./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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 1b7166d94206693c3f254a3c1de8d5825f8510fb .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:01:07,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:01:07,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:01:07,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:01:07,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:01:07,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:01:07,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:01:07,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:01:07,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:01:07,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:01:07,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:01:07,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:01:07,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:01:07,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:01:07,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:01:07,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:01:07,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:01:07,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:01:07,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:01:07,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:01:07,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:01:07,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:01:07,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:01:07,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:01:07,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:01:07,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:01:07,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:01:07,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:01:07,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:01:07,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:01:07,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:01:07,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:01:07,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:01:07,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:01:07,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:01:07,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:01:07,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:01:07,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:01:07,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:01:07,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:01:07,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:01:07,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-10-22 09:01:07,119 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:01:07,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:01:07,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:01:07,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:01:07,121 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:01:07,121 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-10-22 09:01:07,121 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-10-22 09:01:07,121 INFO L138 SettingsManager]: * Use old map elimination=false [2019-10-22 09:01:07,121 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-10-22 09:01:07,121 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-10-22 09:01:07,121 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-10-22 09:01:07,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:01:07,122 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 09:01:07,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:01:07,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:01:07,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-10-22 09:01:07,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-10-22 09:01:07,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-10-22 09:01:07,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:01:07,133 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-10-22 09:01:07,133 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:01:07,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-10-22 09:01:07,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:01:07,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:01:07,133 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-10-22 09:01:07,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:01:07,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:01:07,134 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-10-22 09:01:07,135 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-10-22 09:01:07,135 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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 -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2019-10-22 09:01:07,164 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:01:07,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:01:07,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:01:07,180 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:01:07,181 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:01:07,181 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-10-22 09:01:07,231 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/data/6d50f96cb/e976fcfc5bd14474936660f9f70193c2/FLAGf9f56c2df [2019-10-22 09:01:07,627 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:01:07,628 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-10-22 09:01:07,633 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/data/6d50f96cb/e976fcfc5bd14474936660f9f70193c2/FLAGf9f56c2df [2019-10-22 09:01:07,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/data/6d50f96cb/e976fcfc5bd14474936660f9f70193c2 [2019-10-22 09:01:07,649 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:01:07,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:01:07,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:07,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:01:07,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:01:07,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c2a5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07, skipping insertion in model container [2019-10-22 09:01:07,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,669 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:01:07,683 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:01:07,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:07,841 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:01:07,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:01:07,923 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:01:07,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07 WrapperNode [2019-10-22 09:01:07,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:01:07,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:07,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:01:07,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:01:07,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:01:07,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:01:07,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:01:07,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:01:07,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... [2019-10-22 09:01:07,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:01:07,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:01:07,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:01:07,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:01:07,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,024 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-10-22 09:01:08,024 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-10-22 09:01:08,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:01:08,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:01:08,131 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:01:08,131 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 09:01:08,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:08 BoogieIcfgContainer [2019-10-22 09:01:08,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:01:08,133 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-10-22 09:01:08,133 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-10-22 09:01:08,136 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-10-22 09:01:08,137 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:01:08,137 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.10 09:01:07" (1/3) ... [2019-10-22 09:01:08,138 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7346037e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 09:01:08, skipping insertion in model container [2019-10-22 09:01:08,138 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:01:08,138 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:01:07" (2/3) ... [2019-10-22 09:01:08,138 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7346037e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 09:01:08, skipping insertion in model container [2019-10-22 09:01:08,139 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:01:08,139 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:08" (3/3) ... [2019-10-22 09:01:08,140 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2019-10-22 09:01:08,183 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-10-22 09:01:08,183 INFO L357 BuchiCegarLoop]: Hoare is false [2019-10-22 09:01:08,183 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-10-22 09:01:08,183 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:01:08,183 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:01:08,183 INFO L361 BuchiCegarLoop]: Difference is false [2019-10-22 09:01:08,184 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:01:08,184 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-10-22 09:01:08,196 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-10-22 09:01:08,219 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-10-22 09:01:08,219 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:01:08,219 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:01:08,226 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-10-22 09:01:08,226 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 09:01:08,227 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-10-22 09:01:08,227 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-10-22 09:01:08,228 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-10-22 09:01:08,228 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:01:08,228 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:01:08,229 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-10-22 09:01:08,229 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 09:01:08,236 INFO L791 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 9#L21true call main_#t~ret3 := g(main_~x~0);< 11#gENTRYtrue [2019-10-22 09:01:08,236 INFO L793 eck$LassoCheckResult]: Loop: 11#gENTRYtrue ~x := #in~x; 3#L12true assume !(0 == ~x); 13#L15true call #t~ret0 := g(~x - 1);< 11#gENTRYtrue [2019-10-22 09:01:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash 39891, now seen corresponding path program 1 times [2019-10-22 09:01:08,249 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:08,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326728142] [2019-10-22 09:01:08,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:08,337 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:08,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:08,338 INFO L82 PathProgramCache]: Analyzing trace with hash 29936, now seen corresponding path program 1 times [2019-10-22 09:01:08,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:08,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269807638] [2019-10-22 09:01:08,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:08,355 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1188392926, now seen corresponding path program 1 times [2019-10-22 09:01:08,357 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:08,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642678031] [2019-10-22 09:01:08,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:08,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:08,377 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:08,569 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:01:08,570 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:01:08,570 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:01:08,570 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:01:08,570 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:01:08,571 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,571 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:01:08,571 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:01:08,571 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2019-10-22 09:01:08,571 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:01:08,571 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:01:08,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,605 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,607 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,696 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:01:08,697 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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) [2019-10-22 09:01:08,705 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,705 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,714 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,715 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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) [2019-10-22 09:01:08,724 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,724 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 [2019-10-22 09:01:08,728 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,728 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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) [2019-10-22 09:01:08,736 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,736 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 [2019-10-22 09:01:08,741 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,741 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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) [2019-10-22 09:01:08,752 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,752 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 [2019-10-22 09:01:08,758 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,758 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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) [2019-10-22 09:01:08,767 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,767 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,780 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:01:08,780 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:08,801 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,801 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-1} Honda state: {g_#in~x=-1} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=0}, {g_#in~x=-1}] Lambdas: [9, 10, 1] Nus: [1, 0] [2019-10-22 09:01:08,835 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:01:08,835 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:01:08,836 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:01:08,836 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:01:08,836 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:01:08,836 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,836 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:01:08,836 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:01:08,836 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2019-10-22 09:01:08,837 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:01:08,837 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:01:08,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,859 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,862 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:08,950 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:01:08,950 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:01:08,955 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,955 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,958 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,958 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,963 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,963 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:08,965 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,966 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,971 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,971 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:08,974 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,974 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,979 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,979 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:08,982 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,982 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,987 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,987 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:08,989 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:08,990 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret4=0} Honda state: {ULTIMATE.start_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:08,999 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:08,999 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:09,002 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:09,002 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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) [2019-10-22 09:01:09,023 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:09,024 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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) [2019-10-22 09:01:09,052 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:01:09,052 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 [2019-10-22 09:01:09,068 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:01:09,070 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:01:09,070 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:01:09,070 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:01:09,070 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:01:09,071 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:01:09,071 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:09,071 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:01:09,071 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:01:09,071 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2019-10-22 09:01:09,071 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:01:09,071 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:01:09,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,126 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:09,218 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:01:09,222 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:01:09,225 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,226 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,226 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:09,226 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,227 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:09,227 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,228 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:09,228 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:09,231 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:09,231 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,232 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,232 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:09,232 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,233 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:09,233 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,233 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:09,233 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:09,235 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:09,235 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,236 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,236 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:09,236 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,236 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:09,236 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,237 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:09,237 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:09,238 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:09,239 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,239 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,239 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:09,239 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,239 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:09,240 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,240 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:09,240 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:09,241 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:09,242 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,242 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,243 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:09,243 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,243 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:09,243 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,244 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:09,244 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:09,244 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:09,245 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,245 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,246 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:09,246 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,246 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:09,246 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,246 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:09,247 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:09,247 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:09,248 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,249 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,249 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:09,249 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,249 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:09,249 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,250 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:09,250 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:09,251 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:09,251 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,252 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,252 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:09,252 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,252 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:09,252 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,253 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:09,253 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:09,254 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:09,255 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,255 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,255 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:09,256 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,256 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:09,256 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,256 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:09,256 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:09,257 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:09,258 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:09,258 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:09,259 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:09,259 INFO L203 nArgumentSynthesizer]: 2 loop disjuncts [2019-10-22 09:01:09,259 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:09,266 INFO L400 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-10-22 09:01:09,267 INFO L401 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-10-22 09:01:09,380 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:01:09,438 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2019-10-22 09:01:09,438 INFO L444 ModelExtractionUtils]: 5 out of 11 variables were initially zero. Simplification set additionally 3 variables to zero. [2019-10-22 09:01:09,441 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:01:09,446 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-10-22 09:01:09,446 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:01:09,447 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2019-10-22 09:01:09,451 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-10-22 09:01:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:09,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:09,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:01:09,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:09,609 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-10-22 09:01:09,610 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 5 states. [2019-10-22 09:01:09,757 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 5 states. Result 35 states and 42 transitions. Complement of second has 13 states. [2019-10-22 09:01:09,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-10-22 09:01:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 09:01:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2019-10-22 09:01:09,760 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-10-22 09:01:09,761 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:09,761 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-10-22 09:01:09,761 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:09,761 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-10-22 09:01:09,761 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:09,762 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 42 transitions. [2019-10-22 09:01:09,765 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-10-22 09:01:09,770 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2019-10-22 09:01:09,771 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-10-22 09:01:09,771 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2019-10-22 09:01:09,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2019-10-22 09:01:09,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:01:09,774 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-10-22 09:01:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2019-10-22 09:01:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-10-22 09:01:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 09:01:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 09:01:09,800 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 09:01:09,800 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 09:01:09,800 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-10-22 09:01:09,801 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2019-10-22 09:01:09,801 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-10-22 09:01:09,801 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:01:09,802 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:01:09,802 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:09,803 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:09,803 INFO L791 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 121#L20 assume !(main_~x~0 < 0); 118#L21 call main_#t~ret3 := g(main_~x~0);< 119#gENTRY ~x := #in~x; 117#L12 assume !(0 == ~x); 115#L15 call #t~ret0 := g(~x - 1);< 122#gENTRY ~x := #in~x; 114#L12 assume 0 == ~x;#res := 1; 116#gFINAL assume true; 123#gEXIT >#22#return; 125#L15-1 [2019-10-22 09:01:09,803 INFO L793 eck$LassoCheckResult]: Loop: 125#L15-1 call #t~ret1 := g(1 + #t~ret0);< 126#gENTRY ~x := #in~x; 129#L12 assume !(0 == ~x); 124#L15 call #t~ret0 := g(~x - 1);< 126#gENTRY ~x := #in~x; 129#L12 assume 0 == ~x;#res := 1; 128#gFINAL assume true; 130#gEXIT >#22#return; 125#L15-1 [2019-10-22 09:01:09,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,803 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 1 times [2019-10-22 09:01:09,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146191996] [2019-10-22 09:01:09,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:09,814 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,815 INFO L82 PathProgramCache]: Analyzing trace with hash -243608724, now seen corresponding path program 1 times [2019-10-22 09:01:09,815 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247267599] [2019-10-22 09:01:09,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,816 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:09,824 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:09,824 INFO L82 PathProgramCache]: Analyzing trace with hash -791141734, now seen corresponding path program 1 times [2019-10-22 09:01:09,824 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:09,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720836773] [2019-10-22 09:01:09,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:09,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 09:01:09,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720836773] [2019-10-22 09:01:09,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023281804] [2019-10-22 09:01:09,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:09,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:01:09,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 09:01:10,024 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:10,024 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-10-22 09:01:10,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000794418] [2019-10-22 09:01:10,116 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:01:10,117 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:01:10,117 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:01:10,117 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:01:10,117 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:01:10,117 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:10,117 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:01:10,117 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:01:10,118 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2019-10-22 09:01:10,118 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:01:10,118 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:01:10,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:10,128 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:10,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:10,166 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:01:10,167 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:10,172 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:10,173 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:01:10,185 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:01:10,185 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:11,816 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:01:11,818 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:01:11,818 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:01:11,818 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:01:11,818 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:01:11,818 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:01:11,818 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:11,818 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:01:11,819 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:01:11,819 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2019-10-22 09:01:11,819 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:01:11,819 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:01:11,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:11,825 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:11,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:11,871 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:01:11,871 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:01:11,872 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:11,872 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:11,872 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:11,872 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:11,872 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:11,873 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:11,873 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:11,873 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:11,874 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:11,874 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:11,874 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:11,874 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:11,875 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:11,875 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:11,875 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:11,875 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:11,876 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:11,880 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:01:11,882 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:01:11,882 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2019-10-22 09:01:11,883 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:01:11,883 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:01:11,883 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:01:11,884 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2019-10-22 09:01:11,884 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:01:11,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:11,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:01:11,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:11,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 09:01:11,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:12,061 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-10-22 09:01:12,062 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 8 states. [2019-10-22 09:01:24,558 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 8 states. Result 82 states and 120 transitions. Complement of second has 31 states. [2019-10-22 09:01:24,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2019-10-22 09:01:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 09:01:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2019-10-22 09:01:24,560 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 8 letters. [2019-10-22 09:01:24,561 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:24,561 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 18 letters. Loop has 8 letters. [2019-10-22 09:01:24,562 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:24,562 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 16 letters. [2019-10-22 09:01:24,562 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:24,562 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 82 states and 120 transitions. [2019-10-22 09:01:24,573 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-10-22 09:01:24,578 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 82 states to 58 states and 81 transitions. [2019-10-22 09:01:24,579 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2019-10-22 09:01:24,580 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2019-10-22 09:01:24,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 81 transitions. [2019-10-22 09:01:24,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:01:24,581 INFO L688 BuchiCegarLoop]: Abstraction has 58 states and 81 transitions. [2019-10-22 09:01:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 81 transitions. [2019-10-22 09:01:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-10-22 09:01:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 09:01:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2019-10-22 09:01:24,592 INFO L711 BuchiCegarLoop]: Abstraction has 52 states and 71 transitions. [2019-10-22 09:01:24,592 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:01:24,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:24,596 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 10 states. [2019-10-22 09:01:24,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:24,679 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-10-22 09:01:24,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:01:24,680 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 44 transitions. [2019-10-22 09:01:24,681 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-10-22 09:01:24,682 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 30 states and 34 transitions. [2019-10-22 09:01:24,682 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-10-22 09:01:24,683 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2019-10-22 09:01:24,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 34 transitions. [2019-10-22 09:01:24,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:01:24,683 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-22 09:01:24,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 34 transitions. [2019-10-22 09:01:24,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-10-22 09:01:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-22 09:01:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-22 09:01:24,686 INFO L711 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-22 09:01:24,686 INFO L591 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-22 09:01:24,687 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-10-22 09:01:24,687 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 27 transitions. [2019-10-22 09:01:24,687 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-10-22 09:01:24,687 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:01:24,688 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:01:24,688 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:24,688 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 09:01:24,688 INFO L791 eck$LassoCheckResult]: Stem: 502#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 503#L20 assume !(main_~x~0 < 0); 495#L21 call main_#t~ret3 := g(main_~x~0);< 496#gENTRY ~x := #in~x; 500#L12 assume !(0 == ~x); 501#L15 call #t~ret0 := g(~x - 1);< 507#gENTRY ~x := #in~x; 508#L12 assume 0 == ~x;#res := 1; 509#gFINAL assume true; 510#gEXIT >#22#return; 505#L15-1 call #t~ret1 := g(1 + #t~ret0);< 504#gENTRY ~x := #in~x; 506#L12 assume !(0 == ~x); 514#L15 call #t~ret0 := g(~x - 1);< 518#gENTRY ~x := #in~x; 517#L12 assume !(0 == ~x); 513#L15 [2019-10-22 09:01:24,689 INFO L793 eck$LassoCheckResult]: Loop: 513#L15 call #t~ret0 := g(~x - 1);< 511#gENTRY ~x := #in~x; 515#L12 assume !(0 == ~x); 513#L15 [2019-10-22 09:01:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2001409165, now seen corresponding path program 2 times [2019-10-22 09:01:24,689 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:24,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105723846] [2019-10-22 09:01:24,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:24,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:24,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:24,703 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash 49976, now seen corresponding path program 2 times [2019-10-22 09:01:24,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:24,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176732189] [2019-10-22 09:01:24,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:24,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:24,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:24,711 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:24,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:24,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1244451628, now seen corresponding path program 3 times [2019-10-22 09:01:24,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:24,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439714702] [2019-10-22 09:01:24,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:24,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:24,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:01:24,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439714702] [2019-10-22 09:01:24,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135652692] [2019-10-22 09:01:24,871 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:01:24,903 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 09:01:24,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:01:24,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-22 09:01:24,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 09:01:24,943 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:01:24,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-10-22 09:01:24,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330982948] [2019-10-22 09:01:24,992 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:01:24,992 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:01:24,992 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:01:24,992 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:01:24,992 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:01:24,992 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:24,992 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:01:24,992 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:01:24,992 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2019-10-22 09:01:24,992 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:01:24,993 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:01:24,993 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:25,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:25,001 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:25,003 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:25,039 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:01:25,039 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/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 [2019-10-22 09:01:25,048 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:25,048 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:25,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:01:25,060 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:25,574 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:25,574 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-7, g_~x=-6} Honda state: {g_#in~x=-7, g_~x=-6} Generalized eigenvectors: [{g_#in~x=1, g_~x=0}, {g_#in~x=-1, g_~x=-1}, {g_#in~x=0, g_~x=0}] Lambdas: [0, 1, 3] Nus: [0, 1] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:25,579 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:25,580 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:25,582 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:25,583 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:25,588 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:25,588 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:25,590 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:25,590 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:25,595 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:25,595 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:25,597 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:25,598 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2019-10-22 09:01:25,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:01:25,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:01:25,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:01:25,599 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. cyclomatic complexity: 4 Second operand 10 states. [2019-10-22 09:01:25,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:01:25,706 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-10-22 09:01:25,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:01:25,706 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 28 transitions. [2019-10-22 09:01:25,707 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-10-22 09:01:25,707 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 28 transitions. [2019-10-22 09:01:25,707 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2019-10-22 09:01:25,708 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-10-22 09:01:25,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 28 transitions. [2019-10-22 09:01:25,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:01:25,708 INFO L688 BuchiCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-10-22 09:01:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 28 transitions. [2019-10-22 09:01:25,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2019-10-22 09:01:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-22 09:01:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-10-22 09:01:25,710 INFO L711 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-22 09:01:25,710 INFO L591 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-10-22 09:01:25,711 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-10-22 09:01:25,711 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2019-10-22 09:01:25,711 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-10-22 09:01:25,711 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:01:25,711 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:01:25,712 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:01:25,712 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2019-10-22 09:01:25,712 INFO L791 eck$LassoCheckResult]: Stem: 639#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 640#L20 assume !(main_~x~0 < 0); 632#L21 call main_#t~ret3 := g(main_~x~0);< 633#gENTRY ~x := #in~x; 637#L12 assume !(0 == ~x); 638#L15 call #t~ret0 := g(~x - 1);< 642#gENTRY ~x := #in~x; 643#L12 assume 0 == ~x;#res := 1; 650#gFINAL assume true; 648#gEXIT >#22#return; 635#L15-1 [2019-10-22 09:01:25,712 INFO L793 eck$LassoCheckResult]: Loop: 635#L15-1 call #t~ret1 := g(1 + #t~ret0);< 641#gENTRY ~x := #in~x; 634#L12 assume !(0 == ~x); 636#L15 call #t~ret0 := g(~x - 1);< 647#gENTRY ~x := #in~x; 651#L12 assume !(0 == ~x); 645#L15 call #t~ret0 := g(~x - 1);< 649#gENTRY ~x := #in~x; 652#L12 assume 0 == ~x;#res := 1; 644#gFINAL assume true; 646#gEXIT >#22#return; 635#L15-1 [2019-10-22 09:01:25,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 2 times [2019-10-22 09:01:25,713 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:25,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817505547] [2019-10-22 09:01:25,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:25,720 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:25,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1187216231, now seen corresponding path program 2 times [2019-10-22 09:01:25,720 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:25,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879660854] [2019-10-22 09:01:25,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:25,727 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1917105529, now seen corresponding path program 4 times [2019-10-22 09:01:25,728 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:25,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873574139] [2019-10-22 09:01:25,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:25,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:25,738 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:25,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.10 09:01:25 BoogieIcfgContainer [2019-10-22 09:01:25,936 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-10-22 09:01:25,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:25,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:25,937 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:25,937 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:01:08" (3/4) ... [2019-10-22 09:01:25,940 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-10-22 09:01:25,974 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8b031f82-7e8a-43f5-966d-cfa8e2582339/bin/uautomizer/witness.graphml [2019-10-22 09:01:25,975 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:25,977 INFO L168 Benchmark]: Toolchain (without parser) took 18326.28 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 223.3 MB). Free memory was 949.9 MB in the beginning and 1.0 GB in the end (delta: -75.7 MB). Peak memory consumption was 147.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:25,977 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:25,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -199.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:25,978 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:25,978 INFO L168 Benchmark]: Boogie Preprocessor took 16.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:25,978 INFO L168 Benchmark]: RCFGBuilder took 161.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:25,979 INFO L168 Benchmark]: BuchiAutomizer took 17803.69 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 96.5 MB). Peak memory consumption was 164.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:25,979 INFO L168 Benchmark]: Witness Printer took 38.04 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:25,981 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 270.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -199.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.30 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 161.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 17803.69 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 68.2 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 96.5 MB). Peak memory consumption was 164.6 MB. Max. memory is 11.5 GB. * Witness Printer took 38.04 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function -2 * aux-g(x - 1)-aux + 1 and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. The remainder module has 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 17.7s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 4.4s. Construction of modules took 12.3s. Büchi inclusion checks took 0.8s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 46 SDtfs, 70 SDslu, 99 SDs, 0 SdLazy, 234 SolverSat, 48 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 12.3s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq194 hnf92 smp100 dnf139 smp100 tf104 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 188ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.3s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@75150603=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5abdb1f5=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5d4c4f57=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@fae61f2=0, x=0, x=1, NULL=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 15]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) [L21] CALL g(x) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...