15:51,856 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 456 states and 590 transitions. [2020-11-29 18:15:51,861 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:15:51,866 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 456 states to 384 states and 507 transitions. [2020-11-29 18:15:51,867 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 165 [2020-11-29 18:15:51,867 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 184 [2020-11-29 18:15:51,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 384 states and 507 transitions. [2020-11-29 18:15:51,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:15:51,868 INFO L691 BuchiCegarLoop]: Abstraction has 384 states and 507 transitions. [2020-11-29 18:15:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states and 507 transitions. [2020-11-29 18:15:51,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2020-11-29 18:15:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-29 18:15:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-11-29 18:15:51,880 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-11-29 18:15:51,880 INFO L594 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-11-29 18:15:51,880 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 18:15:51,880 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 318 states and 425 transitions. [2020-11-29 18:15:51,883 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:15:51,883 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:15:51,883 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:15:51,885 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-11-29 18:15:51,885 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:15:51,886 INFO L794 eck$LassoCheckResult]: Stem: 22131#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22122#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 22123#L27 call main_#t~ret9 := fibo(main_~x~0);< 22144#fiboENTRY ~n := #in~n; 22237#L8 assume !(~n < 1); 22235#L10 assume !(1 == ~n); 22215#L13 call #t~ret7 := fibo(~n - 1);< 22230#fiboENTRY ~n := #in~n; 22224#L8 assume !(~n < 1); 22221#L10 assume !(1 == ~n); 22217#L13 call #t~ret7 := fibo(~n - 1);< 22218#fiboENTRY ~n := #in~n; 22272#L8 assume !(~n < 1); 22271#L10 assume !(1 == ~n); 22232#L13 call #t~ret7 := fibo(~n - 1);< 22234#fiboENTRY ~n := #in~n; 22241#L8 assume !(~n < 1); 22240#L10 assume !(1 == ~n); 22227#L13 call #t~ret7 := fibo(~n - 1);< 22239#fiboENTRY ~n := #in~n; 22257#L8 assume !(~n < 1); 22254#L10 assume !(1 == ~n); 22111#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22277#fiboENTRY ~n := #in~n; 22410#L8 assume !(~n < 1); 22409#L10 assume 1 == ~n;#res := 1; 22408#fiboFINAL assume true; 22407#fiboEXIT >#35#return; 22110#L13-1 call #t~ret8 := fibo(~n - 2);< 22113#fiboENTRY ~n := #in~n; 22418#L8 assume ~n < 1;#res := 0; 22416#fiboFINAL assume true; 22414#fiboEXIT >#37#return; 22412#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22411#fiboFINAL assume true; 22297#fiboEXIT >#35#return; 22288#L13-1 call #t~ret8 := fibo(~n - 2);< 22290#fiboENTRY ~n := #in~n; 22349#L8 assume !(~n < 1); 22312#L10 assume 1 == ~n;#res := 1; 22308#fiboFINAL assume true; 22287#fiboEXIT >#37#return; 22283#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22281#fiboFINAL assume true; 22280#fiboEXIT >#35#return; 22245#L13-1 call #t~ret8 := fibo(~n - 2);< 22248#fiboENTRY ~n := #in~n; 22316#L8 assume !(~n < 1); 22313#L10 assume !(1 == ~n); 22136#L13 call #t~ret7 := fibo(~n - 1);< 22126#fiboENTRY ~n := #in~n; 22204#L8 assume !(~n < 1); 22205#L10 assume !(1 == ~n); 22173#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22171#L13 [2020-11-29 18:15:51,886 INFO L796 eck$LassoCheckResult]: Loop: 22171#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22171#L13 [2020-11-29 18:15:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:51,887 INFO L82 PathProgramCache]: Analyzing trace with hash 817988141, now seen corresponding path program 4 times [2020-11-29 18:15:51,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:51,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173230976] [2020-11-29 18:15:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:52,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 18:15:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:52,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:15:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:52,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:15:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:52,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:15:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:52,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 18:15:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:15:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-29 18:15:52,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173230976] [2020-11-29 18:15:52,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784648230] [2020-11-29 18:15:52,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:15:52,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:15:52,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:15:52,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 18:15:52,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:15:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-29 18:15:52,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:15:52,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 18:15:52,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474314736] [2020-11-29 18:15:52,358 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:15:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:15:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-11-29 18:15:52,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:15:52,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980837652] [2020-11-29 18:15:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:15:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:52,361 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:15:52,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:15:52,363 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:15:52,410 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:15:52,410 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:15:52,410 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:15:52,410 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:15:52,410 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:15:52,410 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:52,410 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:15:52,410 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:15:52,410 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2020-11-29 18:15:52,410 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:15:52,410 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:15:52,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:52,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:52,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:52,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:15:52,483 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:15:52,483 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:52,488 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:52,488 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:52,490 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:52,490 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:52,512 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:52,512 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:52,515 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:52,515 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:52,540 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:52,540 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:15:52,543 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:15:52,543 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:52,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:15:52,571 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:15:52,603 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:15:52,603 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:16:00,001 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:16:00,003 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:16:00,003 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:16:00,003 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:16:00,003 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:16:00,003 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:16:00,003 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:00,003 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:16:00,004 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:16:00,004 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2020-11-29 18:16:00,004 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:16:00,004 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:16:00,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:00,007 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:00,011 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:00,019 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:00,074 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:16:00,074 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:00,077 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:16:00,078 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:16:00,078 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:16:00,078 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:16:00,078 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:16:00,078 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:16:00,079 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:16:00,079 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:16:00,080 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:00,107 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:16:00,108 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:16:00,109 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:16:00,109 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:16:00,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:16:00,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:16:00,109 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:16:00,109 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:16:00,110 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:00,132 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:16:00,133 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:16:00,133 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:16:00,133 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:16:00,133 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:16:00,133 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:16:00,134 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:16:00,134 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:16:00,136 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:16:00,138 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:16:00,138 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:00,140 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:16:00,140 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:16:00,140 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:16:00,140 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:16:00,159 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:16:00,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:16:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:00,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 18:16:00,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:00,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:00,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:16:00,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:16:00,399 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:16:00,399 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-11-29 18:16:00,475 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 337 states and 445 transitions. Complement of second has 18 states. [2020-11-29 18:16:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:16:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:16:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 18:16:00,476 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2020-11-29 18:16:00,477 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:00,477 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:16:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:16:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 18:16:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:00,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:00,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:16:00,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:16:00,679 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:16:00,679 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-11-29 18:16:00,788 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 343 states and 451 transitions. Complement of second has 17 states. [2020-11-29 18:16:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-29 18:16:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:16:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 18:16:00,789 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2020-11-29 18:16:00,789 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:00,790 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:16:00,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:16:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 18:16:00,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:00,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:00,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:16:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:16:01,023 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:16:01,024 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-11-29 18:16:01,126 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 424 states and 555 transitions. Complement of second has 27 states. [2020-11-29 18:16:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:16:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:16:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 18:16:01,127 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2020-11-29 18:16:01,128 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:01,128 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-11-29 18:16:01,129 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:01,129 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-29 18:16:01,130 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:01,130 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 424 states and 555 transitions. [2020-11-29 18:16:01,136 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:16:01,141 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 424 states to 326 states and 435 transitions. [2020-11-29 18:16:01,142 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2020-11-29 18:16:01,142 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-11-29 18:16:01,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 326 states and 435 transitions. [2020-11-29 18:16:01,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:16:01,145 INFO L691 BuchiCegarLoop]: Abstraction has 326 states and 435 transitions. [2020-11-29 18:16:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states and 435 transitions. [2020-11-29 18:16:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-11-29 18:16:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-29 18:16:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-11-29 18:16:01,157 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-11-29 18:16:01,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:16:01,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 18:16:01,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-11-29 18:16:01,159 INFO L87 Difference]: Start difference. First operand 318 states and 425 transitions. Second operand 20 states. [2020-11-29 18:16:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:16:01,786 INFO L93 Difference]: Finished difference Result 462 states and 631 transitions. [2020-11-29 18:16:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 18:16:01,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 462 states and 631 transitions. [2020-11-29 18:16:01,792 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:16:01,799 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 462 states to 451 states and 614 transitions. [2020-11-29 18:16:01,800 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 204 [2020-11-29 18:16:01,800 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 204 [2020-11-29 18:16:01,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 451 states and 614 transitions. [2020-11-29 18:16:01,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:16:01,801 INFO L691 BuchiCegarLoop]: Abstraction has 451 states and 614 transitions. [2020-11-29 18:16:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states and 614 transitions. [2020-11-29 18:16:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 384. [2020-11-29 18:16:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-11-29 18:16:01,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-11-29 18:16:01,815 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-11-29 18:16:01,815 INFO L594 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-11-29 18:16:01,815 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 18:16:01,815 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 384 states and 515 transitions. [2020-11-29 18:16:01,818 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:16:01,819 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:16:01,819 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:16:01,824 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-11-29 18:16:01,824 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:16:01,826 INFO L794 eck$LassoCheckResult]: Stem: 25398#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 25375#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 25376#L27 call main_#t~ret9 := fibo(main_~x~0);< 25405#fiboENTRY ~n := #in~n; 25583#L8 assume !(~n < 1); 25507#L10 assume !(1 == ~n); 25494#L13 call #t~ret7 := fibo(~n - 1);< 25505#fiboENTRY ~n := #in~n; 25503#L8 assume !(~n < 1); 25501#L10 assume !(1 == ~n); 25497#L13 call #t~ret7 := fibo(~n - 1);< 25498#fiboENTRY ~n := #in~n; 25546#L8 assume !(~n < 1); 25532#L10 assume !(1 == ~n); 25522#L13 call #t~ret7 := fibo(~n - 1);< 25527#fiboENTRY ~n := #in~n; 25531#L8 assume !(~n < 1); 25526#L10 assume !(1 == ~n); 25518#L13 call #t~ret7 := fibo(~n - 1);< 25525#fiboENTRY ~n := #in~n; 25554#L8 assume !(~n < 1); 25552#L10 assume !(1 == ~n); 25534#L13 call #t~ret7 := fibo(~n - 1);< 25548#fiboENTRY ~n := #in~n; 25747#L8 assume !(~n < 1); 25746#L10 assume !(1 == ~n); 25392#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25635#fiboENTRY ~n := #in~n; 25742#L8 assume !(~n < 1); 25424#L10 assume 1 == ~n;#res := 1; 25425#fiboFINAL assume true; 25719#fiboEXIT >#35#return; 25390#L13-1 call #t~ret8 := fibo(~n - 2);< 25393#fiboENTRY ~n := #in~n; 25756#L8 assume ~n < 1;#res := 0; 25755#fiboFINAL assume true; 25754#fiboEXIT >#37#return; 25380#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 25753#fiboFINAL assume true; 25752#fiboEXIT >#35#return; 25378#L13-1 call #t~ret8 := fibo(~n - 2);< 25645#fiboENTRY ~n := #in~n; 25748#L8 assume !(~n < 1); 25672#L10 assume 1 == ~n;#res := 1; 25661#fiboFINAL assume true; 25642#fiboEXIT >#37#return; 25641#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 25634#fiboFINAL assume true; 25610#fiboEXIT >#35#return; 25379#L13-1 call #t~ret8 := fibo(~n - 2);< 25543#fiboENTRY ~n := #in~n; 25662#L8 assume !(~n < 1); 25660#L10 assume !(1 == ~n); 25630#L13 call #t~ret7 := fibo(~n - 1);< 25657#fiboENTRY ~n := #in~n; 25666#L8 assume !(~n < 1); 25758#L10 assume !(1 == ~n); 25453#L13 call #t~ret7 := fibo(~n - 1);< 25450#fiboENTRY ~n := #in~n; 25668#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25454#L13 [2020-11-29 18:16:01,827 INFO L796 eck$LassoCheckResult]: Loop: 25454#L13 call #t~ret7 := fibo(~n - 1);< 25450#fiboENTRY ~n := #in~n; 25668#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25454#L13 [2020-11-29 18:16:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:16:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1637456312, now seen corresponding path program 5 times [2020-11-29 18:16:01,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:16:01,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782756411] [2020-11-29 18:16:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:16:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:02,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-29 18:16:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:02,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:16:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:02,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:16:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:02,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:16:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:02,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 18:16:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-11-29 18:16:02,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782756411] [2020-11-29 18:16:02,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210827768] [2020-11-29 18:16:02,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:16:02,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-29 18:16:02,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:16:02,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:16:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 179 proven. 18 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-11-29 18:16:02,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:16:02,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 24 [2020-11-29 18:16:02,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775953356] [2020-11-29 18:16:02,364 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:16:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:16:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 7 times [2020-11-29 18:16:02,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:16:02,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649563957] [2020-11-29 18:16:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:16:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:16:02,367 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:16:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:16:02,368 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:16:02,369 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:16:02,426 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:16:02,426 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:16:02,426 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:16:02,426 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:16:02,426 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:16:02,427 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:02,427 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:16:02,427 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:16:02,427 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2020-11-29 18:16:02,427 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:16:02,427 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:16:02,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:02,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:02,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:02,450 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:02,519 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:16:02,519 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:16:02,524 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:16:02,524 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:02,528 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:16:02,528 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:02,557 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:16:02,558 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:02,585 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:16:02,585 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:16:10,219 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:16:10,221 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:16:10,221 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:16:10,222 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:16:10,222 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:16:10,222 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:16:10,222 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:10,222 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:16:10,222 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:16:10,222 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2020-11-29 18:16:10,222 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:16:10,222 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:16:10,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:10,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:10,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:10,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:16:10,297 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:16:10,298 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:10,300 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:16:10,301 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:16:10,301 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:16:10,301 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:16:10,301 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:16:10,301 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:16:10,301 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:16:10,302 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:16:10,303 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:10,324 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:16:10,325 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:16:10,325 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:16:10,325 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:16:10,325 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:16:10,326 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:16:10,326 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:16:10,326 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:16:10,327 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:16:10,348 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 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:10,350 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:16:10,350 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:16:10,350 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:16:10,350 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:16:10,350 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:16:10,351 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:16:10,351 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:16:10,353 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:16:10,355 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:16:10,356 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_774cf37c-1437-46b5-8a43-dda9902f9037/bin/uautomizer/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:16:10,359 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:16:10,359 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:16:10,359 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:16:10,359 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-11-29 18:16:10,379 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:16:10,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:16:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:10,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 18:16:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:10,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:10,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:10,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:10,514 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:10,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:16:10,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:16:10,578 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:16:10,578 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-11-29 18:16:10,655 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 406 states and 538 transitions. Complement of second has 18 states. [2020-11-29 18:16:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:16:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:16:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-11-29 18:16:10,657 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 73 letters. Loop has 4 letters. [2020-11-29 18:16:10,657 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:10,657 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:16:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:16:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:10,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 18:16:10,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:10,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:10,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:10,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:10,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:10,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:16:10,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:16:10,887 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:16:10,887 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-11-29 18:16:11,023 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 412 states and 544 transitions. Complement of second has 17 states. [2020-11-29 18:16:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-29 18:16:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:16:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-11-29 18:16:11,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 73 letters. Loop has 4 letters. [2020-11-29 18:16:11,025 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:11,026 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:16:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:16:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:11,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 18:16:11,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:11,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:11,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:11,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:11,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:16:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:16:11,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:16:11,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:16:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:16:11,267 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-11-29 18:16:11,267 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-11-29 18:16:11,400 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 507 states and 666 transitions. Complement of second has 27 states. [2020-11-29 18:16:11,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:16:11,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:16:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-11-29 18:16:11,402 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-11-29 18:16:11,403 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:11,403 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 77 letters. Loop has 4 letters. [2020-11-29 18:16:11,403 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:11,404 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 8 letters. [2020-11-29 18:16:11,404 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:16:11,405 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 507 states and 666 transitions. [2020-11-29 18:16:11,411 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:16:11,417 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 507 states to 388 states and 520 transitions. [2020-11-29 18:16:11,417 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2020-11-29 18:16:11,417 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 156 [2020-11-29 18:16:11,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 388 states and 520 transitions. [2020-11-29 18:16:11,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:16:11,418 INFO L691 BuchiCegarLoop]: Abstraction has 388 states and 520 transitions. [2020-11-29 18:16:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states and 520 transitions. [2020-11-29 18:16:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 384. [2020-11-29 18:16:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-11-29 18:16:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-11-29 18:16:11,433 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-11-29 18:16:11,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:16:11,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 18:16:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-11-29 18:16:11,434 INFO L87 Difference]: Start difference. First operand 384 states and 515 transitions. Second operand 24 states. [2020-11-29 18:16:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:16:12,232 INFO L93 Difference]: Finished difference Result 542 states and 774 transitions. [2020-11-29 18:16:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 18:16:12,233 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 542 states and 774 transitions. [2020-11-29 18:16:12,240 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 18:16:12,240 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 542 states to 0 states and 0 transitions. [2020-11-29 18:16:12,240 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 18:16:12,240 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 18:16:12,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 18:16:12,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 18:16:12,241 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:16:12,241 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:16:12,241 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:16:12,241 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-29 18:16:12,241 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 18:16:12,242 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 18:16:12,251 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 18:16:12,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 06:16:12 BoogieIcfgContainer [2020-11-29 18:16:12,257 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 18:16:12,258 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:16:12,258 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:16:12,258 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:16:12,259 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:15:22" (3/4) ... [2020-11-29 18:16:12,262 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 18:16:12,262 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:16:12,264 INFO L168 Benchmark]: Toolchain (without parser) took 50712.04 ms. Allocated memory was 79.7 MB in the beginning and 174.1 MB in the end (delta: 94.4 MB). Free memory was 50.2 MB in the beginning and 145.9 MB in the end (delta: -95.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:16:12,264 INFO L168 Benchmark]: CDTParser took 16.63 ms. Allocated memory is still 79.7 MB. Free memory was 36.9 MB in the beginning and 52.6 MB in the end (delta: -15.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:16:12,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.98 ms. Allocated memory was 79.7 MB in the beginning and 98.6 MB in the end (delta: 18.9 MB). Free memory was 49.9 MB in the beginning and 77.1 MB in the end (delta: -27.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:16:12,269 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 98.6 MB. Free memory was 77.1 MB in the beginning and 75.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:16:12,270 INFO L168 Benchmark]: Boogie Preprocessor took 18.99 ms. Allocated memory is still 98.6 MB. Free memory was 75.9 MB in the beginning and 75.0 MB in the end (delta: 894.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:16:12,270 INFO L168 Benchmark]: RCFGBuilder took 280.40 ms. Allocated memory is still 98.6 MB. Free memory was 75.0 MB in the beginning and 63.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:16:12,271 INFO L168 Benchmark]: BuchiAutomizer took 50131.58 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 63.9 MB in the beginning and 145.9 MB in the end (delta: -82.0 MB). Peak memory consumption was 95.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:16:12,271 INFO L168 Benchmark]: Witness Printer took 4.59 ms. Allocated memory is still 174.1 MB. Free memory is still 145.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:16:12,274 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 16.63 ms. Allocated memory is still 79.7 MB. Free memory was 36.9 MB in the beginning and 52.6 MB in the end (delta: -15.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 234.98 ms. Allocated memory was 79.7 MB in the beginning and 98.6 MB in the end (delta: 18.9 MB). Free memory was 49.9 MB in the beginning and 77.1 MB in the end (delta: -27.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 98.6 MB. Free memory was 77.1 MB in the beginning and 75.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.99 ms. Allocated memory is still 98.6 MB. Free memory was 75.9 MB in the beginning and 75.0 MB in the end (delta: 894.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 280.40 ms. Allocated memory is still 98.6 MB. Free memory was 75.0 MB in the beginning and 63.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 50131.58 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 63.9 MB in the beginning and 145.9 MB in the end (delta: -82.0 MB). Peak memory consumption was 95.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.59 ms. Allocated memory is still 174.1 MB. Free memory is still 145.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 18 terminating modules (9 trivial, 3 deterministic, 6 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 9 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 50.0s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 37.1s. Construction of modules took 2.9s. Büchi inclusion checks took 8.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 17. Automata minimization 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 453 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 736 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 6, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 407 SDtfs, 1132 SDslu, 735 SDs, 0 SdLazy, 2447 SolverSat, 772 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT8 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf91 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf93 smp79 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 19 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 9 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 29.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...