./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 f8ce463a68003145f68f57eef3f97a99b93a908a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:05:58,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:05:58,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:05:59,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:05:59,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:05:59,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:05:59,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:05:59,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:05:59,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:05:59,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:05:59,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:05:59,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:05:59,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:05:59,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:05:59,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:05:59,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:05:59,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:05:59,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:05:59,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:05:59,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:05:59,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:05:59,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:05:59,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:05:59,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:05:59,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:05:59,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:05:59,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:05:59,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:05:59,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:05:59,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:05:59,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:05:59,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:05:59,122 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:05:59,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:05:59,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:05:59,125 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:05:59,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:05:59,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:05:59,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:05:59,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:05:59,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:05:59,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-28 03:05:59,177 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:05:59,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:05:59,179 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:05:59,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:05:59,179 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:05:59,179 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:05:59,180 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:05:59,180 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:05:59,180 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:05:59,180 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:05:59,180 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:05:59,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:05:59,181 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:05:59,181 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:05:59,181 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:05:59,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:05:59,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:05:59,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:05:59,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:05:59,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:05:59,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:05:59,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:05:59,183 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:05:59,183 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:05:59,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:05:59,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:05:59,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:05:59,184 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:05:59,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:05:59,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:05:59,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:05:59,185 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:05:59,186 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:05:59,186 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_46de6b59-d1ef-409c-a055-4690d7483769/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8ce463a68003145f68f57eef3f97a99b93a908a [2020-11-28 03:05:59,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:05:59,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:05:59,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:05:59,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:05:59,567 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:05:59,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2020-11-28 03:05:59,647 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/data/a870220de/629d15a5cc4e4648b835a2aeb1d3c497/FLAG338054bce [2020-11-28 03:06:00,141 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:06:00,141 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2020-11-28 03:06:00,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/data/a870220de/629d15a5cc4e4648b835a2aeb1d3c497/FLAG338054bce [2020-11-28 03:06:00,515 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/data/a870220de/629d15a5cc4e4648b835a2aeb1d3c497 [2020-11-28 03:06:00,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:06:00,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:06:00,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:06:00,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:06:00,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:06:00,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41a6a15f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00, skipping insertion in model container [2020-11-28 03:06:00,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:06:00,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:06:00,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:06:00,794 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:06:00,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:06:00,829 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:06:00,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00 WrapperNode [2020-11-28 03:06:00,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:06:00,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:06:00,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:06:00,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:06:00,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:06:00,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:06:00,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:06:00,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:06:00,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... [2020-11-28 03:06:00,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:06:00,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:06:00,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:06:00,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:06:00,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:00,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:06:00,974 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-28 03:06:00,975 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-28 03:06:00,975 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:06:00,975 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-28 03:06:00,975 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-28 03:06:00,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:06:00,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:06:01,496 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:06:01,496 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:06:01,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:06:01 BoogieIcfgContainer [2020-11-28 03:06:01,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:06:01,499 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:06:01,500 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:06:01,509 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:06:01,509 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:06:01,510 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:06:00" (1/3) ... [2020-11-28 03:06:01,511 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2e01a09a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:06:01, skipping insertion in model container [2020-11-28 03:06:01,511 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:06:01,511 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:00" (2/3) ... [2020-11-28 03:06:01,512 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2e01a09a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:06:01, skipping insertion in model container [2020-11-28 03:06:01,512 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:06:01,512 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:06:01" (3/3) ... [2020-11-28 03:06:01,514 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-11-28 03:06:01,578 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:06:01,579 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:06:01,579 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:06:01,579 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:06:01,579 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:06:01,579 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:06:01,580 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:06:01,580 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:06:01,596 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-28 03:06:01,623 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:01,624 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:01,624 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:01,632 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:06:01,633 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:01,633 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:06:01,633 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-28 03:06:01,637 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:01,637 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:01,638 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:01,638 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:06:01,639 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:01,647 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-11-28 03:06:01,648 INFO L796 eck$LassoCheckResult]: Loop: 27#fibo1ENTRYtrue ~n := #in~n; 4#L10true assume !(~n < 1); 10#L12true assume !(1 == ~n); 13#L15true call #t~ret7 := fibo2(~n - 1);< 15#fibo2ENTRYtrue ~n := #in~n; 28#L20true assume !(~n < 1); 20#L22true assume !(1 == ~n); 9#L25true call #t~ret9 := fibo1(~n - 1);< 27#fibo1ENTRYtrue [2020-11-28 03:06:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:01,655 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-11-28 03:06:01,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:01,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879180194] [2020-11-28 03:06:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:01,778 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:01,797 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:01,818 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-11-28 03:06:01,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:01,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814178328] [2020-11-28 03:06:01,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:01,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:01,837 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:01,839 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-11-28 03:06:01,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:01,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802962038] [2020-11-28 03:06:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:01,864 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:01,884 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:01,891 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:02,141 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:02,142 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:02,142 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:02,142 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:02,143 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:02,143 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:02,144 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:02,144 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:02,144 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration1_Loop [2020-11-28 03:06:02,145 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:02,145 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:02,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,179 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,204 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,331 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:02,332 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:02,342 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:02,342 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:02,353 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:02,353 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:02,400 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:02,400 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:02,404 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:02,404 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:02,435 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:02,435 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:02,439 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:02,439 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:02,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:02,480 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:02,484 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:02,484 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:02,524 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:02,524 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:02,528 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:02,528 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:02,573 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:02,573 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:02,577 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:02,577 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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) [2020-11-28 03:06:02,620 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:02,620 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:02,624 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:02,624 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:02,653 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:02,654 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:02,657 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:02,657 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:02,685 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:02,685 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:02,711 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:02,711 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:02,801 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:02,803 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:02,804 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:02,804 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:02,804 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:02,804 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:02,804 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:02,804 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:02,804 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:02,804 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration1_Loop [2020-11-28 03:06:02,805 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:02,805 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:02,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,841 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:02,991 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:02,997 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:03,006 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:03,009 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:03,009 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:03,010 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:03,010 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:03,010 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:03,013 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:03,013 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:03,015 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:03,057 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:03,060 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:03,060 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:03,060 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:03,060 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:03,060 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:03,061 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:03,061 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:03,063 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:03,100 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:03,102 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:03,102 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:03,103 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:03,103 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:03,103 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:03,104 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:03,104 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:03,105 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:03,139 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:03,141 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:03,141 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:03,141 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:03,141 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:03,141 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:03,142 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:03,143 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:03,146 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:03,171 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:03,173 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:03,173 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:03,174 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:03,174 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:03,174 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:03,174 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:03,175 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:03,181 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:03,205 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:03,207 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:03,207 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:03,207 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:03,207 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:03,207 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:03,208 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:03,208 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:03,210 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:03,233 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:03,235 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:03,235 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:03,235 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:03,235 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:03,235 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:03,236 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:03,237 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:03,238 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:03,261 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:03,263 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:03,263 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:03,263 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:03,263 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:03,263 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:03,264 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:03,264 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:03,269 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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) [2020-11-28 03:06:03,308 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 [2020-11-28 03:06:03,318 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:03,319 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:03,319 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:03,319 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:03,319 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:03,320 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:03,321 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:03,325 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:03,341 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:06:03,342 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:03,350 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:03,350 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:03,351 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:03,351 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:03,377 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:06:03,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:03,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:03,591 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-11-28 03:06:03,593 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-11-28 03:06:03,933 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states.. Second operand 6 states. Result 85 states and 117 transitions. Complement of second has 24 states. [2020-11-28 03:06:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:03,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-28 03:06:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-11-28 03:06:03,942 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-28 03:06:03,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:03,944 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-11-28 03:06:03,944 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:03,946 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-11-28 03:06:03,948 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:03,948 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-11-28 03:06:03,968 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:03,976 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-11-28 03:06:03,978 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-11-28 03:06:03,979 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-11-28 03:06:03,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-11-28 03:06:03,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:03,981 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-11-28 03:06:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-11-28 03:06:04,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-11-28 03:06:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:06:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-11-28 03:06:04,041 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-28 03:06:04,041 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-28 03:06:04,041 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:06:04,042 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-11-28 03:06:04,047 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:04,047 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:04,047 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:04,050 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:04,050 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:04,050 INFO L794 eck$LassoCheckResult]: Stem: 234#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 230#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 216#L39 call main_#t~ret11 := fibo1(main_~x~0);< 222#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 217#L12 assume !(1 == ~n); 201#L15 call #t~ret7 := fibo2(~n - 1);< 233#fibo2ENTRY ~n := #in~n; 237#L20 assume !(~n < 1); 251#L22 assume !(1 == ~n); 212#L25 call #t~ret9 := fibo1(~n - 1);< 227#fibo1ENTRY ~n := #in~n; 211#L10 assume ~n < 1;#res := 0; 213#fibo1FINAL assume true; 220#fibo1EXIT >#48#return; 221#L25-1 [2020-11-28 03:06:04,051 INFO L796 eck$LassoCheckResult]: Loop: 221#L25-1 call #t~ret10 := fibo1(~n - 2);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume !(~n < 1); 247#L12 assume !(1 == ~n); 200#L15 call #t~ret7 := fibo2(~n - 1);< 239#fibo2ENTRY ~n := #in~n; 244#L20 assume !(~n < 1); 243#L22 assume !(1 == ~n); 224#L25 call #t~ret9 := fibo1(~n - 1);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume ~n < 1;#res := 0; 225#fibo1FINAL assume true; 229#fibo1EXIT >#48#return; 221#L25-1 [2020-11-28 03:06:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-11-28 03:06:04,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:04,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334216719] [2020-11-28 03:06:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:04,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:06:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:04,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334216719] [2020-11-28 03:06:04,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:06:04,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:06:04,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782210437] [2020-11-28 03:06:04,252 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-11-28 03:06:04,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:04,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028992197] [2020-11-28 03:06:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:04,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:04,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028992197] [2020-11-28 03:06:04,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:06:04,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:06:04,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949750916] [2020-11-28 03:06:04,342 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:06:04,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:04,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:06:04,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:06:04,347 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-11-28 03:06:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:04,477 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-11-28 03:06:04,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:06:04,478 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-11-28 03:06:04,481 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:04,484 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-11-28 03:06:04,485 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-11-28 03:06:04,485 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-11-28 03:06:04,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-11-28 03:06:04,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:04,486 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-11-28 03:06:04,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-11-28 03:06:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-28 03:06:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 03:06:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-11-28 03:06:04,503 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-28 03:06:04,503 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-28 03:06:04,503 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 03:06:04,503 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-11-28 03:06:04,505 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:04,505 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:04,506 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:04,507 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:04,507 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:04,507 INFO L794 eck$LassoCheckResult]: Stem: 375#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 374#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 355#L39 call main_#t~ret11 := fibo1(main_~x~0);< 364#fibo1ENTRY ~n := #in~n; 354#L10 assume !(~n < 1); 356#L12 assume !(1 == ~n); 346#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 399#L20 assume !(~n < 1); 400#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 371#fibo1ENTRY ~n := #in~n; 351#L10 assume !(~n < 1); 353#L12 assume 1 == ~n;#res := 1; 372#fibo1FINAL assume true; 365#fibo1EXIT >#48#return; 366#L25-1 [2020-11-28 03:06:04,508 INFO L796 eck$LassoCheckResult]: Loop: 366#L25-1 call #t~ret10 := fibo1(~n - 2);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume !(1 == ~n); 344#L15 call #t~ret7 := fibo2(~n - 1);< 388#fibo2ENTRY ~n := #in~n; 395#L20 assume !(~n < 1); 393#L22 assume !(1 == ~n); 368#L25 call #t~ret9 := fibo1(~n - 1);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume 1 == ~n;#res := 1; 369#fibo1FINAL assume true; 373#fibo1EXIT >#48#return; 366#L25-1 [2020-11-28 03:06:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:04,508 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-11-28 03:06:04,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:04,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575026547] [2020-11-28 03:06:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:04,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:06:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:04,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575026547] [2020-11-28 03:06:04,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760437823] [2020-11-28 03:06:04,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:04,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:06:04,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:04,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:04,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-28 03:06:04,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700666989] [2020-11-28 03:06:04,765 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-11-28 03:06:04,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:04,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487475028] [2020-11-28 03:06:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:04,784 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:04,802 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:04,804 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:05,061 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:05,061 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:05,062 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:05,062 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:05,062 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:05,062 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:05,062 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:05,062 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:05,062 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration3_Loop [2020-11-28 03:06:05,062 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:05,062 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:05,064 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:05,068 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:05,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:05,075 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:05,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:05,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:05,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:05,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:05,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:05,203 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:05,203 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:05,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:05,214 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:05,218 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:05,218 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:05,246 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:05,246 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:05,250 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:05,250 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:05,291 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:05,291 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:05,295 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:05,295 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:05,323 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:05,323 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:05,335 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:05,335 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:05,373 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:05,373 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:05,399 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:05,399 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:06,075 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:06,077 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:06,077 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:06,077 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:06,077 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:06,077 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:06,078 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:06,078 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:06,078 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:06,078 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration3_Loop [2020-11-28 03:06:06,078 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:06,078 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:06,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:06,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:06,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:06,106 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:06,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:06,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:06,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:06,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:06,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:06,219 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:06,219 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:06,229 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:06,231 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:06,231 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:06,231 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:06,231 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:06,231 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:06,232 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:06,232 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:06,233 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:06,256 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:06,257 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:06,257 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:06,258 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:06,258 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:06,258 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:06,258 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:06,258 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:06,259 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:06,282 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:06,283 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:06,284 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:06,284 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:06,284 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:06,284 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:06,284 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:06,285 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:06,286 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:06,312 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:06,314 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:06,314 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:06,314 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:06,314 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:06,314 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:06,316 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:06,316 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:06,318 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:06,322 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:06:06,322 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_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:06,324 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:06,324 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:06,325 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:06,325 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2020-11-28 03:06:06,348 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:06,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:06:06,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:06:06,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:06,709 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:06:06,709 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-11-28 03:06:07,290 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 10 states. Result 191 states and 263 transitions. Complement of second has 40 states. [2020-11-28 03:06:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:06:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-11-28 03:06:07,293 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-11-28 03:06:07,294 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:07,294 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-11-28 03:06:07,294 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:07,294 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-11-28 03:06:07,295 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:07,296 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-11-28 03:06:07,304 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:07,316 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-11-28 03:06:07,316 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-11-28 03:06:07,317 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-11-28 03:06:07,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-11-28 03:06:07,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:07,319 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-11-28 03:06:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-11-28 03:06:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-11-28 03:06:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 03:06:07,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-11-28 03:06:07,339 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-11-28 03:06:07,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:07,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:06:07,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:06:07,341 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-11-28 03:06:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:07,565 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-11-28 03:06:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:06:07,566 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-11-28 03:06:07,571 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:07,577 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-11-28 03:06:07,577 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-11-28 03:06:07,578 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-11-28 03:06:07,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-11-28 03:06:07,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:07,579 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-11-28 03:06:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-11-28 03:06:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-11-28 03:06:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-11-28 03:06:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-11-28 03:06:07,601 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-28 03:06:07,601 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-28 03:06:07,601 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 03:06:07,601 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-11-28 03:06:07,604 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:07,605 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:07,605 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:07,610 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-28 03:06:07,610 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 03:06:07,611 INFO L794 eck$LassoCheckResult]: Stem: 1219#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1214#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 1192#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1193#fibo1ENTRY ~n := #in~n; 1257#L10 assume !(~n < 1); 1206#L12 assume !(1 == ~n); 1159#L15 call #t~ret7 := fibo2(~n - 1);< 1216#fibo2ENTRY ~n := #in~n; 1221#L20 assume !(~n < 1); 1175#L22 assume !(1 == ~n); 1176#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume !(~n < 1); 1262#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume ~n < 1;#res := 0; 1260#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1204#L15-1 call #t~ret8 := fibo2(~n - 2);< 1223#fibo2ENTRY ~n := #in~n; 1317#L20 assume !(~n < 1); 1316#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1256#L10 assume !(~n < 1); 1263#L12 assume 1 == ~n;#res := 1; 1264#fibo1FINAL assume true; 1251#fibo1EXIT >#48#return; 1208#L25-1 call #t~ret10 := fibo1(~n - 2);< 1213#fibo1ENTRY ~n := #in~n; 1249#L10 assume !(~n < 1); 1247#L12 assume !(1 == ~n); 1212#L15 call #t~ret7 := fibo2(~n - 1);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume ~n < 1;#res := 0; 1244#fibo2FINAL assume true; 1248#fibo2EXIT >#52#return; 1211#L15-1 call #t~ret8 := fibo2(~n - 2);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume !(~n < 1); 1239#L22 assume 1 == ~n;#res := 1; 1240#fibo2FINAL assume true; 1308#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-28 03:06:07,611 INFO L796 eck$LassoCheckResult]: Loop: 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-28 03:06:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-11-28 03:06:07,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:07,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457143983] [2020-11-28 03:06:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:06:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-28 03:06:07,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-11-28 03:06:07,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457143983] [2020-11-28 03:06:07,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274614285] [2020-11-28 03:06:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:06:08,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-11-28 03:06:08,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:08,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-11-28 03:06:08,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149017880] [2020-11-28 03:06:08,465 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:08,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:08,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-11-28 03:06:08,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:08,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168743910] [2020-11-28 03:06:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-28 03:06:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-11-28 03:06:08,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168743910] [2020-11-28 03:06:08,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425625135] [2020-11-28 03:06:08,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:08,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:06:08,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 03:06:08,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:08,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-11-28 03:06:08,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675970541] [2020-11-28 03:06:08,842 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:06:08,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:08,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:06:08,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:06:08,843 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-11-28 03:06:09,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:09,142 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-11-28 03:06:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:06:09,143 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-11-28 03:06:09,149 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:09,155 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-11-28 03:06:09,155 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-11-28 03:06:09,160 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-11-28 03:06:09,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-11-28 03:06:09,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:09,161 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-11-28 03:06:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-11-28 03:06:09,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-11-28 03:06:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-28 03:06:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-11-28 03:06:09,187 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-28 03:06:09,187 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-28 03:06:09,187 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-28 03:06:09,187 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-11-28 03:06:09,190 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:09,195 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:09,196 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:09,198 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:09,198 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 03:06:09,199 INFO L794 eck$LassoCheckResult]: Stem: 2335#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2326#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 2285#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2307#fibo1ENTRY ~n := #in~n; 2284#L10 assume !(~n < 1); 2286#L12 assume !(1 == ~n); 2317#L15 call #t~ret7 := fibo2(~n - 1);< 2334#fibo2ENTRY ~n := #in~n; 2424#L20 assume !(~n < 1); 2421#L22 assume !(1 == ~n); 2316#L25 call #t~ret9 := fibo1(~n - 1);< 2318#fibo1ENTRY ~n := #in~n; 2367#L10 assume !(~n < 1); 2366#L12 assume !(1 == ~n); 2272#L15 call #t~ret7 := fibo2(~n - 1);< 2353#fibo2ENTRY ~n := #in~n; 2374#L20 assume !(~n < 1); 2372#L22 assume !(1 == ~n); 2295#L25 call #t~ret9 := fibo1(~n - 1);< 2318#fibo1ENTRY ~n := #in~n; 2375#L10 assume !(~n < 1); 2386#L12 assume 1 == ~n;#res := 1; 2387#fibo1FINAL assume true; 2448#fibo1EXIT >#48#return; 2328#L25-1 call #t~ret10 := fibo1(~n - 2);< 2327#fibo1ENTRY ~n := #in~n; 2329#L10 assume ~n < 1;#res := 0; 2451#fibo1FINAL assume true; 2450#fibo1EXIT >#50#return; 2271#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 2274#fibo2FINAL assume true; 2398#fibo2EXIT >#52#return; 2339#L15-1 [2020-11-28 03:06:09,199 INFO L796 eck$LassoCheckResult]: Loop: 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume !(1 == ~n); 2403#L25 call #t~ret9 := fibo1(~n - 1);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume !(1 == ~n); 2403#L25 call #t~ret9 := fibo1(~n - 1);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume 1 == ~n;#res := 1; 2423#fibo2FINAL assume true; 2408#fibo2EXIT >#52#return; 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume ~n < 1;#res := 0; 2425#fibo2FINAL assume true; 2428#fibo2EXIT >#54#return; 2399#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 2420#fibo1FINAL assume true; 2413#fibo1EXIT >#48#return; 2404#L25-1 call #t~ret10 := fibo1(~n - 2);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume 1 == ~n;#res := 1; 2423#fibo2FINAL assume true; 2408#fibo2EXIT >#52#return; 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume ~n < 1;#res := 0; 2425#fibo2FINAL assume true; 2428#fibo2EXIT >#54#return; 2399#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 2420#fibo1FINAL assume true; 2413#fibo1EXIT >#50#return; 2409#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 2406#fibo2FINAL assume true; 2402#fibo2EXIT >#52#return; 2339#L15-1 [2020-11-28 03:06:09,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:09,199 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-11-28 03:06:09,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:09,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327905273] [2020-11-28 03:06:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:06:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:09,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327905273] [2020-11-28 03:06:09,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957040761] [2020-11-28 03:06:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:06:09,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:09,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:09,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-28 03:06:09,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647475272] [2020-11-28 03:06:09,591 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:09,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1108085027, now seen corresponding path program 1 times [2020-11-28 03:06:09,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:09,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843953186] [2020-11-28 03:06:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-11-28 03:06:09,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843953186] [2020-11-28 03:06:09,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101394735] [2020-11-28 03:06:09,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:06:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-28 03:06:09,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:09,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-11-28 03:06:09,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217261657] [2020-11-28 03:06:09,989 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:06:09,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:09,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:06:09,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:06:09,990 INFO L87 Difference]: Start difference. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 15 states. [2020-11-28 03:06:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:10,425 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2020-11-28 03:06:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:06:10,429 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 206 states and 270 transitions. [2020-11-28 03:06:10,433 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:10,440 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 206 states to 203 states and 266 transitions. [2020-11-28 03:06:10,441 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 133 [2020-11-28 03:06:10,443 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 133 [2020-11-28 03:06:10,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 203 states and 266 transitions. [2020-11-28 03:06:10,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:10,445 INFO L691 BuchiCegarLoop]: Abstraction has 203 states and 266 transitions. [2020-11-28 03:06:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states and 266 transitions. [2020-11-28 03:06:10,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2020-11-28 03:06:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-28 03:06:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2020-11-28 03:06:10,470 INFO L714 BuchiCegarLoop]: Abstraction has 194 states and 251 transitions. [2020-11-28 03:06:10,470 INFO L594 BuchiCegarLoop]: Abstraction has 194 states and 251 transitions. [2020-11-28 03:06:10,470 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-28 03:06:10,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 194 states and 251 transitions. [2020-11-28 03:06:10,474 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:10,474 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:10,475 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:10,484 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:10,484 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 03:06:10,485 INFO L794 eck$LassoCheckResult]: Stem: 3123#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3122#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 3080#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3097#fibo1ENTRY ~n := #in~n; 3079#L10 assume !(~n < 1); 3081#L12 assume !(1 == ~n); 3090#L15 call #t~ret7 := fibo2(~n - 1);< 3130#fibo2ENTRY ~n := #in~n; 3133#L20 assume !(~n < 1); 3089#L22 assume !(1 == ~n); 3091#L25 call #t~ret9 := fibo1(~n - 1);< 3115#fibo1ENTRY ~n := #in~n; 3192#L10 assume !(~n < 1); 3191#L12 assume !(1 == ~n); 3095#L15 call #t~ret7 := fibo2(~n - 1);< 3149#fibo2ENTRY ~n := #in~n; 3180#L20 assume !(~n < 1); 3178#L22 assume !(1 == ~n); 3136#L25 call #t~ret9 := fibo1(~n - 1);< 3163#fibo1ENTRY ~n := #in~n; 3166#L10 assume !(~n < 1); 3165#L12 assume !(1 == ~n); 3094#L15 call #t~ret7 := fibo2(~n - 1);< 3149#fibo2ENTRY ~n := #in~n; 3180#L20 assume !(~n < 1); 3178#L22 assume !(1 == ~n); 3136#L25 call #t~ret9 := fibo1(~n - 1);< 3163#fibo1ENTRY ~n := #in~n; 3168#L10 assume !(~n < 1); 3186#L12 assume 1 == ~n;#res := 1; 3187#fibo1FINAL assume true; 3247#fibo1EXIT >#48#return; 3245#L25-1 call #t~ret10 := fibo1(~n - 2);< 3246#fibo1ENTRY ~n := #in~n; 3249#L10 assume ~n < 1;#res := 0; 3248#fibo1FINAL assume true; 3244#fibo1EXIT >#50#return; 3243#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 3242#fibo2FINAL assume true; 3226#fibo2EXIT >#52#return; 3113#L15-1 [2020-11-28 03:06:10,487 INFO L796 eck$LassoCheckResult]: Loop: 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume !(1 == ~n); 3109#L25 call #t~ret9 := fibo1(~n - 1);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume !(1 == ~n); 3109#L25 call #t~ret9 := fibo1(~n - 1);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume 1 == ~n;#res := 1; 3218#fibo2FINAL assume true; 3231#fibo2EXIT >#52#return; 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume ~n < 1;#res := 0; 3139#fibo2FINAL assume true; 3227#fibo2EXIT >#54#return; 3225#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 3224#fibo1FINAL assume true; 3220#fibo1EXIT >#48#return; 3127#L25-1 call #t~ret10 := fibo1(~n - 2);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume 1 == ~n;#res := 1; 3218#fibo2FINAL assume true; 3231#fibo2EXIT >#52#return; 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume ~n < 1;#res := 0; 3139#fibo2FINAL assume true; 3227#fibo2EXIT >#54#return; 3225#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 3224#fibo1FINAL assume true; 3220#fibo1EXIT >#50#return; 3221#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 3229#fibo2FINAL assume true; 3228#fibo2EXIT >#52#return; 3113#L15-1 [2020-11-28 03:06:10,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:10,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1100171425, now seen corresponding path program 2 times [2020-11-28 03:06:10,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:10,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871247167] [2020-11-28 03:06:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-28 03:06:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 03:06:10,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871247167] [2020-11-28 03:06:10,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566313669] [2020-11-28 03:06:10,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:10,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:06:10,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:06:10,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 03:06:10,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:10,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:10,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2020-11-28 03:06:10,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591306680] [2020-11-28 03:06:10,879 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:10,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:10,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1108085027, now seen corresponding path program 2 times [2020-11-28 03:06:10,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:10,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392365205] [2020-11-28 03:06:10,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:11,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:11,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-11-28 03:06:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392365205] [2020-11-28 03:06:11,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723956703] [2020-11-28 03:06:11,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:11,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:06:11,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:06:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:06:11,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-28 03:06:11,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:11,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-11-28 03:06:11,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165645280] [2020-11-28 03:06:11,219 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:06:11,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-28 03:06:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:06:11,220 INFO L87 Difference]: Start difference. First operand 194 states and 251 transitions. cyclomatic complexity: 62 Second operand 19 states. [2020-11-28 03:06:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:11,948 INFO L93 Difference]: Finished difference Result 246 states and 296 transitions. [2020-11-28 03:06:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-28 03:06:11,949 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 246 states and 296 transitions. [2020-11-28 03:06:11,954 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 24 [2020-11-28 03:06:11,958 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 246 states to 163 states and 194 transitions. [2020-11-28 03:06:11,958 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 114 [2020-11-28 03:06:11,959 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 114 [2020-11-28 03:06:11,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 194 transitions. [2020-11-28 03:06:11,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:11,966 INFO L691 BuchiCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-11-28 03:06:11,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 194 transitions. [2020-11-28 03:06:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-11-28 03:06:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-11-28 03:06:11,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2020-11-28 03:06:11,988 INFO L714 BuchiCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-11-28 03:06:11,988 INFO L594 BuchiCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-11-28 03:06:11,989 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-28 03:06:11,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 157 states and 188 transitions. [2020-11-28 03:06:11,991 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 22 [2020-11-28 03:06:11,991 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:11,991 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:11,995 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:11,995 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:11,998 INFO L794 eck$LassoCheckResult]: Stem: 4014#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4010#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 3996#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3997#fibo1ENTRY ~n := #in~n; 4046#L10 assume !(~n < 1); 4007#L12 assume !(1 == ~n); 3990#L15 call #t~ret7 := fibo2(~n - 1);< 4012#fibo2ENTRY ~n := #in~n; 4016#L20 assume !(~n < 1); 3989#L22 assume !(1 == ~n); 3975#L25 call #t~ret9 := fibo1(~n - 1);< 4005#fibo1ENTRY ~n := #in~n; 3974#L10 assume !(~n < 1); 3976#L12 assume !(1 == ~n); 4021#L15 call #t~ret7 := fibo2(~n - 1);< 4032#fibo2ENTRY ~n := #in~n; 4038#L20 assume !(~n < 1); 4034#L22 assume !(1 == ~n); 4018#L25 call #t~ret9 := fibo1(~n - 1);< 4041#fibo1ENTRY ~n := #in~n; 4042#L10 assume !(~n < 1); 4062#L12 assume !(1 == ~n); 4058#L15 call #t~ret7 := fibo2(~n - 1);< 4059#fibo2ENTRY ~n := #in~n; 4064#L20 assume !(~n < 1); 4063#L22 assume 1 == ~n;#res := 1; 4061#fibo2FINAL assume true; 4057#fibo2EXIT >#52#return; 4054#L15-1 call #t~ret8 := fibo2(~n - 2);< 4055#fibo2ENTRY ~n := #in~n; 4060#L20 assume ~n < 1;#res := 0; 4056#fibo2FINAL assume true; 4053#fibo2EXIT >#54#return; 4052#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 4048#fibo1FINAL assume true; 4045#fibo1EXIT >#48#return; 3971#L25-1 call #t~ret10 := fibo1(~n - 2);< 4043#fibo1ENTRY ~n := #in~n; 3970#L10 assume ~n < 1;#res := 0; 3972#fibo1FINAL assume true; 4006#fibo1EXIT >#50#return; 4071#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 4119#fibo2FINAL assume true; 4110#fibo2EXIT >#52#return; 3966#L15-1 call #t~ret8 := fibo2(~n - 2);< 4083#fibo2ENTRY [2020-11-28 03:06:11,998 INFO L796 eck$LassoCheckResult]: Loop: 4083#fibo2ENTRY ~n := #in~n; 4084#L20 assume !(~n < 1); 4077#L22 assume !(1 == ~n); 4070#L25 call #t~ret9 := fibo1(~n - 1);< 4075#fibo1ENTRY ~n := #in~n; 4103#L10 assume !(~n < 1); 4101#L12 assume !(1 == ~n); 3965#L15 call #t~ret7 := fibo2(~n - 1);< 4083#fibo2ENTRY [2020-11-28 03:06:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:11,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1560322136, now seen corresponding path program 1 times [2020-11-28 03:06:11,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:12,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526993363] [2020-11-28 03:06:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:12,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:06:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:12,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:12,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:12,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:12,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 03:06:12,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526993363] [2020-11-28 03:06:12,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803343784] [2020-11-28 03:06:12,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:12,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:06:12,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:12,523 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:06:12,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:12,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2020-11-28 03:06:12,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32708611] [2020-11-28 03:06:12,524 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:12,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-11-28 03:06:12,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:12,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391892895] [2020-11-28 03:06:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:12,527 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:12,529 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:12,530 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:12,643 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:12,644 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:12,644 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:12,644 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:12,644 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:12,644 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:12,644 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:12,644 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:12,644 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration7_Loop [2020-11-28 03:06:12,644 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:12,644 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:12,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,776 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:12,776 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:12,785 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:12,785 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:12,811 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:12,811 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:12,871 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:12,873 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:12,873 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:12,873 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:12,873 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:12,873 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:12,873 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:12,873 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:12,873 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:12,874 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration7_Loop [2020-11-28 03:06:12,874 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:12,874 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:12,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,901 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,908 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,911 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:12,985 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:12,985 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:12,990 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:12,992 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:12,992 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:12,992 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:12,992 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:12,992 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:12,994 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:12,994 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:12,996 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:13,026 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:13,028 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:13,028 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:13,029 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:13,029 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:13,029 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:13,030 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:13,030 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:13,031 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:13,059 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:13,060 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:13,061 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:13,061 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:13,061 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:13,061 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:13,062 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:13,062 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:13,063 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:13,065 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:06:13,065 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:13,068 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:13,068 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:13,068 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:13,068 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2020-11-28 03:06:13,089 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:13,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:13,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:13,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:13,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:13,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:13,346 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:13,346 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-11-28 03:06:13,525 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 225 states and 264 transitions. Complement of second has 16 states. [2020-11-28 03:06:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2020-11-28 03:06:13,528 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 26 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-28 03:06:13,528 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:13,528 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:13,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:13,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:13,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:13,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:13,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:13,778 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:13,779 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-11-28 03:06:13,937 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 225 states and 264 transitions. Complement of second has 16 states. [2020-11-28 03:06:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2020-11-28 03:06:13,939 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 26 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-28 03:06:13,939 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:13,939 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:13,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:14,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:14,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:14,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:14,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:14,202 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:14,202 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-11-28 03:06:14,455 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 314 states and 366 transitions. Complement of second has 23 states. [2020-11-28 03:06:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:14,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-28 03:06:14,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-28 03:06:14,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:14,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2020-11-28 03:06:14,458 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:14,458 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 16 letters. [2020-11-28 03:06:14,459 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:14,459 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 314 states and 366 transitions. [2020-11-28 03:06:14,464 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 46 [2020-11-28 03:06:14,470 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 314 states to 234 states and 279 transitions. [2020-11-28 03:06:14,470 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 132 [2020-11-28 03:06:14,471 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2020-11-28 03:06:14,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 234 states and 279 transitions. [2020-11-28 03:06:14,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:14,471 INFO L691 BuchiCegarLoop]: Abstraction has 234 states and 279 transitions. [2020-11-28 03:06:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states and 279 transitions. [2020-11-28 03:06:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 215. [2020-11-28 03:06:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-11-28 03:06:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2020-11-28 03:06:14,494 INFO L714 BuchiCegarLoop]: Abstraction has 215 states and 255 transitions. [2020-11-28 03:06:14,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-28 03:06:14,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:06:14,495 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand 17 states. [2020-11-28 03:06:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:14,959 INFO L93 Difference]: Finished difference Result 220 states and 258 transitions. [2020-11-28 03:06:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 03:06:14,960 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 220 states and 258 transitions. [2020-11-28 03:06:14,963 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 40 [2020-11-28 03:06:14,967 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 220 states to 218 states and 256 transitions. [2020-11-28 03:06:14,967 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-11-28 03:06:14,968 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-11-28 03:06:14,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 218 states and 256 transitions. [2020-11-28 03:06:14,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:14,970 INFO L691 BuchiCegarLoop]: Abstraction has 218 states and 256 transitions. [2020-11-28 03:06:14,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states and 256 transitions. [2020-11-28 03:06:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2020-11-28 03:06:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-28 03:06:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 248 transitions. [2020-11-28 03:06:14,988 INFO L714 BuchiCegarLoop]: Abstraction has 210 states and 248 transitions. [2020-11-28 03:06:14,988 INFO L594 BuchiCegarLoop]: Abstraction has 210 states and 248 transitions. [2020-11-28 03:06:14,988 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-28 03:06:14,988 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 210 states and 248 transitions. [2020-11-28 03:06:14,990 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 40 [2020-11-28 03:06:14,991 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:14,991 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:14,992 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:14,992 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:14,993 INFO L794 eck$LassoCheckResult]: Stem: 6182#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 6181#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 6152#L39 call main_#t~ret11 := fibo1(main_~x~0);< 6153#fibo1ENTRY ~n := #in~n; 6262#L10 assume !(~n < 1); 6261#L12 assume !(1 == ~n); 6257#L15 call #t~ret7 := fibo2(~n - 1);< 6260#fibo2ENTRY ~n := #in~n; 6259#L20 assume !(~n < 1); 6258#L22 assume !(1 == ~n); 6250#L25 call #t~ret9 := fibo1(~n - 1);< 6256#fibo1ENTRY ~n := #in~n; 6254#L10 assume !(~n < 1); 6252#L12 assume !(1 == ~n); 6129#L15 call #t~ret7 := fibo2(~n - 1);< 6209#fibo2ENTRY ~n := #in~n; 6248#L20 assume !(~n < 1); 6243#L22 assume !(1 == ~n); 6196#L25 call #t~ret9 := fibo1(~n - 1);< 6220#fibo1ENTRY ~n := #in~n; 6236#L10 assume !(~n < 1); 6235#L12 assume !(1 == ~n); 6232#L15 call #t~ret7 := fibo2(~n - 1);< 6233#fibo2ENTRY ~n := #in~n; 6240#L20 assume !(~n < 1); 6239#L22 assume 1 == ~n;#res := 1; 6238#fibo2FINAL assume true; 6231#fibo2EXIT >#52#return; 6228#L15-1 call #t~ret8 := fibo2(~n - 2);< 6229#fibo2ENTRY ~n := #in~n; 6234#L20 assume ~n < 1;#res := 0; 6230#fibo2FINAL assume true; 6227#fibo2EXIT >#54#return; 6226#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 6225#fibo1FINAL assume true; 6219#fibo1EXIT >#48#return; 6211#L25-1 call #t~ret10 := fibo1(~n - 2);< 6180#fibo1ENTRY ~n := #in~n; 6215#L10 assume !(~n < 1); 6213#L12 assume !(1 == ~n); 6166#L15 call #t~ret7 := fibo2(~n - 1);< 6210#fibo2ENTRY ~n := #in~n; 6207#L20 assume !(~n < 1); 6203#L22 assume 1 == ~n;#res := 1; 6204#fibo2FINAL assume true; 6291#fibo2EXIT >#52#return; 6141#L15-1 [2020-11-28 03:06:14,993 INFO L796 eck$LassoCheckResult]: Loop: 6141#L15-1 call #t~ret8 := fibo2(~n - 2);< 6284#fibo2ENTRY ~n := #in~n; 6286#L20 assume !(~n < 1); 6279#L22 assume !(1 == ~n); 6138#L25 call #t~ret9 := fibo1(~n - 1);< 6184#fibo1ENTRY ~n := #in~n; 6137#L10 assume !(~n < 1); 6139#L12 assume !(1 == ~n); 6270#L15 call #t~ret7 := fibo2(~n - 1);< 6186#fibo2ENTRY ~n := #in~n; 6293#L20 assume !(~n < 1); 6302#L22 assume 1 == ~n;#res := 1; 6301#fibo2FINAL assume true; 6290#fibo2EXIT >#52#return; 6141#L15-1 [2020-11-28 03:06:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:14,994 INFO L82 PathProgramCache]: Analyzing trace with hash -663651953, now seen corresponding path program 1 times [2020-11-28 03:06:14,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:14,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256128066] [2020-11-28 03:06:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:06:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-28 03:06:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-28 03:06:15,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256128066] [2020-11-28 03:06:15,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363988308] [2020-11-28 03:06:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:15,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:06:15,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 03:06:15,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:15,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-11-28 03:06:15,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747998150] [2020-11-28 03:06:15,318 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-11-28 03:06:15,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:15,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522146287] [2020-11-28 03:06:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:15,324 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:15,328 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:15,334 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:15,523 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:15,523 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:15,523 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:15,523 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:15,523 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:15,523 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:15,523 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:15,523 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:15,523 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration8_Loop [2020-11-28 03:06:15,523 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:15,524 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:15,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:15,541 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:15,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:15,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:15,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:15,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:15,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:15,568 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:15,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:15,635 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:15,635 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:15,637 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:15,637 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:15,640 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:15,640 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:15,663 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:15,664 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:15,666 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:15,666 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:15,690 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:15,690 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:15,692 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:15,692 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:15,714 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:15,714 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:15,721 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:15,721 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:15,750 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:15,750 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:15,752 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:15,752 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:15,776 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:15,776 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:15,779 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:15,779 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:15,805 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:15,805 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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) [2020-11-28 03:06:15,862 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:15,862 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:16,862 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:16,863 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:16,864 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:16,864 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:16,864 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:16,864 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:16,864 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:16,864 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:16,864 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:16,864 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration8_Loop [2020-11-28 03:06:16,864 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:16,864 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:16,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:16,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:16,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:16,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:16,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:16,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:16,883 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:16,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:16,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:16,952 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:16,952 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:16,961 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:16,963 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:16,963 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:16,963 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:16,963 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:16,963 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:16,963 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:16,964 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:16,965 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:16,987 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:16,988 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:16,988 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:16,988 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:16,988 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:16,988 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:16,989 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:16,989 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:16,990 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,013 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:17,014 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:17,014 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:17,014 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:17,014 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:17,014 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:17,015 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:17,015 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:17,016 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,043 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:17,044 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:17,044 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:17,044 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:17,044 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:17,044 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:17,045 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:17,045 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:17,046 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,072 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:17,074 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:17,074 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:17,074 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:17,074 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:17,074 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:17,075 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:17,075 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:17,076 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,107 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:17,108 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:17,108 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:17,109 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:17,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:17,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:17,109 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:17,109 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:17,110 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,132 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:17,134 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:17,134 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:17,134 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:17,134 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:17,134 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:17,135 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:17,135 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:17,136 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,160 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:17,162 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:17,162 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:17,162 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:17,162 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:17,162 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:17,163 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:17,164 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:17,173 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:17,178 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:06:17,178 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_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,180 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:17,180 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:17,181 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:17,181 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-11-28 03:06:17,201 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:17,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:17,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:17,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:17,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:06:17,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:17,479 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:06:17,479 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-11-28 03:06:17,954 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 608 states and 688 transitions. Complement of second has 40 states. [2020-11-28 03:06:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:06:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 54 transitions. [2020-11-28 03:06:17,958 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-28 03:06:17,959 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:17,959 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:18,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:18,237 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:06:18,237 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-11-28 03:06:18,577 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 260 states and 302 transitions. Complement of second has 26 states. [2020-11-28 03:06:18,578 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 [2020-11-28 03:06:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:06:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 31 transitions. [2020-11-28 03:06:18,579 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 31 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-28 03:06:18,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:18,579 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:18,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:18,886 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 8 loop predicates [2020-11-28 03:06:18,886 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-11-28 03:06:19,355 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 1187 states and 1346 transitions. Complement of second has 102 states. [2020-11-28 03:06:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:06:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 71 transitions. [2020-11-28 03:06:19,358 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-28 03:06:19,360 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:19,360 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 60 letters. Loop has 14 letters. [2020-11-28 03:06:19,361 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:19,361 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 46 letters. Loop has 28 letters. [2020-11-28 03:06:19,363 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:19,363 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1187 states and 1346 transitions. [2020-11-28 03:06:19,379 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 124 [2020-11-28 03:06:19,387 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1187 states to 613 states and 697 transitions. [2020-11-28 03:06:19,388 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 287 [2020-11-28 03:06:19,389 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 313 [2020-11-28 03:06:19,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 613 states and 697 transitions. [2020-11-28 03:06:19,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:19,389 INFO L691 BuchiCegarLoop]: Abstraction has 613 states and 697 transitions. [2020-11-28 03:06:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states and 697 transitions. [2020-11-28 03:06:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 547. [2020-11-28 03:06:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-11-28 03:06:19,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 618 transitions. [2020-11-28 03:06:19,409 INFO L714 BuchiCegarLoop]: Abstraction has 547 states and 618 transitions. [2020-11-28 03:06:19,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:19,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 03:06:19,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:06:19,410 INFO L87 Difference]: Start difference. First operand 547 states and 618 transitions. Second operand 16 states. [2020-11-28 03:06:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:19,797 INFO L93 Difference]: Finished difference Result 373 states and 416 transitions. [2020-11-28 03:06:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 03:06:19,798 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 373 states and 416 transitions. [2020-11-28 03:06:19,802 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:06:19,806 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 373 states to 258 states and 292 transitions. [2020-11-28 03:06:19,806 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 149 [2020-11-28 03:06:19,806 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 165 [2020-11-28 03:06:19,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 258 states and 292 transitions. [2020-11-28 03:06:19,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:19,807 INFO L691 BuchiCegarLoop]: Abstraction has 258 states and 292 transitions. [2020-11-28 03:06:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states and 292 transitions. [2020-11-28 03:06:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2020-11-28 03:06:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-11-28 03:06:19,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2020-11-28 03:06:19,815 INFO L714 BuchiCegarLoop]: Abstraction has 255 states and 286 transitions. [2020-11-28 03:06:19,815 INFO L594 BuchiCegarLoop]: Abstraction has 255 states and 286 transitions. [2020-11-28 03:06:19,815 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-28 03:06:19,816 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 255 states and 286 transitions. [2020-11-28 03:06:19,818 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:06:19,818 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:19,818 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:19,819 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:19,820 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:19,820 INFO L794 eck$LassoCheckResult]: Stem: 10359#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10358#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 10333#L39 call main_#t~ret11 := fibo1(main_~x~0);< 10334#fibo1ENTRY ~n := #in~n; 10462#L10 assume !(~n < 1); 10461#L12 assume !(1 == ~n); 10443#L15 call #t~ret7 := fibo2(~n - 1);< 10460#fibo2ENTRY ~n := #in~n; 10459#L20 assume !(~n < 1); 10458#L22 assume !(1 == ~n); 10454#L25 call #t~ret9 := fibo1(~n - 1);< 10457#fibo1ENTRY ~n := #in~n; 10456#L10 assume !(~n < 1); 10455#L12 assume !(1 == ~n); 10450#L15 call #t~ret7 := fibo2(~n - 1);< 10453#fibo2ENTRY ~n := #in~n; 10452#L20 assume !(~n < 1); 10451#L22 assume !(1 == ~n); 10362#L25 call #t~ret9 := fibo1(~n - 1);< 10449#fibo1ENTRY ~n := #in~n; 10448#L10 assume !(~n < 1); 10447#L12 assume !(1 == ~n); 10361#L15 call #t~ret7 := fibo2(~n - 1);< 10363#fibo2ENTRY ~n := #in~n; 10470#L20 assume !(~n < 1); 10469#L22 assume 1 == ~n;#res := 1; 10465#fibo2FINAL assume true; 10463#fibo2EXIT >#52#return; 10464#L15-1 call #t~ret8 := fibo2(~n - 2);< 10497#fibo2ENTRY ~n := #in~n; 10514#L20 assume ~n < 1;#res := 0; 10513#fibo2FINAL assume true; 10496#fibo2EXIT >#54#return; 10495#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 10493#fibo1FINAL assume true; 10490#fibo1EXIT >#48#return; 10486#L25-1 call #t~ret10 := fibo1(~n - 2);< 10487#fibo1ENTRY ~n := #in~n; 10494#L10 assume !(~n < 1); 10492#L12 assume 1 == ~n;#res := 1; 10489#fibo1FINAL assume true; 10485#fibo1EXIT >#50#return; 10483#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 10482#fibo2FINAL assume true; 10481#fibo2EXIT >#52#return; 10419#L15-1 call #t~ret8 := fibo2(~n - 2);< 10477#fibo2ENTRY ~n := #in~n; 10519#L20 assume ~n < 1;#res := 0; 10520#fibo2FINAL assume true; 10547#fibo2EXIT >#54#return; 10476#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 10478#fibo1FINAL assume true; 10472#fibo1EXIT >#48#return; 10445#L25-1 call #t~ret10 := fibo1(~n - 2);< 10350#fibo1ENTRY ~n := #in~n; 10506#L10 assume !(~n < 1); 10504#L12 assume !(1 == ~n); 10444#L15 call #t~ret7 := fibo2(~n - 1);< 10446#fibo2ENTRY [2020-11-28 03:06:19,821 INFO L796 eck$LassoCheckResult]: Loop: 10446#fibo2ENTRY ~n := #in~n; 10510#L20 assume !(~n < 1); 10508#L22 assume !(1 == ~n); 10336#L25 call #t~ret9 := fibo1(~n - 1);< 10507#fibo1ENTRY ~n := #in~n; 10505#L10 assume !(~n < 1); 10502#L12 assume !(1 == ~n); 10475#L15 call #t~ret7 := fibo2(~n - 1);< 10446#fibo2ENTRY [2020-11-28 03:06:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:19,822 INFO L82 PathProgramCache]: Analyzing trace with hash -246198455, now seen corresponding path program 2 times [2020-11-28 03:06:19,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:19,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817313783] [2020-11-28 03:06:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:06:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:06:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 03:06:20,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817313783] [2020-11-28 03:06:20,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667883187] [2020-11-28 03:06:20,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:20,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:06:20,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:06:20,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:06:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-28 03:06:20,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:20,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-11-28 03:06:20,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630501912] [2020-11-28 03:06:20,146 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 3 times [2020-11-28 03:06:20,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:20,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580359811] [2020-11-28 03:06:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:20,149 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:20,151 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:20,152 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:20,241 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:20,241 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:20,241 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:20,241 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:20,241 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:20,241 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,241 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:20,241 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:20,241 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration9_Loop [2020-11-28 03:06:20,241 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:20,241 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:20,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,253 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,325 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:20,325 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,328 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,328 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,330 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,331 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,353 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,353 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,355 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,355 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,377 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,377 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,380 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,380 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,405 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,405 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,407 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,407 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,428 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,429 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,431 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,431 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,452 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,452 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,475 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:20,475 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,497 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:20,498 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:20,498 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:20,498 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:20,499 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:20,499 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:20,499 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,499 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:20,499 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:20,499 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration9_Loop [2020-11-28 03:06:20,499 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:20,499 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:20,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,504 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,513 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,515 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,589 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:20,589 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:20,591 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:20,593 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:20,593 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:20,593 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:20,593 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:20,593 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:20,594 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:20,594 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:20,595 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:20,616 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:20,618 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:20,618 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:20,618 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:20,618 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:20,618 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:20,619 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:20,619 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:20,620 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:20,641 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:20,642 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:20,642 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:20,642 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:20,642 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:20,642 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:20,643 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:20,643 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:20,644 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:20,665 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:20,667 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:20,667 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:20,667 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:20,667 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:20,667 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:20,667 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:20,667 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:20,669 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:20,693 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:20,694 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:20,694 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:20,694 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:20,694 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:20,694 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:20,695 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:20,695 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:20,696 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,718 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:20,719 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:20,720 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:20,720 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:20,720 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:20,720 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:20,720 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:20,721 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:20,722 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,758 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:20,759 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:20,759 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:20,759 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:20,760 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:20,760 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:20,760 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:20,760 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:20,761 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,784 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:20,785 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:20,785 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:20,785 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:20,785 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:20,785 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:20,786 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:20,786 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:20,788 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:20,791 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:06:20,791 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_46de6b59-d1ef-409c-a055-4690d7483769/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 [2020-11-28 03:06:20,795 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:20,795 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:20,796 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:20,796 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2020-11-28 03:06:20,816 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:20,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 03:06:20,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:20,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:20,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:20,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:20,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:20,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:20,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:20,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:20,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:21,060 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:21,060 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-11-28 03:06:21,232 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 273 states and 304 transitions. Complement of second has 15 states. [2020-11-28 03:06:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2020-11-28 03:06:21,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 58 letters. Loop has 8 letters. [2020-11-28 03:06:21,234 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:21,234 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:21,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 03:06:21,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:21,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:21,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:21,476 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:21,476 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-11-28 03:06:21,618 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 273 states and 304 transitions. Complement of second has 15 states. [2020-11-28 03:06:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2020-11-28 03:06:21,620 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 58 letters. Loop has 8 letters. [2020-11-28 03:06:21,620 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:21,620 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:21,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 03:06:21,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:21,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,745 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,749 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:21,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:21,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:21,856 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:21,856 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-11-28 03:06:22,088 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 393 states and 429 transitions. Complement of second has 25 states. [2020-11-28 03:06:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2020-11-28 03:06:22,093 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 58 letters. Loop has 8 letters. [2020-11-28 03:06:22,093 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:22,093 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 66 letters. Loop has 8 letters. [2020-11-28 03:06:22,095 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:22,095 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 58 letters. Loop has 16 letters. [2020-11-28 03:06:22,096 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:22,096 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 393 states and 429 transitions. [2020-11-28 03:06:22,100 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2020-11-28 03:06:22,105 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 393 states to 277 states and 306 transitions. [2020-11-28 03:06:22,105 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2020-11-28 03:06:22,106 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 170 [2020-11-28 03:06:22,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 277 states and 306 transitions. [2020-11-28 03:06:22,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:22,106 INFO L691 BuchiCegarLoop]: Abstraction has 277 states and 306 transitions. [2020-11-28 03:06:22,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states and 306 transitions. [2020-11-28 03:06:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2020-11-28 03:06:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-11-28 03:06:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2020-11-28 03:06:22,116 INFO L714 BuchiCegarLoop]: Abstraction has 263 states and 292 transitions. [2020-11-28 03:06:22,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:22,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:06:22,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:06:22,117 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand 15 states. [2020-11-28 03:06:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:22,548 INFO L93 Difference]: Finished difference Result 272 states and 304 transitions. [2020-11-28 03:06:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:06:22,549 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 272 states and 304 transitions. [2020-11-28 03:06:22,553 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-11-28 03:06:22,556 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 272 states to 269 states and 301 transitions. [2020-11-28 03:06:22,556 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 164 [2020-11-28 03:06:22,557 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2020-11-28 03:06:22,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 269 states and 301 transitions. [2020-11-28 03:06:22,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:22,557 INFO L691 BuchiCegarLoop]: Abstraction has 269 states and 301 transitions. [2020-11-28 03:06:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states and 301 transitions. [2020-11-28 03:06:22,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 264. [2020-11-28 03:06:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-11-28 03:06:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 292 transitions. [2020-11-28 03:06:22,565 INFO L714 BuchiCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-11-28 03:06:22,566 INFO L594 BuchiCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-11-28 03:06:22,566 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-28 03:06:22,566 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 264 states and 292 transitions. [2020-11-28 03:06:22,568 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-11-28 03:06:22,568 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:22,568 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:22,569 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:22,570 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:22,570 INFO L794 eck$LassoCheckResult]: Stem: 13105#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13097#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 13071#L39 call main_#t~ret11 := fibo1(main_~x~0);< 13072#fibo1ENTRY ~n := #in~n; 13226#L10 assume !(~n < 1); 13224#L12 assume !(1 == ~n); 13216#L15 call #t~ret7 := fibo2(~n - 1);< 13219#fibo2ENTRY ~n := #in~n; 13218#L20 assume !(~n < 1); 13217#L22 assume !(1 == ~n); 13212#L25 call #t~ret9 := fibo1(~n - 1);< 13215#fibo1ENTRY ~n := #in~n; 13214#L10 assume !(~n < 1); 13213#L12 assume !(1 == ~n); 13041#L15 call #t~ret7 := fibo2(~n - 1);< 13207#fibo2ENTRY ~n := #in~n; 13202#L20 assume !(~n < 1); 13200#L22 assume !(1 == ~n); 13192#L25 call #t~ret9 := fibo1(~n - 1);< 13199#fibo1ENTRY ~n := #in~n; 13197#L10 assume !(~n < 1); 13195#L12 assume !(1 == ~n); 13189#L15 call #t~ret7 := fibo2(~n - 1);< 13193#fibo2ENTRY ~n := #in~n; 13198#L20 assume !(~n < 1); 13196#L22 assume 1 == ~n;#res := 1; 13194#fibo2FINAL assume true; 13188#fibo2EXIT >#52#return; 13190#L15-1 call #t~ret8 := fibo2(~n - 2);< 13278#fibo2ENTRY ~n := #in~n; 13280#L20 assume ~n < 1;#res := 0; 13279#fibo2FINAL assume true; 13277#fibo2EXIT >#54#return; 13275#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 13273#fibo1FINAL assume true; 13272#fibo1EXIT >#48#return; 13089#L25-1 call #t~ret10 := fibo1(~n - 2);< 13090#fibo1ENTRY ~n := #in~n; 13284#L10 assume !(~n < 1); 13283#L12 assume 1 == ~n;#res := 1; 13271#fibo1FINAL assume true; 13269#fibo1EXIT >#50#return; 13040#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 13042#fibo2FINAL assume true; 13255#fibo2EXIT >#52#return; 13084#L15-1 call #t~ret8 := fibo2(~n - 2);< 13156#fibo2ENTRY ~n := #in~n; 13158#L20 assume !(~n < 1); 13152#L22 assume !(1 == ~n); 13144#L25 call #t~ret9 := fibo1(~n - 1);< 13151#fibo1ENTRY ~n := #in~n; 13150#L10 assume !(~n < 1); 13143#L12 assume !(1 == ~n); 13064#L15 call #t~ret7 := fibo2(~n - 1);< 13185#fibo2ENTRY ~n := #in~n; 13187#L20 assume !(~n < 1); 13062#L22 assume !(1 == ~n); 13065#L25 call #t~ret9 := fibo1(~n - 1);< 13182#fibo1ENTRY ~n := #in~n; 13180#L10 assume !(~n < 1); 13178#L12 assume !(1 == ~n); 13175#L15 [2020-11-28 03:06:22,570 INFO L796 eck$LassoCheckResult]: Loop: 13175#L15 call #t~ret7 := fibo2(~n - 1);< 13176#fibo2ENTRY ~n := #in~n; 13183#L20 assume !(~n < 1); 13184#L22 assume !(1 == ~n); 13172#L25 call #t~ret9 := fibo1(~n - 1);< 13182#fibo1ENTRY ~n := #in~n; 13180#L10 assume !(~n < 1); 13178#L12 assume !(1 == ~n); 13175#L15 [2020-11-28 03:06:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1632318521, now seen corresponding path program 3 times [2020-11-28 03:06:22,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:22,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091113298] [2020-11-28 03:06:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:06:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 03:06:22,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091113298] [2020-11-28 03:06:22,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263830171] [2020-11-28 03:06:22,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:22,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-28 03:06:22,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:06:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 03:06:22,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 03:06:22,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:22,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 18 [2020-11-28 03:06:22,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950412158] [2020-11-28 03:06:22,951 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:22,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1544065082, now seen corresponding path program 4 times [2020-11-28 03:06:22,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:22,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816028721] [2020-11-28 03:06:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:22,955 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:22,957 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:22,958 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:23,111 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:23,112 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:23,112 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:23,112 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:23,112 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:23,112 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:23,112 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:23,112 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:23,112 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration10_Loop [2020-11-28 03:06:23,112 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:23,112 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:23,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:23,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:23,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:23,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:23,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:23,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:23,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:23,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:23,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:23,256 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:23,256 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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) [2020-11-28 03:06:23,262 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:23,262 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/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) [2020-11-28 03:06:23,314 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:23,314 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,889 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:25,891 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:25,891 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:25,891 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:25,892 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:25,892 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:25,892 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,892 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:25,892 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:25,892 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration10_Loop [2020-11-28 03:06:25,892 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:25,892 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:25,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:26,012 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:26,013 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:26,023 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:26,024 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:26,024 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:26,024 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:26,024 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:26,024 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:26,038 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:26,038 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:26,041 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:26,045 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:06:26,045 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_46de6b59-d1ef-409c-a055-4690d7483769/bin/uautomizer/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:26,053 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:26,053 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:26,053 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:26,053 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-11-28 03:06:26,089 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:26,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 03:06:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:26,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:26,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:26,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:26,345 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 [2020-11-28 03:06:26,345 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-11-28 03:06:26,487 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2020-11-28 03:06:26,589 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 288 states and 316 transitions. Complement of second has 19 states. [2020-11-28 03:06:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 03:06:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2020-11-28 03:06:26,594 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 61 letters. Loop has 8 letters. [2020-11-28 03:06:26,594 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:26,594 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:26,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:26,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 03:06:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:26,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,768 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:26,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:26,891 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 [2020-11-28 03:06:26,891 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-11-28 03:06:27,091 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 288 states and 316 transitions. Complement of second has 21 states. [2020-11-28 03:06:27,092 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 [2020-11-28 03:06:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 03:06:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2020-11-28 03:06:27,093 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 61 letters. Loop has 8 letters. [2020-11-28 03:06:27,093 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:27,093 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 03:06:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:27,244 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:27,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:27,248 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:27,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:27,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:27,397 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 [2020-11-28 03:06:27,397 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-11-28 03:06:27,609 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 606 states and 695 transitions. Complement of second has 33 states. [2020-11-28 03:06:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 03:06:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-28 03:06:27,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 61 letters. Loop has 8 letters. [2020-11-28 03:06:27,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:27,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-28 03:06:27,612 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:27,612 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 61 letters. Loop has 16 letters. [2020-11-28 03:06:27,613 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:27,614 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 606 states and 695 transitions. [2020-11-28 03:06:27,621 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:06:27,622 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 606 states to 0 states and 0 transitions. [2020-11-28 03:06:27,622 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 03:06:27,622 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 03:06:27,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 03:06:27,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:06:27,623 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:27,623 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:27,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:27,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-28 03:06:27,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:06:27,624 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 18 states. [2020-11-28 03:06:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:27,624 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-11-28 03:06:27,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:06:27,625 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-11-28 03:06:27,625 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:06:27,625 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:06:27,625 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 03:06:27,625 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 03:06:27,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 03:06:27,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:06:27,626 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:27,626 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:27,626 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:27,626 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-28 03:06:27,627 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:06:27,627 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:06:27,627 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-28 03:06:27,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:06:27 BoogieIcfgContainer [2020-11-28 03:06:27,634 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:06:27,634 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:06:27,634 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:06:27,635 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:06:27,635 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:06:01" (3/4) ... [2020-11-28 03:06:27,639 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 03:06:27,639 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:06:27,640 INFO L168 Benchmark]: Toolchain (without parser) took 27116.12 ms. Allocated memory was 113.2 MB in the beginning and 285.2 MB in the end (delta: 172.0 MB). Free memory was 85.9 MB in the beginning and 226.8 MB in the end (delta: -141.0 MB). Peak memory consumption was 30.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:27,641 INFO L168 Benchmark]: CDTParser took 0.99 ms. Allocated memory is still 81.8 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:06:27,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.27 ms. Allocated memory is still 113.2 MB. Free memory was 85.9 MB in the beginning and 91.2 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:27,642 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.96 ms. Allocated memory is still 113.2 MB. Free memory was 91.2 MB in the beginning and 90.2 MB in the end (delta: 980.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:06:27,642 INFO L168 Benchmark]: Boogie Preprocessor took 21.85 ms. Allocated memory is still 113.2 MB. Free memory was 90.2 MB in the beginning and 89.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:27,642 INFO L168 Benchmark]: RCFGBuilder took 607.64 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 76.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:27,643 INFO L168 Benchmark]: BuchiAutomizer took 26134.44 ms. Allocated memory was 113.2 MB in the beginning and 285.2 MB in the end (delta: 172.0 MB). Free memory was 76.5 MB in the beginning and 227.9 MB in the end (delta: -151.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:27,643 INFO L168 Benchmark]: Witness Printer took 4.93 ms. Allocated memory is still 285.2 MB. Free memory was 227.9 MB in the beginning and 226.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:06:27,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.99 ms. Allocated memory is still 81.8 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 303.27 ms. Allocated memory is still 113.2 MB. Free memory was 85.9 MB in the beginning and 91.2 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.96 ms. Allocated memory is still 113.2 MB. Free memory was 91.2 MB in the beginning and 90.2 MB in the end (delta: 980.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.85 ms. Allocated memory is still 113.2 MB. Free memory was 90.2 MB in the beginning and 89.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 607.64 ms. Allocated memory is still 113.2 MB. Free memory was 89.1 MB in the beginning and 76.5 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 26134.44 ms. Allocated memory was 113.2 MB in the beginning and 285.2 MB in the end (delta: 172.0 MB). Free memory was 76.5 MB in the beginning and 227.9 MB in the end (delta: -151.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 16.1 GB. * Witness Printer took 4.93 ms. Allocated memory is still 285.2 MB. Free memory was 227.9 MB in the beginning and 226.8 MB in the end (delta: 1.0 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 15 terminating modules (9 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 9 modules have a trivial ranking function, the largest among these consists of 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 26.0s and 11 iterations. TraceHistogramMax:8. Analysis of lassos took 14.4s. Construction of modules took 3.0s. Büchi inclusion checks took 7.8s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 13. Automata minimization 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 191 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 264 states and ocurred in iteration 9. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 437 SDtfs, 1089 SDslu, 1194 SDs, 0 SdLazy, 2786 SolverSat, 572 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI4 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax100 hnf79 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq186 hnf93 smp75 dnf100 smp100 tf110 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 23 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...