./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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 cb528549fa76ae8087cf7043645dfa20323a0116 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 04:37:03,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:37:03,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:37:03,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:37:03,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:37:03,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:37:03,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:37:03,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:37:03,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:37:03,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:37:03,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:37:03,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:37:03,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:37:03,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:37:03,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:37:03,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:37:03,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:37:03,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:37:03,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:37:03,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:37:03,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:37:03,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:37:03,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:37:03,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:37:03,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:37:03,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:37:03,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:37:03,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:37:03,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:37:03,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:37:03,727 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:37:03,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:37:03,729 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:37:03,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:37:03,731 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:37:03,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:37:03,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:37:03,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:37:03,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:37:03,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:37:03,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:37:03,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 04:37:03,768 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:37:03,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:37:03,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:37:03,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:37:03,782 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:37:03,782 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 04:37:03,783 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 04:37:03,783 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 04:37:03,783 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 04:37:03,784 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 04:37:03,784 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 04:37:03,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:37:03,784 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 04:37:03,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:37:03,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:37:03,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 04:37:03,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 04:37:03,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 04:37:03,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 04:37:03,786 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 04:37:03,786 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:37:03,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 04:37:03,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:37:03,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:37:03,787 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 04:37:03,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:37:03,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 04:37:03,788 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 04:37:03,789 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 04:37:03,790 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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 -> cb528549fa76ae8087cf7043645dfa20323a0116 [2019-11-20 04:37:03,958 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:37:03,971 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:37:03,975 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:37:03,976 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:37:03,977 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:37:03,977 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2019-11-20 04:37:04,045 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/data/48eff283b/9783fdc1309d4e69b3920e54a1c1695b/FLAG8fc78b31d [2019-11-20 04:37:04,449 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:37:04,450 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2019-11-20 04:37:04,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/data/48eff283b/9783fdc1309d4e69b3920e54a1c1695b/FLAG8fc78b31d [2019-11-20 04:37:04,824 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/data/48eff283b/9783fdc1309d4e69b3920e54a1c1695b [2019-11-20 04:37:04,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:37:04,832 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 04:37:04,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:37:04,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:37:04,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:37:04,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:37:04" (1/1) ... [2019-11-20 04:37:04,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6faa9972 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:04, skipping insertion in model container [2019-11-20 04:37:04,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:37:04" (1/1) ... [2019-11-20 04:37:04,850 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:37:04,870 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:37:05,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:37:05,090 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:37:05,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:37:05,195 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:37:05,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05 WrapperNode [2019-11-20 04:37:05,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:37:05,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 04:37:05,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 04:37:05,197 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 04:37:05,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... [2019-11-20 04:37:05,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... [2019-11-20 04:37:05,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 04:37:05,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:37:05,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:37:05,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:37:05,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... [2019-11-20 04:37:05,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... [2019-11-20 04:37:05,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... [2019-11-20 04:37:05,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... [2019-11-20 04:37:05,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... [2019-11-20 04:37:05,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... [2019-11-20 04:37:05,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... [2019-11-20 04:37:05,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:37:05,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:37:05,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:37:05,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:37:05,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:05,311 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-11-20 04:37:05,312 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-11-20 04:37:05,312 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-11-20 04:37:05,312 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-11-20 04:37:05,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:37:05,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:37:05,477 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:37:05,485 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 04:37:05,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:37:05 BoogieIcfgContainer [2019-11-20 04:37:05,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:37:05,487 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 04:37:05,487 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 04:37:05,494 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 04:37:05,495 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 04:37:05,495 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 04:37:04" (1/3) ... [2019-11-20 04:37:05,496 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5c2a2ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 04:37:05, skipping insertion in model container [2019-11-20 04:37:05,496 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 04:37:05,497 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:37:05" (2/3) ... [2019-11-20 04:37:05,497 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5c2a2ede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 04:37:05, skipping insertion in model container [2019-11-20 04:37:05,497 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 04:37:05,498 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:37:05" (3/3) ... [2019-11-20 04:37:05,499 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2019-11-20 04:37:05,566 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 04:37:05,566 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 04:37:05,567 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 04:37:05,567 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:37:05,579 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:37:05,579 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 04:37:05,580 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:37:05,580 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 04:37:05,597 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-20 04:37:05,633 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 04:37:05,634 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 04:37:05,634 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 04:37:05,650 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 04:37:05,651 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:05,651 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 04:37:05,651 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-20 04:37:05,658 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 04:37:05,658 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 04:37:05,658 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 04:37:05,659 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 04:37:05,659 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:05,667 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2019-11-20 04:37:05,668 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j - 1);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3);< 3#rec2ENTRYtrue [2019-11-20 04:37:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:05,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2019-11-20 04:37:05,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:05,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482412120] [2019-11-20 04:37:05,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:05,775 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2019-11-20 04:37:05,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:05,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263702964] [2019-11-20 04:37:05,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:05,806 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:05,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2019-11-20 04:37:05,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:05,809 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673804362] [2019-11-20 04:37:05,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:05,828 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:06,046 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:06,047 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:06,047 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:06,047 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:06,048 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 04:37:06,048 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:06,048 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:06,049 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:06,049 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2019-11-20 04:37:06,049 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:06,049 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:06,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,162 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:06,163 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) [2019-11-20 04:37:06,179 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:06,180 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 [2019-11-20 04:37:06,191 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:06,192 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) [2019-11-20 04:37:06,208 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:06,209 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:06,213 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:06,214 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:06,230 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:06,230 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 [2019-11-20 04:37:06,235 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:06,236 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) [2019-11-20 04:37:06,251 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:06,251 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 [2019-11-20 04:37:06,256 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:06,257 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) [2019-11-20 04:37:06,273 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:06,274 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/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:06,289 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 04:37:06,290 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:06,298 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 04:37:06,301 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:06,301 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:06,301 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:06,301 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:06,301 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 04:37:06,302 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:06,302 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:06,302 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:06,302 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2019-11-20 04:37:06,302 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:06,302 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:06,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:06,378 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:06,384 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:06,393 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:06,396 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:06,396 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:06,397 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:06,397 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:06,398 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:06,400 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:06,400 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:06,404 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) [2019-11-20 04:37:06,413 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:06,415 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:06,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:06,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:06,416 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:06,416 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:06,417 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:06,418 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:06,420 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:06,444 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:06,446 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:06,446 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:06,447 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:06,447 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:06,447 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:06,449 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:06,449 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:06,457 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) [2019-11-20 04:37:06,476 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:06,478 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:06,479 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:06,479 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:06,479 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:06,479 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:06,485 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:06,485 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:06,491 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 04:37:06,515 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 04:37:06,515 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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 [2019-11-20 04:37:06,521 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 04:37:06,521 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 04:37:06,522 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 04:37:06,522 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2019-11-20 04:37:06,533 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 04:37:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:06,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:06,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 04:37:06,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:06,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 04:37:06,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:37:06,754 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2019-11-20 04:37:06,756 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 7 states. [2019-11-20 04:37:07,402 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 7 states. Result 194 states and 279 transitions. Complement of second has 61 states. [2019-11-20 04:37:07,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-20 04:37:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2019-11-20 04:37:07,412 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-20 04:37:07,417 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:07,418 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2019-11-20 04:37:07,419 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:07,419 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2019-11-20 04:37:07,420 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:07,421 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2019-11-20 04:37:07,458 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 04:37:07,474 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2019-11-20 04:37:07,475 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2019-11-20 04:37:07,476 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2019-11-20 04:37:07,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2019-11-20 04:37:07,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:07,478 INFO L688 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2019-11-20 04:37:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2019-11-20 04:37:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2019-11-20 04:37:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-20 04:37:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2019-11-20 04:37:07,543 INFO L711 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2019-11-20 04:37:07,545 INFO L591 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2019-11-20 04:37:07,545 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 04:37:07,546 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2019-11-20 04:37:07,550 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 04:37:07,550 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 04:37:07,550 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 04:37:07,551 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:07,551 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 04:37:07,552 INFO L794 eck$LassoCheckResult]: Stem: 378#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 345#L25 call main_#t~ret6 := rec2(main_~x~0);< 344#rec2ENTRY ~j := #in~j; 347#L18 assume !(~j <= 0); 363#L20 call #t~ret3 := rec1(~j - 1);< 379#rec1ENTRY ~i := #in~i; 397#L12 assume !(~i <= 0); 351#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2019-11-20 04:37:07,552 INFO L796 eck$LassoCheckResult]: Loop: 350#rec1ENTRY ~i := #in~i; 358#L12 assume !(~i <= 0); 354#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2019-11-20 04:37:07,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:07,553 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2019-11-20 04:37:07,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:07,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246364463] [2019-11-20 04:37:07,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:07,594 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:07,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:07,595 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2019-11-20 04:37:07,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:07,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910784857] [2019-11-20 04:37:07,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:07,613 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2019-11-20 04:37:07,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:07,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517058823] [2019-11-20 04:37:07,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:07,649 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:07,698 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:07,698 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:07,698 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:07,698 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:07,698 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 04:37:07,699 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:07,699 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:07,699 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:07,699 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2019-11-20 04:37:07,699 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:07,699 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:07,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,714 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,773 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:07,773 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) [2019-11-20 04:37:07,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:07,790 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:07,796 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:07,797 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:07,818 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:07,818 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:07,824 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:07,824 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:07,833 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:07,834 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:07,847 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:07,847 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:07,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:07,858 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:07,863 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:07,863 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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 [2019-11-20 04:37:07,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:07,870 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:07,873 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:07,873 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:07,879 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:07,880 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:07,889 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 04:37:07,889 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:07,898 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 04:37:07,901 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:07,901 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:07,901 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:07,901 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:07,902 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 04:37:07,902 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:07,902 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:07,902 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:07,902 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2019-11-20 04:37:07,902 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:07,902 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:07,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,923 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,932 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:07,981 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:07,981 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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 [2019-11-20 04:37:08,001 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:08,003 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:08,004 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:08,004 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:08,004 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:08,004 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:08,005 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:08,005 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:08,007 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,018 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:08,020 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:08,020 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:08,021 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:08,021 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:08,021 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:08,023 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:08,023 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:08,026 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,046 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:08,048 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:08,048 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:08,048 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:08,048 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:08,048 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:08,049 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:08,049 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:08,051 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) [2019-11-20 04:37:08,062 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:08,064 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:08,064 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:08,064 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:08,064 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:08,065 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:08,066 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:08,066 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,068 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/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) [2019-11-20 04:37:08,075 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:08,076 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:08,077 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:08,077 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:08,077 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:08,077 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,078 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:08,078 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:08,081 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 04:37:08,083 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 04:37:08,083 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,088 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 04:37:08,088 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 04:37:08,089 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 04:37:08,089 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-20 04:37:08,091 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 04:37:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:08,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:37:08,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:08,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:37:08,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:37:08,177 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-20 04:37:08,177 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 Second operand 4 states. [2019-11-20 04:37:08,252 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. Second operand 4 states. Result 105 states and 149 transitions. Complement of second has 13 states. [2019-11-20 04:37:08,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 04:37:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2019-11-20 04:37:08,254 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2019-11-20 04:37:08,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:08,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2019-11-20 04:37:08,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:08,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2019-11-20 04:37:08,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:08,255 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2019-11-20 04:37:08,259 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 04:37:08,263 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2019-11-20 04:37:08,263 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2019-11-20 04:37:08,264 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2019-11-20 04:37:08,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2019-11-20 04:37:08,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:08,265 INFO L688 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2019-11-20 04:37:08,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2019-11-20 04:37:08,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2019-11-20 04:37:08,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 04:37:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2019-11-20 04:37:08,281 INFO L711 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2019-11-20 04:37:08,282 INFO L591 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2019-11-20 04:37:08,282 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 04:37:08,282 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2019-11-20 04:37:08,284 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 04:37:08,284 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 04:37:08,284 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 04:37:08,285 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:08,285 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 04:37:08,286 INFO L794 eck$LassoCheckResult]: Stem: 613#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 614#L25 call main_#t~ret6 := rec2(main_~x~0);< 620#rec2ENTRY ~j := #in~j; 633#L18 assume !(~j <= 0); 615#L20 call #t~ret3 := rec1(~j - 1);< 642#rec1ENTRY ~i := #in~i; 637#L12 assume !(~i <= 0); 577#L14 call #t~ret0 := rec1(~i - 2);< 576#rec1ENTRY ~i := #in~i; 579#L12 assume ~i <= 0;#res := 0; 583#rec1FINAL assume true; 584#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 595#rec1ENTRY [2019-11-20 04:37:08,286 INFO L796 eck$LassoCheckResult]: Loop: 595#rec1ENTRY ~i := #in~i; 632#L12 assume !(~i <= 0); 589#L14 call #t~ret0 := rec1(~i - 2);< 595#rec1ENTRY [2019-11-20 04:37:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:08,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2019-11-20 04:37:08,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:08,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067813388] [2019-11-20 04:37:08,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:08,301 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:08,302 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2019-11-20 04:37:08,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:08,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857237838] [2019-11-20 04:37:08,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:08,308 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:08,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:08,308 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2019-11-20 04:37:08,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:08,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692020418] [2019-11-20 04:37:08,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 04:37:08,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692020418] [2019-11-20 04:37:08,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:37:08,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 04:37:08,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271119946] [2019-11-20 04:37:08,454 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:08,454 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:08,454 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:08,454 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:08,455 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 04:37:08,455 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,455 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:08,455 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:08,455 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2019-11-20 04:37:08,455 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:08,456 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:08,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,525 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:08,525 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,530 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:08,530 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:08,533 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:08,533 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,539 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:08,539 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,547 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 04:37:08,547 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:08,613 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 04:37:08,614 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:08,615 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:08,615 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:08,615 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:08,615 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 04:37:08,615 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,615 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:08,615 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:08,615 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2019-11-20 04:37:08,615 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:08,615 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:08,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,644 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:08,686 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:08,687 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:08,693 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:08,695 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:08,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:08,696 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:08,696 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:08,696 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:08,697 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:08,697 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,699 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,705 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:08,706 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:08,707 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:08,707 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:08,707 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:08,707 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:08,708 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:08,708 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:08,711 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 04:37:08,714 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 04:37:08,714 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:08,721 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 04:37:08,721 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 04:37:08,721 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 04:37:08,721 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-20 04:37:08,723 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 04:37:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:08,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:37:08,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:08,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:37:08,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:37:08,847 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 04:37:08,847 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 Second operand 5 states. [2019-11-20 04:37:08,960 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. Second operand 5 states. Result 134 states and 193 transitions. Complement of second has 14 states. [2019-11-20 04:37:08,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:08,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 04:37:08,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2019-11-20 04:37:08,962 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-20 04:37:08,962 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:08,962 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2019-11-20 04:37:08,963 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:08,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2019-11-20 04:37:08,963 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:08,963 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2019-11-20 04:37:08,967 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 04:37:08,973 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2019-11-20 04:37:08,973 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2019-11-20 04:37:08,974 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2019-11-20 04:37:08,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2019-11-20 04:37:08,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:08,975 INFO L688 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2019-11-20 04:37:08,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2019-11-20 04:37:08,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2019-11-20 04:37:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 04:37:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2019-11-20 04:37:08,989 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2019-11-20 04:37:08,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:37:08,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:37:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:37:08,994 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand 6 states. [2019-11-20 04:37:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:37:09,066 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2019-11-20 04:37:09,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:37:09,067 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2019-11-20 04:37:09,070 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-11-20 04:37:09,075 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2019-11-20 04:37:09,075 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2019-11-20 04:37:09,076 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2019-11-20 04:37:09,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2019-11-20 04:37:09,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:09,076 INFO L688 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2019-11-20 04:37:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2019-11-20 04:37:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2019-11-20 04:37:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-20 04:37:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2019-11-20 04:37:09,095 INFO L711 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2019-11-20 04:37:09,095 INFO L591 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2019-11-20 04:37:09,095 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 04:37:09,096 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2019-11-20 04:37:09,097 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-20 04:37:09,097 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 04:37:09,097 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 04:37:09,098 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:09,098 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:09,099 INFO L794 eck$LassoCheckResult]: Stem: 1167#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1168#L25 call main_#t~ret6 := rec2(main_~x~0);< 1174#rec2ENTRY ~j := #in~j; 1185#L18 assume !(~j <= 0); 1146#L20 call #t~ret3 := rec1(~j - 1);< 1184#rec1ENTRY ~i := #in~i; 1183#L12 assume !(~i <= 0); 1156#L14 call #t~ret0 := rec1(~i - 2);< 1181#rec1ENTRY ~i := #in~i; 1179#L12 assume !(~i <= 0); 1161#L14 call #t~ret0 := rec1(~i - 2);< 1178#rec1ENTRY ~i := #in~i; 1180#L12 assume ~i <= 0;#res := 0; 1222#rec1FINAL assume true; 1166#rec1EXIT >#27#return; 1133#L14-1 [2019-11-20 04:37:09,099 INFO L796 eck$LassoCheckResult]: Loop: 1133#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1132#rec1ENTRY ~i := #in~i; 1135#L12 assume ~i <= 0;#res := 0; 1140#rec1FINAL assume true; 1141#rec1EXIT >#29#return; 1154#L14-2 call #t~ret2 := rec1(#t~ret1);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume !(~i <= 0); 1157#L14 call #t~ret0 := rec1(~i - 2);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume ~i <= 0;#res := 0; 1205#rec1FINAL assume true; 1213#rec1EXIT >#27#return; 1133#L14-1 [2019-11-20 04:37:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:09,099 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2019-11-20 04:37:09,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:09,099 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706395061] [2019-11-20 04:37:09,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:09,130 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:09,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2019-11-20 04:37:09,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:09,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418513591] [2019-11-20 04:37:09,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 04:37:09,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418513591] [2019-11-20 04:37:09,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214004991] [2019-11-20 04:37:09,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:37:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 04:37:09,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:37:09,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 04:37:09,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2019-11-20 04:37:09,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251508426] [2019-11-20 04:37:09,209 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 04:37:09,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:37:09,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:37:09,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:37:09,212 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand 6 states. [2019-11-20 04:37:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:37:09,267 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2019-11-20 04:37:09,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:37:09,268 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2019-11-20 04:37:09,271 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 04:37:09,277 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2019-11-20 04:37:09,278 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2019-11-20 04:37:09,279 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2019-11-20 04:37:09,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2019-11-20 04:37:09,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:09,279 INFO L688 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2019-11-20 04:37:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2019-11-20 04:37:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2019-11-20 04:37:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 04:37:09,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2019-11-20 04:37:09,293 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2019-11-20 04:37:09,293 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2019-11-20 04:37:09,294 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 04:37:09,294 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2019-11-20 04:37:09,295 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-20 04:37:09,295 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 04:37:09,296 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 04:37:09,297 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:09,298 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:09,298 INFO L794 eck$LassoCheckResult]: Stem: 1445#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1446#L25 call main_#t~ret6 := rec2(main_~x~0);< 1458#rec2ENTRY ~j := #in~j; 1471#L18 assume !(~j <= 0); 1422#L20 call #t~ret3 := rec1(~j - 1);< 1470#rec1ENTRY ~i := #in~i; 1469#L12 assume !(~i <= 0); 1418#L14 call #t~ret0 := rec1(~i - 2);< 1467#rec1ENTRY ~i := #in~i; 1440#L12 assume ~i <= 0;#res := 0; 1417#rec1FINAL assume true; 1419#rec1EXIT >#27#return; 1410#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1441#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1434#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1435#rec1FINAL assume true; 1464#rec1EXIT >#33#return; 1404#L20-1 [2019-11-20 04:37:09,298 INFO L796 eck$LassoCheckResult]: Loop: 1404#L20-1 call #t~ret4 := rec2(#t~ret3);< 1403#rec2ENTRY ~j := #in~j; 1405#L18 assume !(~j <= 0); 1452#L20 call #t~ret3 := rec1(~j - 1);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume !(~i <= 0); 1447#L14 call #t~ret0 := rec1(~i - 2);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume ~i <= 0;#res := 0; 1511#rec1FINAL assume true; 1507#rec1EXIT >#27#return; 1411#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1506#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1463#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1475#rec1FINAL assume true; 1461#rec1EXIT >#33#return; 1404#L20-1 [2019-11-20 04:37:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:09,299 INFO L82 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2019-11-20 04:37:09,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:09,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376262389] [2019-11-20 04:37:09,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:09,330 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:09,331 INFO L82 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2019-11-20 04:37:09,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:09,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285021131] [2019-11-20 04:37:09,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:09,362 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:09,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:09,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2019-11-20 04:37:09,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:09,363 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007021406] [2019-11-20 04:37:09,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-20 04:37:09,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007021406] [2019-11-20 04:37:09,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948454319] [2019-11-20 04:37:09,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:37:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:09,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 04:37:09,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-20 04:37:09,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:37:09,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-20 04:37:09,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507632263] [2019-11-20 04:37:09,983 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:09,984 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:09,984 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:09,984 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:09,984 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 04:37:09,984 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:09,984 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:09,984 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:09,984 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2019-11-20 04:37:09,985 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:09,985 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:09,986 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:10,006 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:10,013 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:10,074 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:10,074 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:10,102 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:10,103 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:10,116 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 04:37:10,116 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:14,113 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 04:37:14,115 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:14,115 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:14,115 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:14,115 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:14,115 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 04:37:14,115 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:14,115 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:14,115 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:14,115 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2019-11-20 04:37:14,116 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:14,116 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:14,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:14,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:14,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:14,192 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:14,192 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:14,197 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:14,199 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:14,200 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:14,200 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:14,200 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:14,200 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:14,201 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:14,201 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:14,204 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:14,213 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:14,219 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:14,219 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:14,219 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:14,219 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:14,219 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:14,221 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:14,221 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:14,223 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:14,233 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:14,235 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:14,235 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:14,236 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:14,236 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:14,236 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:14,239 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:14,239 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:14,243 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 04:37:14,249 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 04:37:14,249 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:14,257 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 04:37:14,258 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 04:37:14,258 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 04:37:14,258 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2019-11-20 04:37:14,260 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:14,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:14,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 04:37:14,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:14,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:14,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:14,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:14,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 04:37:14,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-20 04:37:14,589 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-20 04:37:14,589 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand 11 states. [2019-11-20 04:37:15,124 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand 11 states. Result 584 states and 903 transitions. Complement of second has 45 states. [2019-11-20 04:37:15,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 04:37:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2019-11-20 04:37:15,127 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2019-11-20 04:37:15,128 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:15,128 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2019-11-20 04:37:15,129 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:15,129 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2019-11-20 04:37:15,134 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:15,135 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2019-11-20 04:37:15,158 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-11-20 04:37:15,180 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2019-11-20 04:37:15,180 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2019-11-20 04:37:15,184 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2019-11-20 04:37:15,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2019-11-20 04:37:15,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:15,184 INFO L688 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2019-11-20 04:37:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2019-11-20 04:37:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2019-11-20 04:37:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2019-11-20 04:37:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2019-11-20 04:37:15,248 INFO L711 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2019-11-20 04:37:15,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:37:15,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 04:37:15,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 04:37:15,250 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand 12 states. [2019-11-20 04:37:15,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:37:15,483 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2019-11-20 04:37:15,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 04:37:15,484 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2019-11-20 04:37:15,493 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-11-20 04:37:15,501 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2019-11-20 04:37:15,502 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2019-11-20 04:37:15,502 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2019-11-20 04:37:15,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2019-11-20 04:37:15,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:15,505 INFO L688 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2019-11-20 04:37:15,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2019-11-20 04:37:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2019-11-20 04:37:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2019-11-20 04:37:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2019-11-20 04:37:15,525 INFO L711 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2019-11-20 04:37:15,525 INFO L591 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2019-11-20 04:37:15,526 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-20 04:37:15,526 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2019-11-20 04:37:15,529 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-11-20 04:37:15,529 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 04:37:15,530 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 04:37:15,531 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:15,531 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 04:37:15,531 INFO L794 eck$LassoCheckResult]: Stem: 3437#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3438#L25 call main_#t~ret6 := rec2(main_~x~0);< 3454#rec2ENTRY ~j := #in~j; 3476#L18 assume !(~j <= 0); 3456#L20 call #t~ret3 := rec1(~j - 1);< 3474#rec1ENTRY ~i := #in~i; 3490#L12 assume !(~i <= 0); 3483#L14 call #t~ret0 := rec1(~i - 2);< 3489#rec1ENTRY ~i := #in~i; 3494#L12 assume ~i <= 0;#res := 0; 3548#rec1FINAL assume true; 3545#rec1EXIT >#27#return; 3540#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3541#rec1ENTRY ~i := #in~i; 3544#L12 assume ~i <= 0;#res := 0; 3543#rec1FINAL assume true; 3539#rec1EXIT >#29#return; 3535#L14-2 call #t~ret2 := rec1(#t~ret1);< 3537#rec1ENTRY ~i := #in~i; 3542#L12 assume ~i <= 0;#res := 0; 3538#rec1FINAL assume true; 3536#rec1EXIT >#31#return; 3532#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 3568#rec1FINAL assume true; 3455#rec1EXIT >#33#return; 3386#L20-1 call #t~ret4 := rec2(#t~ret3);< 3385#rec2ENTRY ~j := #in~j; 3387#L18 assume !(~j <= 0); 3521#L20 call #t~ret3 := rec1(~j - 1);< 3461#rec1ENTRY ~i := #in~i; 3567#L12 assume !(~i <= 0); 3423#L14 call #t~ret0 := rec1(~i - 2);< 3440#rec1ENTRY [2019-11-20 04:37:15,532 INFO L796 eck$LassoCheckResult]: Loop: 3440#rec1ENTRY ~i := #in~i; 3553#L12 assume !(~i <= 0); 3420#L14 call #t~ret0 := rec1(~i - 2);< 3440#rec1ENTRY [2019-11-20 04:37:15,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:15,532 INFO L82 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2019-11-20 04:37:15,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:15,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016201050] [2019-11-20 04:37:15,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-20 04:37:15,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016201050] [2019-11-20 04:37:15,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054019903] [2019-11-20 04:37:15,655 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:37:15,701 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:37:15,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:37:15,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 04:37:15,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-20 04:37:15,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:37:15,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-20 04:37:15,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809918907] [2019-11-20 04:37:15,723 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 04:37:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:15,727 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2019-11-20 04:37:15,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:15,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897669176] [2019-11-20 04:37:15,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:15,735 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:15,762 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:15,762 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:15,762 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:15,762 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:15,762 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 04:37:15,763 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:15,763 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:15,763 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:15,763 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2019-11-20 04:37:15,763 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:15,763 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:15,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,769 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,797 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,834 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:15,834 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:15,844 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:15,845 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:15,849 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:15,849 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:15,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:15,857 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:15,869 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 04:37:15,869 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:15,941 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 04:37:15,943 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:15,944 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:15,944 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:15,944 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:15,944 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 04:37:15,944 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:15,944 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:15,944 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:15,945 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2019-11-20 04:37:15,945 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:15,945 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:15,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:15,999 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:15,999 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:16,021 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:16,023 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:16,023 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:16,023 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:16,023 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:16,023 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:16,024 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:16,024 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:16,026 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:16,032 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:16,034 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:16,034 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:16,035 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:16,035 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:16,035 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:16,036 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:16,036 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:16,039 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 04:37:16,041 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 04:37:16,042 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:16,050 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 04:37:16,050 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 04:37:16,050 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 04:37:16,050 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-20 04:37:16,053 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:16,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:16,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:37:16,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:16,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:16,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:16,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:16,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:37:16,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:37:16,222 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 04:37:16,222 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-11-20 04:37:16,310 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2019-11-20 04:37:16,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:16,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 04:37:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-11-20 04:37:16,317 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-20 04:37:16,318 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:16,318 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 04:37:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:16,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:37:16,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:16,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:16,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:16,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:16,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:37:16,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:37:16,469 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 04:37:16,469 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-11-20 04:37:16,593 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2019-11-20 04:37:16,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 04:37:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-11-20 04:37:16,595 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-20 04:37:16,595 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:16,595 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 04:37:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Exception during sending of exit command (exit): Broken pipe [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Exception during sending of exit command (exit): Broken pipe [2019-11-20 04:37:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:16,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:37:16,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:16,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:16,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:16,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:16,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:37:16,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:37:16,774 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 04:37:16,774 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-11-20 04:37:16,881 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 485 states and 616 transitions. Complement of second has 16 states. [2019-11-20 04:37:16,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 04:37:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2019-11-20 04:37:16,888 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-20 04:37:16,888 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:16,889 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2019-11-20 04:37:16,889 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:16,890 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2019-11-20 04:37:16,891 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:16,891 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2019-11-20 04:37:16,899 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2019-11-20 04:37:16,907 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2019-11-20 04:37:16,908 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2019-11-20 04:37:16,908 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2019-11-20 04:37:16,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2019-11-20 04:37:16,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:16,910 INFO L688 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2019-11-20 04:37:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2019-11-20 04:37:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2019-11-20 04:37:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-11-20 04:37:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2019-11-20 04:37:16,927 INFO L711 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2019-11-20 04:37:16,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:37:16,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:37:16,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:37:16,928 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand 10 states. [2019-11-20 04:37:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:37:17,083 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2019-11-20 04:37:17,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 04:37:17,085 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2019-11-20 04:37:17,092 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-20 04:37:17,094 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2019-11-20 04:37:17,094 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2019-11-20 04:37:17,095 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2019-11-20 04:37:17,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2019-11-20 04:37:17,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:17,096 INFO L688 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2019-11-20 04:37:17,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2019-11-20 04:37:17,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2019-11-20 04:37:17,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-20 04:37:17,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2019-11-20 04:37:17,102 INFO L711 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2019-11-20 04:37:17,102 INFO L591 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2019-11-20 04:37:17,102 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-20 04:37:17,102 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2019-11-20 04:37:17,103 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-20 04:37:17,104 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 04:37:17,104 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 04:37:17,105 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:17,105 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 04:37:17,105 INFO L794 eck$LassoCheckResult]: Stem: 6182#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6183#L25 call main_#t~ret6 := rec2(main_~x~0);< 6187#rec2ENTRY ~j := #in~j; 6213#L18 assume !(~j <= 0); 6210#L20 call #t~ret3 := rec1(~j - 1);< 6212#rec1ENTRY ~i := #in~i; 6211#L12 assume !(~i <= 0); 6172#L14 call #t~ret0 := rec1(~i - 2);< 6189#rec1ENTRY ~i := #in~i; 6177#L12 assume !(~i <= 0); 6170#L14 [2019-11-20 04:37:17,105 INFO L796 eck$LassoCheckResult]: Loop: 6170#L14 call #t~ret0 := rec1(~i - 2);< 6219#rec1ENTRY ~i := #in~i; 6177#L12 assume !(~i <= 0); 6170#L14 [2019-11-20 04:37:17,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2019-11-20 04:37:17,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:17,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747886812] [2019-11-20 04:37:17,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:17,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:17,129 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2019-11-20 04:37:17,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:17,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394075826] [2019-11-20 04:37:17,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:17,138 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:17,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2019-11-20 04:37:17,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:17,139 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558663035] [2019-11-20 04:37:17,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:17,163 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:17,212 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:17,212 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:17,212 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:17,212 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:17,212 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 04:37:17,212 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:17,213 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:17,213 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:17,213 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2019-11-20 04:37:17,213 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:17,213 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:17,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:17,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:17,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:17,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:17,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:17,278 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:17,278 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:17,284 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:17,284 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:17,298 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 04:37:17,298 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:24,232 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 04:37:24,234 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:24,234 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:24,234 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:24,234 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:24,234 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 04:37:24,234 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:24,234 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:24,235 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:24,235 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2019-11-20 04:37:24,235 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:24,235 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:24,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:24,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:24,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:24,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:24,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:24,292 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:24,293 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:24,299 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:24,300 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:24,300 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:24,301 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:24,301 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:24,301 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:24,302 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:24,302 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:24,305 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 04:37:24,313 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 04:37:24,313 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:24,319 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 04:37:24,319 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 04:37:24,320 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 04:37:24,320 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2019-11-20 04:37:24,322 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:24,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:37:24,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:37:24,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:37:24,395 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-20 04:37:24,396 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 Second operand 4 states. [2019-11-20 04:37:24,428 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 100 states and 124 transitions. Complement of second has 11 states. [2019-11-20 04:37:24,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 04:37:24,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2019-11-20 04:37:24,434 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2019-11-20 04:37:24,434 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:24,434 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-20 04:37:24,434 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:24,434 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2019-11-20 04:37:24,434 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:24,435 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2019-11-20 04:37:24,437 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-20 04:37:24,438 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2019-11-20 04:37:24,438 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2019-11-20 04:37:24,439 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2019-11-20 04:37:24,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2019-11-20 04:37:24,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:24,439 INFO L688 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2019-11-20 04:37:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2019-11-20 04:37:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-20 04:37:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-20 04:37:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2019-11-20 04:37:24,445 INFO L711 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2019-11-20 04:37:24,446 INFO L591 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2019-11-20 04:37:24,446 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-20 04:37:24,446 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2019-11-20 04:37:24,447 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-20 04:37:24,447 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 04:37:24,447 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 04:37:24,449 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:37:24,450 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-20 04:37:24,450 INFO L794 eck$LassoCheckResult]: Stem: 6436#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6405#L25 call main_#t~ret6 := rec2(main_~x~0);< 6404#rec2ENTRY ~j := #in~j; 6406#L18 assume !(~j <= 0); 6439#L20 call #t~ret3 := rec1(~j - 1);< 6440#rec1ENTRY ~i := #in~i; 6461#L12 assume !(~i <= 0); 6424#L14 call #t~ret0 := rec1(~i - 2);< 6458#rec1ENTRY ~i := #in~i; 6475#L12 assume !(~i <= 0); 6408#L14 call #t~ret0 := rec1(~i - 2);< 6407#rec1ENTRY ~i := #in~i; 6409#L12 assume ~i <= 0;#res := 0; 6495#rec1FINAL assume true; 6493#rec1EXIT >#27#return; 6417#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6423#rec1ENTRY ~i := #in~i; 6489#L12 assume ~i <= 0;#res := 0; 6488#rec1FINAL assume true; 6466#rec1EXIT >#29#return; 6467#L14-2 call #t~ret2 := rec1(#t~ret1);< 6479#rec1ENTRY ~i := #in~i; 6485#L12 assume ~i <= 0;#res := 0; 6484#rec1FINAL assume true; 6477#rec1EXIT >#31#return; 6476#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6464#rec1FINAL assume true; 6465#rec1EXIT >#27#return; 6418#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6454#rec1ENTRY [2019-11-20 04:37:24,450 INFO L796 eck$LassoCheckResult]: Loop: 6454#rec1ENTRY ~i := #in~i; 6482#L12 assume !(~i <= 0); 6422#L14 call #t~ret0 := rec1(~i - 2);< 6437#rec1ENTRY ~i := #in~i; 6481#L12 assume !(~i <= 0); 6415#L14 call #t~ret0 := rec1(~i - 2);< 6438#rec1ENTRY ~i := #in~i; 6435#L12 assume ~i <= 0;#res := 0; 6414#rec1FINAL assume true; 6416#rec1EXIT >#27#return; 6417#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6423#rec1ENTRY ~i := #in~i; 6489#L12 assume ~i <= 0;#res := 0; 6488#rec1FINAL assume true; 6466#rec1EXIT >#29#return; 6467#L14-2 call #t~ret2 := rec1(#t~ret1);< 6479#rec1ENTRY ~i := #in~i; 6485#L12 assume ~i <= 0;#res := 0; 6484#rec1FINAL assume true; 6477#rec1EXIT >#31#return; 6476#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6464#rec1FINAL assume true; 6465#rec1EXIT >#27#return; 6419#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6454#rec1ENTRY [2019-11-20 04:37:24,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:24,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2019-11-20 04:37:24,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:24,451 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912603406] [2019-11-20 04:37:24,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:24,487 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2019-11-20 04:37:24,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:24,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548781140] [2019-11-20 04:37:24,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:37:24,513 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:37:24,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2019-11-20 04:37:24,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:37:24,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838543635] [2019-11-20 04:37:24,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:37:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-20 04:37:24,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838543635] [2019-11-20 04:37:24,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214549802] [2019-11-20 04:37:24,704 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:37:24,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:37:24,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:37:24,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:37:24,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:24,776 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-20 04:37:24,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:37:24,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 11 [2019-11-20 04:37:24,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848169556] [2019-11-20 04:37:25,012 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:25,012 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:25,012 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:25,012 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:25,013 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 04:37:25,013 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,013 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:25,013 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:25,013 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2019-11-20 04:37:25,013 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:25,013 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:25,014 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,016 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,029 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,069 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:25,069 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,074 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:25,074 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:25,077 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:25,078 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:25,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:25,091 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,095 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:25,095 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,101 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:25,101 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 04:37:25,104 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 04:37:25,105 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,112 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 04:37:25,113 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 04:37:25,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 04:37:25,121 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,126 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 04:37:25,127 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 04:37:25,128 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 04:37:25,128 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 04:37:25,128 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 04:37:25,128 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 04:37:25,128 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,128 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 04:37:25,128 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 04:37:25,128 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2019-11-20 04:37:25,128 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 04:37:25,128 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 04:37:25,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,131 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,139 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 04:37:25,173 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 04:37:25,173 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,182 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:25,184 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:25,184 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:25,184 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:25,184 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:25,184 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:25,185 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:25,185 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:25,186 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,191 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:25,192 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:25,192 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:25,192 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:25,193 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:25,193 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:25,193 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:25,193 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:25,197 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,206 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 04:37:25,208 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 04:37:25,208 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 04:37:25,208 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 04:37:25,208 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 04:37:25,208 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 04:37:25,209 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 04:37:25,209 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 04:37:25,211 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 04:37:25,214 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 04:37:25,214 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f7458e1-0a32-406c-87fb-83418f2865c1/bin/uautomizer/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 04:37:25,218 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 04:37:25,218 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 04:37:25,218 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 04:37:25,218 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-20 04:37:25,219 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 04:37:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:25,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 04:37:25,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:25,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:25,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:25,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:25,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 04:37:25,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-20 04:37:25,499 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-20 04:37:25,499 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-20 04:37:25,564 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2019-11-20 04:37:25,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:25,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 04:37:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-20 04:37:25,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-20 04:37:25,565 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:25,565 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 04:37:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:25,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 04:37:25,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:25,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:25,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:25,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:25,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 04:37:25,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-20 04:37:25,814 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-20 04:37:25,814 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-20 04:37:25,918 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2019-11-20 04:37:25,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 04:37:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-20 04:37:25,921 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-20 04:37:25,921 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:25,921 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 04:37:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:25,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 04:37:25,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:26,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:26,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:26,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:26,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 04:37:26,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-20 04:37:26,227 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-20 04:37:26,228 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-20 04:37:26,536 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 257 states and 303 transitions. Complement of second has 31 states. [2019-11-20 04:37:26,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 04:37:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2019-11-20 04:37:26,541 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-20 04:37:26,542 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:26,542 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 04:37:26,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:37:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:26,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 04:37:26,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:26,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:26,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:26,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:37:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:37:26,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 04:37:26,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:37:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-20 04:37:26,743 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-20 04:37:26,743 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-20 04:37:27,324 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 409 states and 515 transitions. Complement of second has 80 states. [2019-11-20 04:37:27,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2019-11-20 04:37:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 04:37:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2019-11-20 04:37:27,330 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-20 04:37:27,330 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:27,330 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2019-11-20 04:37:27,331 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:27,331 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2019-11-20 04:37:27,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 04:37:27,332 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2019-11-20 04:37:27,339 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2019-11-20 04:37:27,344 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2019-11-20 04:37:27,344 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2019-11-20 04:37:27,345 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2019-11-20 04:37:27,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2019-11-20 04:37:27,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 04:37:27,345 INFO L688 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2019-11-20 04:37:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2019-11-20 04:37:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2019-11-20 04:37:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-11-20 04:37:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2019-11-20 04:37:27,356 INFO L711 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2019-11-20 04:37:27,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:37:27,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 04:37:27,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:37:27,357 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand 11 states. [2019-11-20 04:37:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:37:27,506 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-20 04:37:27,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 04:37:27,507 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2019-11-20 04:37:27,508 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 04:37:27,508 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2019-11-20 04:37:27,508 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 04:37:27,508 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 04:37:27,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 04:37:27,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 04:37:27,509 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 04:37:27,509 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 04:37:27,509 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 04:37:27,509 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-20 04:37:27,509 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 04:37:27,509 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 04:37:27,509 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 04:37:27,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 04:37:27 BoogieIcfgContainer [2019-11-20 04:37:27,517 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 04:37:27,517 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 04:37:27,517 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 04:37:27,517 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 04:37:27,518 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:37:05" (3/4) ... [2019-11-20 04:37:27,522 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 04:37:27,523 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 04:37:27,525 INFO L168 Benchmark]: Toolchain (without parser) took 22691.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 198.7 MB). Free memory was 944.7 MB in the beginning and 908.8 MB in the end (delta: 35.9 MB). Peak memory consumption was 234.6 MB. Max. memory is 11.5 GB. [2019-11-20 04:37:27,525 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:37:27,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -195.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 04:37:27,526 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:37:27,527 INFO L168 Benchmark]: Boogie Preprocessor took 17.24 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:37:27,527 INFO L168 Benchmark]: RCFGBuilder took 237.28 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-20 04:37:27,528 INFO L168 Benchmark]: BuchiAutomizer took 22029.71 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 908.8 MB in the end (delta: 211.6 MB). Peak memory consumption was 267.7 MB. Max. memory is 11.5 GB. [2019-11-20 04:37:27,528 INFO L168 Benchmark]: Witness Printer took 5.70 ms. Allocated memory is still 1.2 GB. Free memory is still 908.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:37:27,531 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 363.08 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -195.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 34.75 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 17.24 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 237.28 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 22029.71 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 908.8 MB in the end (delta: 211.6 MB). Peak memory consumption was 267.7 MB. Max. memory is 11.5 GB. * Witness Printer took 5.70 ms. Allocated memory is still 1.2 GB. Free memory is still 908.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3c308cf0 and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.9s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 15.4s. Construction of modules took 1.2s. Büchi inclusion checks took 4.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 284 SDtfs, 352 SDslu, 489 SDs, 0 SdLazy, 977 SolverSat, 338 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf98 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq154 hnf92 smp100 dnf100 smp100 tf111 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 18ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 11.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...