./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/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 64bit --witnessprinter.graph.data.programhash 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 23:57:09,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:57:09,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:57:09,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:57:09,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:57:09,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:57:09,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:57:09,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:57:10,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:57:10,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:57:10,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:57:10,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:57:10,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:57:10,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:57:10,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:57:10,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:57:10,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:57:10,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:57:10,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:57:10,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:57:10,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:57:10,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:57:10,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:57:10,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:57:10,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:57:10,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:57:10,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:57:10,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:57:10,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:57:10,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:57:10,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:57:10,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:57:10,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:57:10,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:57:10,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:57:10,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:57:10,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:57:10,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:57:10,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:57:10,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:57:10,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:57:10,047 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 23:57:10,070 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:57:10,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:57:10,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:57:10,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:57:10,073 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:57:10,074 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 23:57:10,074 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 23:57:10,075 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 23:57:10,075 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 23:57:10,075 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 23:57:10,076 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 23:57:10,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:57:10,077 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:57:10,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:57:10,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:57:10,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 23:57:10,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 23:57:10,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 23:57:10,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:57:10,079 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 23:57:10,079 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:57:10,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 23:57:10,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:57:10,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:57:10,080 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 23:57:10,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:57:10,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:57:10,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:57:10,081 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 23:57:10,082 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 23:57:10,083 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_a5b1b087-1698-4ad0-bb13-0208e48645e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 [2020-11-29 23:57:10,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:57:10,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:57:10,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:57:10,433 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:57:10,433 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:57:10,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2020-11-29 23:57:10,533 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/data/33c402b34/b46827ce8c5343f3a901387b8731dc96/FLAGe41c9d28f [2020-11-29 23:57:11,102 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:57:11,103 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2020-11-29 23:57:11,114 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/data/33c402b34/b46827ce8c5343f3a901387b8731dc96/FLAGe41c9d28f [2020-11-29 23:57:11,471 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/data/33c402b34/b46827ce8c5343f3a901387b8731dc96 [2020-11-29 23:57:11,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:57:11,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:57:11,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:57:11,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:57:11,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:57:11,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34aca193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11, skipping insertion in model container [2020-11-29 23:57:11,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:57:11,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:57:11,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:57:11,668 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:57:11,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:57:11,717 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:57:11,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11 WrapperNode [2020-11-29 23:57:11,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:57:11,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:57:11,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:57:11,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:57:11,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:57:11,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:57:11,757 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:57:11,757 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:57:11,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,766 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... [2020-11-29 23:57:11,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:57:11,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:57:11,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:57:11,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:57:11,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:11,868 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-11-29 23:57:11,869 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-11-29 23:57:11,870 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-11-29 23:57:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-11-29 23:57:11,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:57:11,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:57:12,142 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:57:12,157 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-29 23:57:12,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:57:12 BoogieIcfgContainer [2020-11-29 23:57:12,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:57:12,160 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 23:57:12,160 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 23:57:12,164 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 23:57:12,164 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:57:12,165 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 11:57:11" (1/3) ... [2020-11-29 23:57:12,166 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@57f52522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:57:12, skipping insertion in model container [2020-11-29 23:57:12,166 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:57:12,167 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:57:11" (2/3) ... [2020-11-29 23:57:12,167 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@57f52522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 11:57:12, skipping insertion in model container [2020-11-29 23:57:12,167 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 23:57:12,167 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:57:12" (3/3) ... [2020-11-29 23:57:12,169 INFO L373 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c.c [2020-11-29 23:57:12,256 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 23:57:12,256 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 23:57:12,256 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 23:57:12,256 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:57:12,256 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:57:12,257 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 23:57:12,257 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:57:12,257 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 23:57:12,276 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-29 23:57:12,299 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-29 23:57:12,299 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:57:12,299 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:57:12,306 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:57:12,306 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:57:12,306 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 23:57:12,307 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-29 23:57:12,313 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-29 23:57:12,313 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:57:12,313 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:57:12,314 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 23:57:12,314 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:57:12,321 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2020-11-29 23:57:12,322 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec2(~j - 1);< 3#rec2ENTRYtrue [2020-11-29 23:57:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2020-11-29 23:57:12,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:12,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121150674] [2020-11-29 23:57:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:12,424 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:12,438 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:12,458 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:57:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:12,463 INFO L82 PathProgramCache]: Analyzing trace with hash 39867, now seen corresponding path program 1 times [2020-11-29 23:57:12,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:12,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455228536] [2020-11-29 23:57:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:12,488 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:12,497 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:12,501 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:57:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash 48182123, now seen corresponding path program 1 times [2020-11-29 23:57:12,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:12,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795011037] [2020-11-29 23:57:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:12,522 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:12,529 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:12,535 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:57:12,702 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:57:12,703 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:57:12,703 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:57:12,703 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:57:12,704 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:57:12,704 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:12,704 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:57:12,704 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:57:12,704 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2020-11-29 23:57:12,705 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:57:12,705 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:57:12,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:12,733 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:12,741 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:12,746 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:12,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:12,853 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:57:12,854 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:12,862 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:12,862 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:57:12,868 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:57:12,868 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:12,913 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:12,914 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:12,918 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:57:12,918 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:12,960 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:12,960 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:12,966 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:57:12,966 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:13,007 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:13,007 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:13,054 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:57:13,054 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:13,128 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:57:13,131 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:57:13,131 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:57:13,131 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:57:13,131 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:57:13,132 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:57:13,132 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:13,132 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:57:13,132 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:57:13,132 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2020-11-29 23:57:13,132 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:57:13,132 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:57:13,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:13,139 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:13,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:13,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:13,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:13,265 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:57:13,270 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:13,280 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:57:13,282 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:57:13,282 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:57:13,283 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:57:13,283 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:57:13,283 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:57:13,286 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:57:13,286 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:13,290 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:13,335 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:57:13,337 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:57:13,337 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:57:13,337 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:57:13,337 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:57:13,338 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:57:13,342 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:57:13,342 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:13,345 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:57:13,349 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 23:57:13,349 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_a5b1b087-1698-4ad0-bb13-0208e48645e1/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) [2020-11-29 23:57:13,354 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:57:13,354 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:57:13,354 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:57:13,355 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:13,390 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:57:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:13,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 23:57:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:57:13,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:57:13,544 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 23:57:13,545 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 4 states. [2020-11-29 23:57:13,749 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 4 states. Result 36 states and 44 transitions. Complement of second has 12 states. [2020-11-29 23:57:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 23:57:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 23:57:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2020-11-29 23:57:13,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2020-11-29 23:57:13,754 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:13,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2020-11-29 23:57:13,754 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:13,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2020-11-29 23:57:13,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:13,755 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 44 transitions. [2020-11-29 23:57:13,760 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:57:13,766 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 23 states and 30 transitions. [2020-11-29 23:57:13,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-29 23:57:13,768 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-11-29 23:57:13,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2020-11-29 23:57:13,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:57:13,770 INFO L691 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-11-29 23:57:13,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2020-11-29 23:57:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2020-11-29 23:57:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-29 23:57:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-11-29 23:57:13,798 INFO L714 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-11-29 23:57:13,798 INFO L594 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-11-29 23:57:13,798 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 23:57:13,798 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 24 transitions. [2020-11-29 23:57:13,800 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:57:13,800 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:57:13,800 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:57:13,801 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:57:13,801 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:57:13,801 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 108#L25 call main_#t~ret6 := rec2(main_~x~0);< 107#rec2ENTRY ~j := #in~j; 109#L18 assume !(~j <= 0); 111#L20 call #t~ret3 := rec2(~j - 1);< 110#rec2ENTRY ~j := #in~j; 112#L18 assume ~j <= 0;#res := 0; 121#rec2FINAL assume true; 122#rec2EXIT >#33#return; 117#L20-1 call #t~ret4 := rec1(#t~ret3);< 113#rec1ENTRY [2020-11-29 23:57:13,801 INFO L796 eck$LassoCheckResult]: Loop: 113#rec1ENTRY ~i := #in~i; 118#L12 assume !(~i <= 0); 114#L14 call #t~ret0 := rec1(~i - 2);< 113#rec1ENTRY [2020-11-29 23:57:13,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:13,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1361947899, now seen corresponding path program 1 times [2020-11-29 23:57:13,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:13,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367472845] [2020-11-29 23:57:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:13,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:13,810 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:13,815 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:13,817 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:57:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:13,818 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2020-11-29 23:57:13,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:13,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114081453] [2020-11-29 23:57:13,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:13,824 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:13,827 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:13,828 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:57:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash 766186353, now seen corresponding path program 1 times [2020-11-29 23:57:13,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:13,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797713776] [2020-11-29 23:57:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:13,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 23:57:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 23:57:13,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797713776] [2020-11-29 23:57:13,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:57:13,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 23:57:13,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263434202] [2020-11-29 23:57:14,029 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:57:14,029 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:57:14,030 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:57:14,030 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:57:14,030 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:57:14,030 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:14,030 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:57:14,030 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:57:14,030 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2020-11-29 23:57:14,030 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:57:14,030 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:57:14,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,042 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,112 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:57:14,112 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:14,118 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:14,119 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:14,175 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:57:14,176 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 [2020-11-29 23:57:14,241 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:57:14,243 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:57:14,243 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:57:14,243 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:57:14,243 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:57:14,243 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:57:14,244 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:14,244 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:57:14,244 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:57:14,244 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2020-11-29 23:57:14,244 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:57:14,244 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:57:14,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:14,378 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:57:14,378 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:14,386 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:57:14,387 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:57:14,387 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:57:14,388 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:57:14,388 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:57:14,388 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:57:14,389 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:57:14,390 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:14,398 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:57:14,402 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 23:57:14,402 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_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:14,449 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:57:14,449 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:57:14,450 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:57:14,450 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:14,471 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:57:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:14,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 23:57:14,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:57:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:57:14,689 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 23:57:14,689 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7 Second operand 5 states. [2020-11-29 23:57:14,827 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7. Second operand 5 states. Result 43 states and 58 transitions. Complement of second has 14 states. [2020-11-29 23:57:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 23:57:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 23:57:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2020-11-29 23:57:14,830 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 3 letters. [2020-11-29 23:57:14,831 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:14,831 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 13 letters. Loop has 3 letters. [2020-11-29 23:57:14,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:14,832 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 6 letters. [2020-11-29 23:57:14,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:14,832 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 58 transitions. [2020-11-29 23:57:14,837 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:57:14,842 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 37 states and 50 transitions. [2020-11-29 23:57:14,844 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-11-29 23:57:14,844 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2020-11-29 23:57:14,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 50 transitions. [2020-11-29 23:57:14,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:57:14,845 INFO L691 BuchiCegarLoop]: Abstraction has 37 states and 50 transitions. [2020-11-29 23:57:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 50 transitions. [2020-11-29 23:57:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-11-29 23:57:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-29 23:57:14,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2020-11-29 23:57:14,859 INFO L714 BuchiCegarLoop]: Abstraction has 35 states and 46 transitions. [2020-11-29 23:57:14,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:57:14,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 23:57:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 23:57:14,864 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2020-11-29 23:57:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:57:14,937 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-11-29 23:57:14,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 23:57:14,940 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 43 transitions. [2020-11-29 23:57:14,942 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:57:14,944 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 31 states and 40 transitions. [2020-11-29 23:57:14,944 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-11-29 23:57:14,945 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2020-11-29 23:57:14,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 40 transitions. [2020-11-29 23:57:14,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:57:14,946 INFO L691 BuchiCegarLoop]: Abstraction has 31 states and 40 transitions. [2020-11-29 23:57:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 40 transitions. [2020-11-29 23:57:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-11-29 23:57:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 23:57:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-29 23:57:14,951 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-29 23:57:14,952 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-29 23:57:14,952 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 23:57:14,952 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2020-11-29 23:57:14,953 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:57:14,953 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 23:57:14,954 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 23:57:14,955 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:57:14,955 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 23:57:14,955 INFO L794 eck$LassoCheckResult]: Stem: 347#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 324#L25 call main_#t~ret6 := rec2(main_~x~0);< 323#rec2ENTRY ~j := #in~j; 325#L18 assume !(~j <= 0); 327#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 330#L18 assume !(~j <= 0); 328#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 329#L18 assume ~j <= 0;#res := 0; 340#rec2FINAL assume true; 341#rec2EXIT >#33#return; 332#L20-1 call #t~ret4 := rec1(#t~ret3);< 331#rec1ENTRY ~i := #in~i; 333#L12 assume ~i <= 0;#res := 0; 344#rec1FINAL assume true; 345#rec1EXIT >#35#return; 346#L20-2 #res := #t~ret4 - 1;havoc #t~ret4;havoc #t~ret3; 348#rec2FINAL assume true; 350#rec2EXIT >#33#return; 337#L20-1 call #t~ret4 := rec1(#t~ret3);< 342#rec1ENTRY [2020-11-29 23:57:14,955 INFO L796 eck$LassoCheckResult]: Loop: 342#rec1ENTRY ~i := #in~i; 349#L12 assume !(~i <= 0); 335#L14 call #t~ret0 := rec1(~i - 2);< 342#rec1ENTRY [2020-11-29 23:57:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:14,956 INFO L82 PathProgramCache]: Analyzing trace with hash -196165858, now seen corresponding path program 1 times [2020-11-29 23:57:14,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:14,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320799081] [2020-11-29 23:57:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:14,969 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:14,989 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:14,992 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:57:14,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:14,993 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2020-11-29 23:57:14,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:14,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740825876] [2020-11-29 23:57:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:14,997 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:57:14,999 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:57:15,000 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:57:15,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:15,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1473414328, now seen corresponding path program 1 times [2020-11-29 23:57:15,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:57:15,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39552323] [2020-11-29 23:57:15,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:57:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:15,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 23:57:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:15,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 23:57:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:15,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 23:57:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-29 23:57:15,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39552323] [2020-11-29 23:57:15,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:57:15,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 23:57:15,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234172641] [2020-11-29 23:57:15,217 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:57:15,217 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:57:15,218 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:57:15,218 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:57:15,218 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 23:57:15,218 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,218 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:57:15,218 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:57:15,218 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2020-11-29 23:57:15,218 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:57:15,218 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:57:15,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,303 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:57:15,304 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/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) [2020-11-29 23:57:15,310 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:15,311 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,314 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:57:15,314 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:15,354 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:15,355 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,358 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:57:15,358 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,399 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:15,399 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:57:15,406 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:57:15,406 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:15,482 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:15,482 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,486 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:57:15,486 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,537 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:15,537 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:57:15,549 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 23:57:15,549 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,603 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 23:57:15,604 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,645 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 23:57:15,646 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 23:57:15,714 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 23:57:15,716 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 23:57:15,716 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 23:57:15,716 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 23:57:15,716 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 23:57:15,716 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 23:57:15,716 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,716 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 23:57:15,716 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 23:57:15,717 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2020-11-29 23:57:15,717 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 23:57:15,717 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 23:57:15,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,735 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,738 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,741 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 23:57:15,804 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 23:57:15,804 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:15,812 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:57:15,814 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:57:15,814 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:57:15,814 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:57:15,814 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:57:15,815 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:57:15,816 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:57:15,816 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,819 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:15,866 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:57:15,868 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:57:15,868 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:57:15,868 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:57:15,868 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:57:15,868 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:57:15,869 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:57:15,869 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,871 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:15,911 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:57:15,913 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:57:15,914 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:57:15,914 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:57:15,914 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:57:15,914 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:57:15,915 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:57:15,915 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,917 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/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) [2020-11-29 23:57:15,958 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:57:15,960 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:57:15,960 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:57:15,960 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:57:15,960 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:57:15,960 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:57:15,963 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:57:15,963 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:15,969 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:16,009 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 23:57:16,011 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 23:57:16,011 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 23:57:16,012 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 23:57:16,012 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 23:57:16,012 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 23:57:16,014 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 23:57:16,014 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:16,019 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 23:57:16,023 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 23:57:16,023 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_a5b1b087-1698-4ad0-bb13-0208e48645e1/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 23:57:16,027 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 23:57:16,027 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 23:57:16,028 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 23:57:16,028 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 23:57:16,066 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 23:57:16,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:16,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 23:57:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:16,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:57:16,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:57:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:57:16,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:16,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:57:16,248 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 23:57:16,248 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2020-11-29 23:57:16,393 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2020-11-29 23:57:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 23:57:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 23:57:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-29 23:57:16,397 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2020-11-29 23:57:16,397 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:16,397 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 23:57:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 23:57:16,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:16,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:57:16,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:57:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:57:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:57:16,560 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 23:57:16,560 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2020-11-29 23:57:16,628 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2020-11-29 23:57:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 23:57:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 23:57:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-29 23:57:16,629 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2020-11-29 23:57:16,630 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:16,630 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 23:57:16,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:57:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:16,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 23:57:16,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:16,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:57:16,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 23:57:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:57:16,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 23:57:16,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 23:57:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:57:16,778 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-11-29 23:57:16,778 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2020-11-29 23:57:16,924 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 53 states and 65 transitions. Complement of second has 13 states. [2020-11-29 23:57:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 23:57:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 23:57:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 28 transitions. [2020-11-29 23:57:16,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 3 letters. [2020-11-29 23:57:16,926 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:16,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 24 letters. Loop has 3 letters. [2020-11-29 23:57:16,926 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:16,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 6 letters. [2020-11-29 23:57:16,927 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 23:57:16,927 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 65 transitions. [2020-11-29 23:57:16,930 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-29 23:57:16,931 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 41 states and 52 transitions. [2020-11-29 23:57:16,932 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2020-11-29 23:57:16,932 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2020-11-29 23:57:16,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 52 transitions. [2020-11-29 23:57:16,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 23:57:16,933 INFO L691 BuchiCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-11-29 23:57:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 52 transitions. [2020-11-29 23:57:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-29 23:57:16,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 23:57:16,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-11-29 23:57:16,941 INFO L714 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-11-29 23:57:16,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:57:16,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 23:57:16,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-29 23:57:16,942 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2020-11-29 23:57:17,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:57:17,015 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-11-29 23:57:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 23:57:17,016 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 29 transitions. [2020-11-29 23:57:17,017 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:57:17,017 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 0 states and 0 transitions. [2020-11-29 23:57:17,017 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 23:57:17,017 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 23:57:17,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 23:57:17,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 23:57:17,018 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:57:17,018 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:57:17,018 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 23:57:17,018 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 23:57:17,018 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 23:57:17,018 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 23:57:17,018 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 23:57:17,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 11:57:17 BoogieIcfgContainer [2020-11-29 23:57:17,023 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 23:57:17,024 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:57:17,024 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:57:17,024 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:57:17,024 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:57:12" (3/4) ... [2020-11-29 23:57:17,030 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 23:57:17,030 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:57:17,033 INFO L168 Benchmark]: Toolchain (without parser) took 5555.31 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 55.5 MB in the beginning and 96.4 MB in the end (delta: -41.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:17,034 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 86.0 MB. Free memory was 43.8 MB in the beginning and 43.8 MB in the end (delta: 35.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:57:17,035 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.28 ms. Allocated memory is still 86.0 MB. Free memory was 55.3 MB in the beginning and 66.0 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:17,037 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.19 ms. Allocated memory is still 86.0 MB. Free memory was 66.0 MB in the beginning and 64.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:57:17,037 INFO L168 Benchmark]: Boogie Preprocessor took 18.36 ms. Allocated memory is still 86.0 MB. Free memory was 64.7 MB in the beginning and 64.0 MB in the end (delta: 759.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:57:17,042 INFO L168 Benchmark]: RCFGBuilder took 383.07 ms. Allocated memory is still 86.0 MB. Free memory was 64.0 MB in the beginning and 54.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:17,043 INFO L168 Benchmark]: BuchiAutomizer took 4863.51 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 54.6 MB in the beginning and 96.4 MB in the end (delta: -41.8 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2020-11-29 23:57:17,043 INFO L168 Benchmark]: Witness Printer took 6.51 ms. Allocated memory is still 130.0 MB. Free memory is still 96.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:57:17,050 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 86.0 MB. Free memory was 43.8 MB in the beginning and 43.8 MB in the end (delta: 35.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 242.28 ms. Allocated memory is still 86.0 MB. Free memory was 55.3 MB in the beginning and 66.0 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.19 ms. Allocated memory is still 86.0 MB. Free memory was 66.0 MB in the beginning and 64.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.36 ms. Allocated memory is still 86.0 MB. Free memory was 64.7 MB in the beginning and 64.0 MB in the end (delta: 759.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 383.07 ms. Allocated memory is still 86.0 MB. Free memory was 64.0 MB in the beginning and 54.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4863.51 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 54.6 MB in the beginning and 96.4 MB in the end (delta: -41.8 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. * Witness Printer took 6.51 ms. Allocated memory is still 130.0 MB. Free memory is still 96.4 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 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 2 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.7s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 2.8s. Construction of modules took 0.2s. Büchi inclusion checks took 1.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 88 SDtfs, 94 SDslu, 174 SDs, 0 SdLazy, 126 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf92 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf94 smp100 dnf100 smp100 tf111 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 19ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...