./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/Ackermann02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/Ackermann02.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd82318ec795f8c5ba1d6bd1e94de4995b910941 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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 02:12:31,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:12:31,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:12:31,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:12:31,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:12:31,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:12:31,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:12:31,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:12:31,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:12:31,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:12:31,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:12:31,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:12:31,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:12:31,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:12:31,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:12:31,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:12:31,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:12:31,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:12:31,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:12:31,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:12:31,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:12:31,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:12:31,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:12:31,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:12:31,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:12:31,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:12:31,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:12:31,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:12:31,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:12:31,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:12:31,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:12:31,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:12:31,763 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:12:31,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:12:31,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:12:31,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:12:31,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:12:31,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:12:31,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:12:31,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:12:31,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:12:31,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-20 02:12:31,788 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:12:31,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:12:31,789 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:12:31,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:12:31,790 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:12:31,790 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 02:12:31,790 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 02:12:31,791 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 02:12:31,791 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 02:12:31,791 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 02:12:31,791 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 02:12:31,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:12:31,792 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 02:12:31,792 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 02:12:31,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 02:12:31,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 02:12:31,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:12:31,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 02:12:31,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 02:12:31,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 02:12:31,794 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 02:12:31,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 02:12:31,794 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 02:12:31,795 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:12:31,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 02:12:31,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:12:31,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:12:31,796 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 02:12:31,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:12:31,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 02:12:31,796 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 02:12:31,797 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 02:12:31,798 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_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd82318ec795f8c5ba1d6bd1e94de4995b910941 [2019-11-20 02:12:31,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:12:31,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:12:31,987 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:12:31,989 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:12:31,989 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:12:31,990 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/../../sv-benchmarks/c/recursive/Ackermann02.c [2019-11-20 02:12:32,056 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/data/9b11c8e69/27013ef4ceec4d60a9641a97db6ae3b7/FLAG9c926ede1 [2019-11-20 02:12:32,462 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:12:32,462 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/sv-benchmarks/c/recursive/Ackermann02.c [2019-11-20 02:12:32,470 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/data/9b11c8e69/27013ef4ceec4d60a9641a97db6ae3b7/FLAG9c926ede1 [2019-11-20 02:12:32,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/data/9b11c8e69/27013ef4ceec4d60a9641a97db6ae3b7 [2019-11-20 02:12:32,814 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:12:32,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 02:12:32,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:12:32,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:12:32,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:12:32,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:12:32" (1/1) ... [2019-11-20 02:12:32,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79037fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:32, skipping insertion in model container [2019-11-20 02:12:32,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:12:32" (1/1) ... [2019-11-20 02:12:32,833 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:12:32,851 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:12:33,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:12:33,039 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:12:33,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:12:33,180 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:12:33,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33 WrapperNode [2019-11-20 02:12:33,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:12:33,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 02:12:33,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 02:12:33,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 02:12:33,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... [2019-11-20 02:12:33,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... [2019-11-20 02:12:33,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 02:12:33,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:12:33,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:12:33,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:12:33,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... [2019-11-20 02:12:33,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... [2019-11-20 02:12:33,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... [2019-11-20 02:12:33,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... [2019-11-20 02:12:33,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... [2019-11-20 02:12:33,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... [2019-11-20 02:12:33,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... [2019-11-20 02:12:33,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:12:33,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:12:33,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:12:33,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:12:33,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:33,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:12:33,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:12:33,322 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-20 02:12:33,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-20 02:12:33,515 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:12:33,515 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 02:12:33,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:12:33 BoogieIcfgContainer [2019-11-20 02:12:33,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:12:33,517 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 02:12:33,517 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 02:12:33,521 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 02:12:33,522 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 02:12:33,522 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 02:12:32" (1/3) ... [2019-11-20 02:12:33,524 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@215dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 02:12:33, skipping insertion in model container [2019-11-20 02:12:33,524 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 02:12:33,524 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:12:33" (2/3) ... [2019-11-20 02:12:33,524 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@215dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 02:12:33, skipping insertion in model container [2019-11-20 02:12:33,525 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 02:12:33,525 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:12:33" (3/3) ... [2019-11-20 02:12:33,527 INFO L371 chiAutomizerObserver]: Analyzing ICFG Ackermann02.c [2019-11-20 02:12:33,592 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 02:12:33,592 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 02:12:33,592 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 02:12:33,592 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:12:33,593 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:12:33,593 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 02:12:33,593 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:12:33,593 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 02:12:33,609 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-11-20 02:12:33,668 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-20 02:12:33,669 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:33,669 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:33,678 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-20 02:12:33,678 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 02:12:33,678 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 02:12:33,679 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-11-20 02:12:33,682 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-20 02:12:33,682 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:33,682 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:33,683 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-20 02:12:33,683 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 02:12:33,694 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3#L27true assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 16#L33true assume !(main_~n~0 < 0 || main_~n~0 > 23); 6#L39true call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 11#ackermannENTRYtrue [2019-11-20 02:12:33,694 INFO L796 eck$LassoCheckResult]: Loop: 11#ackermannENTRYtrue ~m := #in~m;~n := #in~n; 18#L15true assume !(0 == ~m); 12#L18true assume !(0 == ~n); 5#L21true call #t~ret1 := ackermann(~m, ~n - 1);< 11#ackermannENTRYtrue [2019-11-20 02:12:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:33,704 INFO L82 PathProgramCache]: Analyzing trace with hash 959458, now seen corresponding path program 1 times [2019-11-20 02:12:33,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:33,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205949803] [2019-11-20 02:12:33,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:33,812 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 1 times [2019-11-20 02:12:33,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:33,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113958141] [2019-11-20 02:12:33,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:33,829 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:33,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091631, now seen corresponding path program 1 times [2019-11-20 02:12:33,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:33,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879688316] [2019-11-20 02:12:33,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:33,863 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:34,015 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:34,016 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:34,016 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:34,016 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:34,017 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:34,017 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:34,017 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:34,017 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:34,018 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration1_Loop [2019-11-20 02:12:34,018 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:34,018 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:34,041 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 02:12:34,048 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 02:12:34,051 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 02:12:34,055 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 02:12:34,058 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 02:12:34,066 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 02:12:34,070 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 02:12:34,082 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 02:12:34,237 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:34,241 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:34,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,253 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 02:12:34,266 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,266 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:34,288 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,288 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:34,293 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,294 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:34,314 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,314 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 02:12:34,319 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,320 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:34,338 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,339 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 02:12:34,344 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,344 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:34,362 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,362 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 [2019-11-20 02:12:34,370 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,370 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:34,389 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,389 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 02:12:34,395 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,395 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:34,411 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,411 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:34,435 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:34,436 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:34,522 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,523 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=-4} Honda state: {ackermann_#in~n=-4} Generalized eigenvectors: [{ackermann_#in~n=-1}, {ackermann_#in~n=0}, {ackermann_#in~n=0}] Lambdas: [1, 2, 5] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:34,539 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,539 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:34,548 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,548 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=7} Honda state: {ackermann_#in~m=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:34,641 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:34,641 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:34,641 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:34,641 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:34,641 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:34,642 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:34,642 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:34,642 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:34,642 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration1_Lasso [2019-11-20 02:12:34,642 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:34,642 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:34,645 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 02:12:34,653 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 02:12:34,655 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 02:12:34,663 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 02:12:34,667 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 02:12:34,691 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 02:12:34,695 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 02:12:34,704 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 02:12:34,707 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 02:12:34,711 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 02:12:34,714 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 02:12:34,719 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 02:12:34,723 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 02:12:34,727 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 02:12:34,732 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 02:12:34,754 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 02:12:34,933 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:34,933 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:34,941 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,941 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:34,947 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,948 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:34,968 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,968 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:34,973 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,973 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:34,991 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:34,992 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:34,996 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:34,997 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5=0} Honda state: {ULTIMATE.start_main_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:35,015 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:35,016 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:35,023 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:35,024 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet4=0} Honda state: {ULTIMATE.start_main_#t~nondet4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:35,044 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:35,044 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:35,067 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:35,068 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:35,819 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:12:35,821 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:35,821 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:35,821 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:35,821 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:35,821 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:12:35,822 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:35,822 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:35,822 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:35,822 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration1_Lasso [2019-11-20 02:12:35,822 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:35,822 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:35,824 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 02:12:35,831 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 02:12:35,834 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 02:12:35,838 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:12:35,858 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 02:12:35,871 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 02:12:35,878 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 02:12:35,884 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 02:12:35,887 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 02:12:35,890 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 02:12:35,894 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 02:12:35,899 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 02:12:35,902 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 02:12:35,905 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 02:12:35,908 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 02:12:35,925 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 02:12:36,079 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:36,085 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:36,100 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:12:36,103 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:36,103 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:36,104 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:36,104 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:36,105 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:36,107 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:36,107 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:36,110 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:36,126 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 02:12:36,128 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:36,128 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:36,128 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:36,129 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:36,129 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:36,130 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:36,130 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:36,132 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:36,147 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 02:12:36,149 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:36,150 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:36,150 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:36,150 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:36,150 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:36,151 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:36,151 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:36,154 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:36,178 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 02:12:36,180 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:36,180 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:36,180 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:36,181 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:36,181 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:36,182 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:36,182 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:36,184 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:36,200 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 02:12:36,203 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:36,203 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:36,203 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-20 02:12:36,203 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:36,231 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-11-20 02:12:36,232 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-11-20 02:12:36,259 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:12:36,359 INFO L443 ModelExtractionUtils]: Simplification made 14 calls to the SMT solver. [2019-11-20 02:12:36,360 INFO L444 ModelExtractionUtils]: 0 out of 11 variables were initially zero. Simplification set additionally 8 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:36,368 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:36,375 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-11-20 02:12:36,376 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:12:36,376 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = 1*ackermann_#in~n Supporting invariants [1*ackermann_#in~n >= 0] [2019-11-20 02:12:36,391 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-20 02:12:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:36,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:12:36,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:36,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:12:36,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:36,578 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 02:12:36,597 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 02:12:36,600 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 5 states. [2019-11-20 02:12:36,883 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states.. Second operand 5 states. Result 49 states and 64 transitions. Complement of second has 13 states. [2019-11-20 02:12:36,889 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 02:12:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 02:12:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2019-11-20 02:12:36,896 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 4 letters. [2019-11-20 02:12:36,897 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:36,899 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 8 letters. Loop has 4 letters. [2019-11-20 02:12:36,899 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:36,899 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 4 letters. Loop has 8 letters. [2019-11-20 02:12:36,900 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:36,901 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 64 transitions. [2019-11-20 02:12:36,913 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-20 02:12:36,927 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 30 states and 41 transitions. [2019-11-20 02:12:36,928 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2019-11-20 02:12:36,929 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2019-11-20 02:12:36,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 41 transitions. [2019-11-20 02:12:36,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:36,932 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 41 transitions. [2019-11-20 02:12:36,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 41 transitions. [2019-11-20 02:12:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-11-20 02:12:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 02:12:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2019-11-20 02:12:36,973 INFO L711 BuchiCegarLoop]: Abstraction has 26 states and 34 transitions. [2019-11-20 02:12:36,973 INFO L591 BuchiCegarLoop]: Abstraction has 26 states and 34 transitions. [2019-11-20 02:12:36,973 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 02:12:36,974 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 34 transitions. [2019-11-20 02:12:36,977 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-20 02:12:36,977 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:36,977 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:36,978 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:36,978 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 02:12:36,979 INFO L794 eck$LassoCheckResult]: Stem: 159#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 140#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 141#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 148#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 150#ackermannENTRY ~m := #in~m;~n := #in~n; 154#L15 assume !(0 == ~m); 165#L18 assume 0 == ~n; 143#L19 call #t~ret0 := ackermann(~m - 1, 1);< 146#ackermannENTRY [2019-11-20 02:12:36,979 INFO L796 eck$LassoCheckResult]: Loop: 146#ackermannENTRY ~m := #in~m;~n := #in~n; 163#L15 assume !(0 == ~m); 162#L18 assume 0 == ~n; 145#L19 call #t~ret0 := ackermann(~m - 1, 1);< 146#ackermannENTRY [2019-11-20 02:12:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:36,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091536, now seen corresponding path program 1 times [2019-11-20 02:12:36,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:36,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442623354] [2019-11-20 02:12:36,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:37,024 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:37,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1666415, now seen corresponding path program 1 times [2019-11-20 02:12:37,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:37,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653398376] [2019-11-20 02:12:37,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:37,046 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1185130174, now seen corresponding path program 2 times [2019-11-20 02:12:37,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:37,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941893813] [2019-11-20 02:12:37,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:12:37,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941893813] [2019-11-20 02:12:37,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:12:37,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 02:12:37,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169430148] [2019-11-20 02:12:37,206 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:37,206 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:37,207 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:37,207 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:37,207 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:37,207 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,207 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:37,207 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:37,207 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration2_Loop [2019-11-20 02:12:37,207 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:37,208 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:37,209 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 02:12:37,214 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 02:12:37,217 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 02:12:37,220 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 02:12:37,223 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 02:12:37,226 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 02:12:37,240 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 02:12:37,243 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 02:12:37,338 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:37,339 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,348 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:37,349 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:37,353 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:37,353 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:37,367 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:37,367 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,372 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:37,372 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:37,390 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:37,390 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,396 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:37,396 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:37,404 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:37,404 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,409 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:37,409 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:37,420 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:37,420 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,425 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:37,425 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:37,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:37,436 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:37,451 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:37,451 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,459 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:12:37,461 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:37,461 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:37,461 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:37,461 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:37,461 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:12:37,461 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,461 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:37,461 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:37,462 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration2_Loop [2019-11-20 02:12:37,462 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:37,462 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:37,463 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 02:12:37,466 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 02:12:37,469 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 02:12:37,472 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 02:12:37,474 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 02:12:37,477 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 02:12:37,480 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 02:12:37,487 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 02:12:37,575 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:37,575 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:37,591 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:12:37,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:37,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:37,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:37,595 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:37,596 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:37,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:37,596 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,599 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:37,605 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 02:12:37,607 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:37,607 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:37,607 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:37,608 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:37,608 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:37,609 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:37,609 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,614 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:37,622 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 02:12:37,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:37,624 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:37,624 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:37,624 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:37,624 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:37,625 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:37,625 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,627 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:37,634 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 02:12:37,636 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:37,637 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:37,637 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:37,637 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:37,637 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:37,638 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:37,638 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,640 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:37,650 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 02:12:37,652 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:37,652 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:37,652 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:37,652 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:37,653 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:37,653 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:37,653 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,655 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:37,662 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 02:12:37,664 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:37,664 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:37,664 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:37,665 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:37,665 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:37,666 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:37,666 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,668 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:37,675 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 02:12:37,676 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:37,677 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:37,677 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:37,677 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:37,677 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:37,678 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:37,679 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 02:12:37,682 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:12:37,685 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 02:12:37,686 INFO L444 ModelExtractionUtils]: 0 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_d1438c99-d090-4ed9-860f-fc4050673f5a/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) [2019-11-20 02:12:37,691 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:12:37,691 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:12:37,691 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:12:37,691 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = -2*ackermann_#in~n + 1 Supporting invariants [] [2019-11-20 02:12:37,694 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:37,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:37,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:12:37,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:37,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:12:37,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:37,792 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 02:12:37,792 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 02:12:37,792 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 26 states and 34 transitions. cyclomatic complexity: 10 Second operand 4 states. [2019-11-20 02:12:37,884 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 26 states and 34 transitions. cyclomatic complexity: 10. Second operand 4 states. Result 61 states and 85 transitions. Complement of second has 13 states. [2019-11-20 02:12:37,885 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 02:12:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 02:12:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 23 transitions. [2019-11-20 02:12:37,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 8 letters. Loop has 4 letters. [2019-11-20 02:12:37,887 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:37,887 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 12 letters. Loop has 4 letters. [2019-11-20 02:12:37,888 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:37,888 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 8 letters. Loop has 8 letters. [2019-11-20 02:12:37,888 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:37,888 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 61 states and 85 transitions. [2019-11-20 02:12:37,892 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-11-20 02:12:37,895 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 61 states to 53 states and 77 transitions. [2019-11-20 02:12:37,895 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2019-11-20 02:12:37,896 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2019-11-20 02:12:37,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 77 transitions. [2019-11-20 02:12:37,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:37,896 INFO L688 BuchiCegarLoop]: Abstraction has 53 states and 77 transitions. [2019-11-20 02:12:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states and 77 transitions. [2019-11-20 02:12:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-11-20 02:12:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 02:12:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2019-11-20 02:12:37,914 INFO L711 BuchiCegarLoop]: Abstraction has 47 states and 67 transitions. [2019-11-20 02:12:37,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:12:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 02:12:37,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 02:12:37,919 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand 4 states. [2019-11-20 02:12:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:12:37,983 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2019-11-20 02:12:37,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 02:12:37,984 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 50 states and 68 transitions. [2019-11-20 02:12:37,986 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2019-11-20 02:12:37,988 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 50 states to 48 states and 66 transitions. [2019-11-20 02:12:37,988 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2019-11-20 02:12:37,989 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2019-11-20 02:12:37,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 66 transitions. [2019-11-20 02:12:37,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:37,989 INFO L688 BuchiCegarLoop]: Abstraction has 48 states and 66 transitions. [2019-11-20 02:12:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 66 transitions. [2019-11-20 02:12:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-11-20 02:12:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-20 02:12:38,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2019-11-20 02:12:38,004 INFO L711 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2019-11-20 02:12:38,004 INFO L591 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2019-11-20 02:12:38,004 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 02:12:38,004 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 58 transitions. [2019-11-20 02:12:38,009 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2019-11-20 02:12:38,010 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:38,010 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:38,011 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:38,012 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1] [2019-11-20 02:12:38,012 INFO L794 eck$LassoCheckResult]: Stem: 423#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 398#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 399#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 406#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 408#ackermannENTRY ~m := #in~m;~n := #in~n; 427#L15 assume !(0 == ~m); 429#L18 assume 0 == ~n; 413#L19 call #t~ret0 := ackermann(~m - 1, 1);< 414#ackermannENTRY [2019-11-20 02:12:38,012 INFO L796 eck$LassoCheckResult]: Loop: 414#ackermannENTRY ~m := #in~m;~n := #in~n; 416#L15 assume !(0 == ~m); 419#L18 assume !(0 == ~n); 402#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 404#ackermannENTRY ~m := #in~m;~n := #in~n; 434#L15 assume !(0 == ~m); 435#L18 assume 0 == ~n; 415#L19 call #t~ret0 := ackermann(~m - 1, 1);< 414#ackermannENTRY [2019-11-20 02:12:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:38,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1317091536, now seen corresponding path program 3 times [2019-11-20 02:12:38,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:38,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023687440] [2019-11-20 02:12:38,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:38,043 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:38,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1459432636, now seen corresponding path program 1 times [2019-11-20 02:12:38,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:38,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654586992] [2019-11-20 02:12:38,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:38,069 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:38,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:38,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1880893067, now seen corresponding path program 1 times [2019-11-20 02:12:38,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:38,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832326303] [2019-11-20 02:12:38,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:38,115 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:38,293 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:38,294 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:38,294 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:38,294 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:38,294 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:38,294 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:38,294 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:38,294 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:38,294 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration3_Loop [2019-11-20 02:12:38,294 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:38,295 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:38,296 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 02:12:38,301 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 02:12:38,308 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 02:12:38,312 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 02:12:38,315 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 02:12:38,317 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 02:12:38,320 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 02:12:38,322 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 02:12:38,405 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:38,406 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:38,417 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,417 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:38,422 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:38,422 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:38,431 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,431 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:38,437 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:38,437 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=1} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:38,455 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,455 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:38,460 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:38,460 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:38,471 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,471 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 02:12:38,476 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:38,476 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:38,483 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,483 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 [2019-11-20 02:12:38,488 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:38,488 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:38,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,500 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 02:12:38,505 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:38,505 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:38,515 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,515 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:38,520 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:38,520 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:38,528 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,528 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:38,543 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:38,543 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:38,566 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:38,567 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-8} Honda state: {ackermann_#in~m=-8} Generalized eigenvectors: [{ackermann_#in~m=0}, {ackermann_#in~m=0}, {ackermann_#in~m=-1}] Lambdas: [5, 0, 1] Nus: [1, 0] [2019-11-20 02:12:38,780 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:38,780 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:38,780 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:38,781 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:38,781 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:38,781 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:38,781 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:38,781 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:38,781 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration3_Lasso [2019-11-20 02:12:38,782 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:38,782 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:38,784 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 02:12:38,790 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 02:12:38,792 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 02:12:38,805 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 02:12:38,807 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 02:12:38,809 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 02:12:38,811 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 02:12:38,813 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 02:12:38,815 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 02:12:38,818 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 02:12:38,826 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 02:12:38,829 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 02:12:38,831 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 02:12:38,834 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 02:12:38,837 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 02:12:38,851 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 02:12:38,973 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:38,973 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:38,987 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,987 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 [2019-11-20 02:12:38,992 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:38,992 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:38,998 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:38,998 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,002 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,002 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:39,007 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,007 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,012 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,013 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=0} Honda state: {ackermann_#in~n=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,029 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,029 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,033 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,033 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet3=0} Honda state: {ULTIMATE.start_main_#t~nondet3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,052 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,052 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,059 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,059 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:39,066 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,066 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,069 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,070 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,079 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,079 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,082 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,082 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:39,087 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,087 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,090 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,090 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5=0} Honda state: {ULTIMATE.start_main_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:39,096 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,096 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,099 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,099 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,108 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,114 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,114 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:39,119 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,119 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,122 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,122 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:39,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,128 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,132 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,132 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~result~0=0} Honda state: {ULTIMATE.start_main_~result~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:39,137 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,137 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,140 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,140 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~n~0=0} Honda state: {ULTIMATE.start_main_~n~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/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 02:12:39,146 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,146 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:39,149 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:39,150 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet4=0} Honda state: {ULTIMATE.start_main_#t~nondet4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,154 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:39,154 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,179 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:39,179 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,189 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:12:39,191 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:39,192 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:39,192 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:39,192 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:39,192 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:12:39,192 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,192 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:39,192 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:39,193 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration3_Lasso [2019-11-20 02:12:39,193 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:39,193 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:39,195 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 02:12:39,200 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 02:12:39,202 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 02:12:39,211 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 02:12:39,214 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 02:12:39,216 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 02:12:39,221 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 02:12:39,223 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 02:12:39,226 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 02:12:39,229 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 02:12:39,231 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 02:12:39,234 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 02:12:39,236 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 02:12:39,250 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 02:12:39,252 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 02:12:39,255 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 02:12:39,387 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:39,387 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,399 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 02:12:39,401 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,401 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,401 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,401 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,401 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,402 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,402 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,406 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,413 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 02:12:39,415 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,415 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,415 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,415 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,415 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,416 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,416 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,419 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,427 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 02:12:39,429 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,429 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,429 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,429 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,433 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 02:12:39,433 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,439 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,447 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 02:12:39,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,449 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,450 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,450 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,450 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,454 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,463 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 02:12:39,465 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,465 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,465 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,465 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,466 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,467 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,467 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,469 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,479 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 02:12:39,481 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,481 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,481 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,482 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,482 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,482 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,483 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,485 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,495 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 02:12:39,497 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,497 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,498 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,498 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,498 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,499 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,499 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,506 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,515 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 02:12:39,517 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,517 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,517 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,518 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,518 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,518 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,519 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,521 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,527 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 02:12:39,529 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,529 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,529 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,529 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,529 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,530 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,530 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:39,531 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,536 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 02:12:39,537 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,538 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,538 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,538 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,538 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,538 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,539 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:39,540 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,545 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 02:12:39,546 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,546 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,546 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,546 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,546 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,547 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,547 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:39,550 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,563 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 02:12:39,565 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,565 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:39,565 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,565 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:39,565 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,566 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:39,566 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,568 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,579 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 02:12:39,581 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:39,581 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:39,581 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-20 02:12:39,581 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:39,596 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-11-20 02:12:39,596 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,608 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:12:39,629 INFO L443 ModelExtractionUtils]: Simplification made 12 calls to the SMT solver. [2019-11-20 02:12:39,629 INFO L444 ModelExtractionUtils]: 0 out of 11 variables were initially zero. Simplification set additionally 8 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:39,633 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:39,637 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-11-20 02:12:39,637 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:12:39,637 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~m) = 1*ackermann_#in~m Supporting invariants [1*ackermann_#in~m >= 0] [2019-11-20 02:12:39,651 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-20 02:12:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:39,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 02:12:39,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:39,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:12:39,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 02:12:39,865 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.5 stem predicates 4 loop predicates [2019-11-20 02:12:39,865 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 19 Second operand 9 states. [2019-11-20 02:12:40,120 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 19. Second operand 9 states. Result 139 states and 195 transitions. Complement of second has 32 states. [2019-11-20 02:12:40,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 5 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 02:12:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-20 02:12:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2019-11-20 02:12:40,124 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 8 letters. Loop has 8 letters. [2019-11-20 02:12:40,124 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:40,124 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 16 letters. Loop has 8 letters. [2019-11-20 02:12:40,125 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:40,125 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 8 letters. Loop has 16 letters. [2019-11-20 02:12:40,125 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:40,125 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 139 states and 195 transitions. [2019-11-20 02:12:40,131 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2019-11-20 02:12:40,134 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 139 states to 85 states and 119 transitions. [2019-11-20 02:12:40,134 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2019-11-20 02:12:40,135 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 61 [2019-11-20 02:12:40,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 119 transitions. [2019-11-20 02:12:40,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:40,135 INFO L688 BuchiCegarLoop]: Abstraction has 85 states and 119 transitions. [2019-11-20 02:12:40,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states and 119 transitions. [2019-11-20 02:12:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 69. [2019-11-20 02:12:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-20 02:12:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 98 transitions. [2019-11-20 02:12:40,144 INFO L711 BuchiCegarLoop]: Abstraction has 69 states and 98 transitions. [2019-11-20 02:12:40,144 INFO L591 BuchiCegarLoop]: Abstraction has 69 states and 98 transitions. [2019-11-20 02:12:40,144 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 02:12:40,144 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 69 states and 98 transitions. [2019-11-20 02:12:40,148 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 20 [2019-11-20 02:12:40,148 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:40,148 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:40,149 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:40,149 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 02:12:40,149 INFO L794 eck$LassoCheckResult]: Stem: 733#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 701#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 702#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 710#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 711#ackermannENTRY ~m := #in~m;~n := #in~n; 765#L15 assume !(0 == ~m); 768#L18 assume 0 == ~n; 706#L19 call #t~ret0 := ackermann(~m - 1, 1);< 714#ackermannENTRY ~m := #in~m;~n := #in~n; 746#L15 assume !(0 == ~m); 731#L18 [2019-11-20 02:12:40,149 INFO L796 eck$LassoCheckResult]: Loop: 731#L18 assume !(0 == ~n); 703#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 704#ackermannENTRY ~m := #in~m;~n := #in~n; 723#L15 assume !(0 == ~m); 731#L18 [2019-11-20 02:12:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:40,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1290385452, now seen corresponding path program 4 times [2019-11-20 02:12:40,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:40,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477949400] [2019-11-20 02:12:40,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:40,163 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:40,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:40,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1978510, now seen corresponding path program 2 times [2019-11-20 02:12:40,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:40,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569636751] [2019-11-20 02:12:40,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:40,170 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash 743855841, now seen corresponding path program 2 times [2019-11-20 02:12:40,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:40,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029393670] [2019-11-20 02:12:40,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:40,187 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:40,280 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:40,280 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:40,281 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:40,281 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:40,281 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:40,281 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:40,281 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:40,281 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:40,281 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration4_Loop [2019-11-20 02:12:40,281 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:40,282 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:40,283 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 02:12:40,290 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 02:12:40,292 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 02:12:40,301 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 02:12:40,303 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 02:12:40,305 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 02:12:40,406 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:40,406 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:40,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:40,418 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:40,422 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:40,422 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:40,429 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:40,429 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:40,434 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:40,434 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:40,446 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:40,447 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:40,467 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:40,467 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:40,611 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:40,611 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=-5, ackermann_#in~n=-7} Honda state: {ackermann_~n=-5, ackermann_#in~n=-7} Generalized eigenvectors: [{ackermann_~n=-1, ackermann_#in~n=-1}, {ackermann_~n=0, ackermann_#in~n=7}, {ackermann_~n=0, ackermann_#in~n=-5}] Lambdas: [1, 0, 0] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:40,616 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:40,616 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:40,619 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:40,619 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:40,624 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:40,624 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:40,630 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:40,630 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:40,634 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:40,634 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:40,641 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:40,641 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-7, ackermann_~m=-7} Honda state: {ackermann_#in~m=-7, ackermann_~m=-7} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2019-11-20 02:12:40,871 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:40,872 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:40,872 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:40,872 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:40,872 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:40,872 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:40,872 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:40,872 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:40,872 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration4_Lasso [2019-11-20 02:12:40,873 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:40,873 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:40,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:12:40,877 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 02:12:40,880 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 02:12:40,882 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 02:12:40,885 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 02:12:40,887 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 02:12:40,890 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 02:12:40,892 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 02:12:40,911 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 02:12:40,913 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 02:12:40,927 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 02:12:40,929 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 02:12:40,932 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 02:12:40,934 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 02:12:41,178 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:41,179 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,184 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,184 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,190 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:41,191 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5=0} Honda state: {ULTIMATE.start_main_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,199 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,199 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,206 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:41,207 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,213 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,218 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:41,218 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,226 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,226 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,230 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:41,231 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret6=0} Honda state: {ULTIMATE.start_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,237 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,237 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,242 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:41,242 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,248 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,249 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,253 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:41,253 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,263 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,263 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,268 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:41,268 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,275 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,275 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,283 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:41,283 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=0, ackermann_~m=0} Honda state: {ackermann_#in~m=2, ackermann_~m=2} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,291 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,291 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,295 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:41,296 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,303 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:41,304 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,323 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:41,323 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,531 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:12:41,532 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:41,533 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:41,533 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:41,533 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:41,533 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:12:41,533 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,533 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:41,533 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:41,533 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration4_Lasso [2019-11-20 02:12:41,533 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:41,533 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:41,535 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 02:12:41,537 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 02:12:41,539 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 02:12:41,541 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 02:12:41,543 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 02:12:41,545 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 02:12:41,547 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 02:12:41,563 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 02:12:41,565 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 02:12:41,567 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 02:12:41,577 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 02:12:41,579 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 02:12:41,591 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 02:12:41,595 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 02:12:41,775 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:41,775 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 95 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 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,780 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 02:12:41,782 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,782 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:41,782 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,783 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:41,783 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,783 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:41,783 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:41,784 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 96 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 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,789 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 02:12:41,790 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,790 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:41,790 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,790 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:41,790 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,791 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:41,791 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:41,792 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 97 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 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,796 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 02:12:41,798 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,798 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:41,798 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,798 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:41,798 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,798 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:41,799 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:41,800 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 98 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 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,804 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 02:12:41,805 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,806 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:41,806 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,806 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:41,806 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,806 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:41,807 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:41,808 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 99 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 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,812 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:12:41,813 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,813 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:41,814 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,814 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:41,814 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,814 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:41,814 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:41,816 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 100 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 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,820 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 02:12:41,821 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,821 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:41,821 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,821 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:41,821 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,822 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:41,822 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:41,826 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:41,838 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 02:12:41,840 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,841 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,841 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-20 02:12:41,841 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,851 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-11-20 02:12:41,851 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. Waiting until toolchain timeout for monitored process 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,866 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 102 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 102 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,872 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:12:41,873 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,873 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:41,874 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,874 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:41,874 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,874 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:41,874 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:41,876 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 103 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 103 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,881 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 02:12:41,882 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,882 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:41,882 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,883 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:41,883 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,883 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:41,883 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:41,884 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 104 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 104 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,889 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 02:12:41,891 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:41,891 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:41,891 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-20 02:12:41,891 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:41,900 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-11-20 02:12:41,901 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-11-20 02:12:41,921 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:12:41,945 INFO L443 ModelExtractionUtils]: Simplification made 13 calls to the SMT solver. [2019-11-20 02:12:41,945 INFO L444 ModelExtractionUtils]: 5 out of 16 variables were initially zero. Simplification set additionally 8 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 105 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 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:41,948 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:12:41,953 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-11-20 02:12:41,953 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:12:41,953 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_~n) = 1*ackermann_~n Supporting invariants [1*ackermann_~n >= 0] [2019-11-20 02:12:41,957 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-20 02:12:41,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:41,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:12:41,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:42,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:12:42,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:42,099 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 02:12:42,099 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.3 stem predicates 4 loop predicates [2019-11-20 02:12:42,100 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2019-11-20 02:12:42,130 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 70 states and 99 transitions. Complement of second has 6 states. [2019-11-20 02:12:42,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 02:12:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-20 02:12:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2019-11-20 02:12:42,131 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 4 letters. [2019-11-20 02:12:42,131 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:42,131 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:12:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:42,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:12:42,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:42,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:12:42,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:42,289 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 02:12:42,289 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.3 stem predicates 4 loop predicates [2019-11-20 02:12:42,289 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2019-11-20 02:12:42,342 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 70 states and 99 transitions. Complement of second has 6 states. [2019-11-20 02:12:42,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 02:12:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-20 02:12:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2019-11-20 02:12:42,348 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 4 letters. [2019-11-20 02:12:42,348 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:42,348 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:12:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:42,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:12:42,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:42,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:12:42,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:42,536 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 02:12:42,537 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.3 stem predicates 4 loop predicates [2019-11-20 02:12:42,537 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34 Second operand 7 states. [2019-11-20 02:12:42,719 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 69 states and 98 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 141 states and 191 transitions. Complement of second has 38 states. [2019-11-20 02:12:42,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 3 stem states 3 non-accepting loop states 2 accepting loop states [2019-11-20 02:12:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-20 02:12:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2019-11-20 02:12:42,721 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 10 letters. Loop has 4 letters. [2019-11-20 02:12:42,721 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:42,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 14 letters. Loop has 4 letters. [2019-11-20 02:12:42,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:42,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 10 letters. Loop has 8 letters. [2019-11-20 02:12:42,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:42,723 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 141 states and 191 transitions. [2019-11-20 02:12:42,727 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 34 [2019-11-20 02:12:42,731 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 141 states to 98 states and 142 transitions. [2019-11-20 02:12:42,731 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2019-11-20 02:12:42,732 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 66 [2019-11-20 02:12:42,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 142 transitions. [2019-11-20 02:12:42,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:42,733 INFO L688 BuchiCegarLoop]: Abstraction has 98 states and 142 transitions. [2019-11-20 02:12:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states and 142 transitions. [2019-11-20 02:12:42,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2019-11-20 02:12:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-20 02:12:42,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2019-11-20 02:12:42,745 INFO L711 BuchiCegarLoop]: Abstraction has 96 states and 138 transitions. [2019-11-20 02:12:42,745 INFO L591 BuchiCegarLoop]: Abstraction has 96 states and 138 transitions. [2019-11-20 02:12:42,745 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 02:12:42,745 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 96 states and 138 transitions. [2019-11-20 02:12:42,747 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 32 [2019-11-20 02:12:42,747 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:42,748 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:42,749 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:42,749 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 02:12:42,749 INFO L794 eck$LassoCheckResult]: Stem: 1316#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 1278#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1279#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 1285#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 1287#ackermannENTRY ~m := #in~m;~n := #in~n; 1296#L15 assume !(0 == ~m); 1373#L18 assume !(0 == ~n); 1284#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1286#ackermannENTRY ~m := #in~m;~n := #in~n; 1299#L15 assume 0 == ~m;#res := 1 + ~n; 1319#ackermannFINAL assume true; 1320#ackermannEXIT >#44#return; 1281#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 1283#ackermannENTRY [2019-11-20 02:12:42,749 INFO L796 eck$LassoCheckResult]: Loop: 1283#ackermannENTRY ~m := #in~m;~n := #in~n; 1372#L15 assume !(0 == ~m); 1371#L18 assume !(0 == ~n); 1280#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1283#ackermannENTRY [2019-11-20 02:12:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash 804076149, now seen corresponding path program 1 times [2019-11-20 02:12:42,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:42,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852317224] [2019-11-20 02:12:42,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 02:12:42,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852317224] [2019-11-20 02:12:42,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:12:42,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 02:12:42,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639822244] [2019-11-20 02:12:42,819 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 02:12:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 3 times [2019-11-20 02:12:42,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:42,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543537022] [2019-11-20 02:12:42,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:42,824 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:42,868 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:42,868 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:42,869 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:42,869 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:42,869 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:42,869 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:42,869 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:42,869 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:42,869 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration5_Loop [2019-11-20 02:12:42,869 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:42,869 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:42,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:12:42,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:12:42,873 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 02:12:42,875 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 02:12:42,876 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 02:12:42,881 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 02:12:42,885 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 02:12:42,887 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 02:12:42,965 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:42,965 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 106 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 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:42,968 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:42,969 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:42,972 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:42,972 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 107 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 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:42,976 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:42,976 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:42,979 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:42,979 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 108 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 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:42,983 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:42,983 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:42,986 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:42,986 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 109 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 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:42,991 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:42,991 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:42,994 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:42,994 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:43,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:43,011 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 111 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 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:43,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:43,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:43,049 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:43,050 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=-5} Honda state: {ackermann_#in~n=-5} Generalized eigenvectors: [{ackermann_#in~n=0}, {ackermann_#in~n=0}, {ackermann_#in~n=-1}] Lambdas: [1, 3, 1] Nus: [1, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 112 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 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:43,055 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:43,055 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:43,059 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:43,059 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=7} Honda state: {ackermann_#in~m=7} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 113 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 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:43,064 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:43,064 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:43,067 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:43,067 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 114 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 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:43,073 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:43,073 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:43,076 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:43,076 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2019-11-20 02:12:43,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:12:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 02:12:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 02:12:43,078 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. cyclomatic complexity: 46 Second operand 5 states. [2019-11-20 02:12:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:12:43,135 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2019-11-20 02:12:43,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 02:12:43,135 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 91 states and 122 transitions. [2019-11-20 02:12:43,138 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2019-11-20 02:12:43,141 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 91 states to 85 states and 116 transitions. [2019-11-20 02:12:43,141 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2019-11-20 02:12:43,141 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2019-11-20 02:12:43,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 116 transitions. [2019-11-20 02:12:43,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:43,142 INFO L688 BuchiCegarLoop]: Abstraction has 85 states and 116 transitions. [2019-11-20 02:12:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states and 116 transitions. [2019-11-20 02:12:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2019-11-20 02:12:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-20 02:12:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 112 transitions. [2019-11-20 02:12:43,151 INFO L711 BuchiCegarLoop]: Abstraction has 82 states and 112 transitions. [2019-11-20 02:12:43,151 INFO L591 BuchiCegarLoop]: Abstraction has 82 states and 112 transitions. [2019-11-20 02:12:43,151 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-20 02:12:43,152 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 82 states and 112 transitions. [2019-11-20 02:12:43,153 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2019-11-20 02:12:43,153 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:43,153 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:43,155 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:43,156 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:43,156 INFO L794 eck$LassoCheckResult]: Stem: 1512#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 1481#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1482#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 1489#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 1490#ackermannENTRY ~m := #in~m;~n := #in~n; 1506#L15 assume !(0 == ~m); 1509#L18 assume 0 == ~n; 1493#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1494#ackermannENTRY ~m := #in~m;~n := #in~n; 1531#L15 assume !(0 == ~m); 1559#L18 assume !(0 == ~n); 1492#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1507#ackermannENTRY ~m := #in~m;~n := #in~n; 1508#L15 assume !(0 == ~m); 1545#L18 assume 0 == ~n; 1495#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1496#ackermannENTRY ~m := #in~m;~n := #in~n; 1529#L15 assume 0 == ~m;#res := 1 + ~n; 1527#ackermannFINAL assume true; 1521#ackermannEXIT >#42#return; 1523#L19-1 #res := #t~ret0;havoc #t~ret0; 1536#ackermannFINAL assume true; 1534#ackermannEXIT >#44#return; 1484#L21-1 [2019-11-20 02:12:43,156 INFO L796 eck$LassoCheckResult]: Loop: 1484#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 1533#ackermannENTRY ~m := #in~m;~n := #in~n; 1537#L15 assume !(0 == ~m); 1538#L18 assume 0 == ~n; 1525#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1526#ackermannENTRY ~m := #in~m;~n := #in~n; 1553#L15 assume !(0 == ~m); 1552#L18 assume !(0 == ~n); 1487#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 1551#ackermannENTRY ~m := #in~m;~n := #in~n; 1548#L15 assume !(0 == ~m); 1546#L18 assume 0 == ~n; 1525#L19 call #t~ret0 := ackermann(~m - 1, 1);< 1526#ackermannENTRY ~m := #in~m;~n := #in~n; 1553#L15 assume 0 == ~m;#res := 1 + ~n; 1554#ackermannFINAL assume true; 1558#ackermannEXIT >#42#return; 1523#L19-1 #res := #t~ret0;havoc #t~ret0; 1536#ackermannFINAL assume true; 1534#ackermannEXIT >#44#return; 1484#L21-1 [2019-11-20 02:12:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:43,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1914958677, now seen corresponding path program 1 times [2019-11-20 02:12:43,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:43,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737110874] [2019-11-20 02:12:43,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:43,177 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:43,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:43,178 INFO L82 PathProgramCache]: Analyzing trace with hash -190850389, now seen corresponding path program 1 times [2019-11-20 02:12:43,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:43,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267593928] [2019-11-20 02:12:43,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:43,195 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:43,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1249696767, now seen corresponding path program 1 times [2019-11-20 02:12:43,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:43,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166136546] [2019-11-20 02:12:43,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-20 02:12:43,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166136546] [2019-11-20 02:12:43,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811258110] [2019-11-20 02:12:43,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:12:43,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:43,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 02:12:43,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-20 02:12:43,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:12:43,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 22 [2019-11-20 02:12:43,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017487414] [2019-11-20 02:12:44,056 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:44,056 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:44,056 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:44,057 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:44,057 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:44,057 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:44,057 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:44,057 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:44,057 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration6_Loop [2019-11-20 02:12:44,057 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:44,057 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:44,058 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 02:12:44,059 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 02:12:44,065 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 02:12:44,067 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 02:12:44,071 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 02:12:44,075 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 02:12:44,132 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:44,132 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 116 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 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:44,135 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:44,135 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:44,138 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:44,138 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 117 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 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:44,144 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:44,144 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 118 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 118 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:44,152 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:44,152 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:45,527 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:12:45,530 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:45,530 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:45,530 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:45,530 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:45,530 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:12:45,530 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:45,531 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:45,531 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:45,531 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration6_Loop [2019-11-20 02:12:45,531 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:45,531 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:45,532 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 02:12:45,541 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 02:12:45,543 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 02:12:45,548 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 02:12:45,555 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 02:12:45,558 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 02:12:45,618 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:45,618 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 119 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 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:45,622 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 02:12:45,623 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:45,623 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:45,623 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:45,623 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:45,623 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:45,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:45,624 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:45,630 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:45,646 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 02:12:45,648 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:45,648 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:45,649 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:45,649 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:45,649 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:45,649 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:45,650 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:45,651 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 121 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 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:45,657 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 02:12:45,659 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:45,659 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:45,659 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:45,659 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:45,660 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:45,660 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:45,661 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:45,665 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 122 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 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:45,669 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 02:12:45,671 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:45,671 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:45,671 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:45,671 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:45,671 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:45,672 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:45,672 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:45,675 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:12:45,677 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 02:12:45,677 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_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 123 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 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:45,680 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:12:45,681 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:12:45,681 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:12:45,681 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_~m) = 1*ackermann_~m Supporting invariants [] [2019-11-20 02:12:45,682 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:12:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:45,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:12:45,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:45,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:45,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 02:12:45,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 02:12:45,907 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 02:12:45,907 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33 Second operand 11 states. [2019-11-20 02:12:46,142 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33. Second operand 11 states. Result 180 states and 253 transitions. Complement of second has 31 states. [2019-11-20 02:12:46,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2019-11-20 02:12:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 02:12:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 31 transitions. [2019-11-20 02:12:46,144 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 31 transitions. Stem has 23 letters. Loop has 20 letters. [2019-11-20 02:12:46,145 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:46,145 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:12:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:46,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:12:46,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:46,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:46,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 02:12:46,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 02:12:46,365 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 02:12:46,365 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33 Second operand 11 states. [2019-11-20 02:12:46,774 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 82 states and 112 transitions. cyclomatic complexity: 33. Second operand 11 states. Result 288 states and 426 transitions. Complement of second has 49 states. [2019-11-20 02:12:46,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2019-11-20 02:12:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 02:12:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 44 transitions. [2019-11-20 02:12:46,777 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 23 letters. Loop has 20 letters. [2019-11-20 02:12:46,778 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:46,778 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 43 letters. Loop has 20 letters. [2019-11-20 02:12:46,779 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:46,779 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 44 transitions. Stem has 23 letters. Loop has 40 letters. [2019-11-20 02:12:46,780 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:46,780 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 288 states and 426 transitions. [2019-11-20 02:12:46,790 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 47 [2019-11-20 02:12:46,799 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 288 states to 227 states and 351 transitions. [2019-11-20 02:12:46,799 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 128 [2019-11-20 02:12:46,802 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 130 [2019-11-20 02:12:46,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 227 states and 351 transitions. [2019-11-20 02:12:46,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:46,804 INFO L688 BuchiCegarLoop]: Abstraction has 227 states and 351 transitions. [2019-11-20 02:12:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states and 351 transitions. [2019-11-20 02:12:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2019-11-20 02:12:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-11-20 02:12:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 327 transitions. [2019-11-20 02:12:46,850 INFO L711 BuchiCegarLoop]: Abstraction has 212 states and 327 transitions. [2019-11-20 02:12:46,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:12:46,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 02:12:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-11-20 02:12:46,852 INFO L87 Difference]: Start difference. First operand 212 states and 327 transitions. Second operand 22 states. [2019-11-20 02:12:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:12:47,843 INFO L93 Difference]: Finished difference Result 247 states and 398 transitions. [2019-11-20 02:12:47,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 02:12:47,844 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 247 states and 398 transitions. [2019-11-20 02:12:47,849 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 55 [2019-11-20 02:12:47,856 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 247 states to 245 states and 396 transitions. [2019-11-20 02:12:47,857 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 156 [2019-11-20 02:12:47,858 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 156 [2019-11-20 02:12:47,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 245 states and 396 transitions. [2019-11-20 02:12:47,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:47,859 INFO L688 BuchiCegarLoop]: Abstraction has 245 states and 396 transitions. [2019-11-20 02:12:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states and 396 transitions. [2019-11-20 02:12:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2019-11-20 02:12:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2019-11-20 02:12:47,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 360 transitions. [2019-11-20 02:12:47,884 INFO L711 BuchiCegarLoop]: Abstraction has 231 states and 360 transitions. [2019-11-20 02:12:47,884 INFO L591 BuchiCegarLoop]: Abstraction has 231 states and 360 transitions. [2019-11-20 02:12:47,884 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-20 02:12:47,885 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 231 states and 360 transitions. [2019-11-20 02:12:47,888 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 55 [2019-11-20 02:12:47,888 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:47,888 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:47,889 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:47,889 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 02:12:47,890 INFO L794 eck$LassoCheckResult]: Stem: 3151#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3091#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 3092#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 3105#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 3106#ackermannENTRY ~m := #in~m;~n := #in~n; 3195#L15 assume !(0 == ~m); 3211#L18 assume 0 == ~n; 3178#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3187#ackermannENTRY ~m := #in~m;~n := #in~n; 3185#L15 assume !(0 == ~m); 3186#L18 assume !(0 == ~n); 3137#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3180#ackermannENTRY ~m := #in~m;~n := #in~n; 3172#L15 assume !(0 == ~m); 3174#L18 assume 0 == ~n; 3136#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3138#ackermannENTRY ~m := #in~m;~n := #in~n; 3189#L15 assume 0 == ~m;#res := 1 + ~n; 3210#ackermannFINAL assume true; 3208#ackermannEXIT >#42#return; 3206#L19-1 #res := #t~ret0;havoc #t~ret0; 3204#ackermannFINAL assume true; 3202#ackermannEXIT >#44#return; 3142#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3239#ackermannENTRY ~m := #in~m;~n := #in~n; 3241#L15 assume !(0 == ~m); 3141#L18 assume !(0 == ~n); 3135#L21 [2019-11-20 02:12:47,890 INFO L796 eck$LassoCheckResult]: Loop: 3135#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3297#ackermannENTRY ~m := #in~m;~n := #in~n; 3293#L15 assume !(0 == ~m); 3294#L18 assume !(0 == ~n); 3135#L21 [2019-11-20 02:12:47,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:47,890 INFO L82 PathProgramCache]: Analyzing trace with hash 229970726, now seen corresponding path program 2 times [2019-11-20 02:12:47,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:47,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696883084] [2019-11-20 02:12:47,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-20 02:12:48,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696883084] [2019-11-20 02:12:48,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620538157] [2019-11-20 02:12:48,014 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:12:48,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:12:48,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:12:48,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 02:12:48,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-20 02:12:48,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:12:48,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-20 02:12:48,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136579790] [2019-11-20 02:12:48,095 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 02:12:48,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:48,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2228500, now seen corresponding path program 4 times [2019-11-20 02:12:48,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:48,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830948407] [2019-11-20 02:12:48,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:48,100 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:48,188 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:48,188 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:48,188 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:48,188 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:48,188 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:48,188 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:48,189 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:48,189 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:48,189 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration7_Loop [2019-11-20 02:12:48,189 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:48,189 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:48,190 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 02:12:48,192 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 02:12:48,194 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 02:12:48,196 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 02:12:48,198 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 02:12:48,205 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 02:12:48,285 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:48,285 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 125 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 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:48,293 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:48,293 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:48,296 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:48,296 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 126 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 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:48,302 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:48,302 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:48,305 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:48,306 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 127 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 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:48,311 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:48,311 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:48,314 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:48,314 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 128 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 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:48,323 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:48,323 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:48,326 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:48,326 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 129 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 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:48,330 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:48,331 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:48,336 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:48,336 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=4, ackermann_~m=4} Honda state: {ackermann_#in~m=4, ackermann_~m=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 130 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 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:48,343 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:48,343 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 131 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 131 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:48,354 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:48,354 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:50,510 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:50,510 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0, ackermann_#in~n=0} Honda state: {ackermann_~n=0, ackermann_#in~n=0} Generalized eigenvectors: [{ackermann_~n=0, ackermann_#in~n=0}, {ackermann_~n=-1, ackermann_#in~n=-1}, {ackermann_~n=0, ackermann_#in~n=0}] Lambdas: [11, 1, 4] Nus: [0, 1] [2019-11-20 02:12:50,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:12:50,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 02:12:50,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 02:12:50,512 INFO L87 Difference]: Start difference. First operand 231 states and 360 transitions. cyclomatic complexity: 135 Second operand 7 states. [2019-11-20 02:12:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:12:50,595 INFO L93 Difference]: Finished difference Result 149 states and 216 transitions. [2019-11-20 02:12:50,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 02:12:50,606 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 149 states and 216 transitions. [2019-11-20 02:12:50,610 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2019-11-20 02:12:50,613 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 149 states to 141 states and 199 transitions. [2019-11-20 02:12:50,613 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 109 [2019-11-20 02:12:50,618 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 109 [2019-11-20 02:12:50,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 199 transitions. [2019-11-20 02:12:50,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:50,619 INFO L688 BuchiCegarLoop]: Abstraction has 141 states and 199 transitions. [2019-11-20 02:12:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states and 199 transitions. [2019-11-20 02:12:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 135. [2019-11-20 02:12:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-20 02:12:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 188 transitions. [2019-11-20 02:12:50,630 INFO L711 BuchiCegarLoop]: Abstraction has 135 states and 188 transitions. [2019-11-20 02:12:50,630 INFO L591 BuchiCegarLoop]: Abstraction has 135 states and 188 transitions. [2019-11-20 02:12:50,630 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-20 02:12:50,631 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 135 states and 188 transitions. [2019-11-20 02:12:50,632 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2019-11-20 02:12:50,632 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:50,633 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:50,646 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:50,648 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [12, 11, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2] [2019-11-20 02:12:50,649 INFO L794 eck$LassoCheckResult]: Stem: 3614#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 3579#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 3580#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 3588#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 3589#ackermannENTRY ~m := #in~m;~n := #in~n; 3616#L15 assume !(0 == ~m); 3608#L18 assume !(0 == ~n); 3609#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3658#ackermannENTRY ~m := #in~m;~n := #in~n; 3656#L15 assume !(0 == ~m); 3655#L18 assume 0 == ~n; 3635#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3594#ackermannENTRY ~m := #in~m;~n := #in~n; 3672#L15 assume !(0 == ~m); 3671#L18 assume !(0 == ~n); 3591#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3637#ackermannENTRY ~m := #in~m;~n := #in~n; 3629#L15 assume !(0 == ~m); 3631#L18 assume 0 == ~n; 3595#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3596#ackermannENTRY ~m := #in~m;~n := #in~n; 3670#L15 assume 0 == ~m;#res := 1 + ~n; 3669#ackermannFINAL assume true; 3667#ackermannEXIT >#42#return; 3665#L19-1 #res := #t~ret0;havoc #t~ret0; 3664#ackermannFINAL assume true; 3663#ackermannEXIT >#44#return; 3661#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3662#ackermannENTRY ~m := #in~m;~n := #in~n; 3668#L15 assume 0 == ~m;#res := 1 + ~n; 3666#ackermannFINAL assume true; 3660#ackermannEXIT >#46#return; 3659#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 3657#ackermannFINAL assume true; 3647#ackermannEXIT >#42#return; 3645#L19-1 #res := #t~ret0;havoc #t~ret0; 3643#ackermannFINAL assume true; 3638#ackermannEXIT >#44#return; 3618#L21-1 [2019-11-20 02:12:50,649 INFO L796 eck$LassoCheckResult]: Loop: 3618#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3583#ackermannENTRY ~m := #in~m;~n := #in~n; 3632#L15 assume !(0 == ~m); 3623#L18 assume !(0 == ~n); 3619#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3583#ackermannENTRY ~m := #in~m;~n := #in~n; 3632#L15 assume !(0 == ~m); 3623#L18 assume 0 == ~n; 3586#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3648#ackermannENTRY ~m := #in~m;~n := #in~n; 3676#L15 assume !(0 == ~m); 3675#L18 assume !(0 == ~n); 3584#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3587#ackermannENTRY ~m := #in~m;~n := #in~n; 3652#L15 assume !(0 == ~m); 3653#L18 assume !(0 == ~n); 3605#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3603#ackermannENTRY ~m := #in~m;~n := #in~n; 3606#L15 assume !(0 == ~m); 3674#L18 assume !(0 == ~n); 3604#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3603#ackermannENTRY ~m := #in~m;~n := #in~n; 3606#L15 assume !(0 == ~m); 3674#L18 assume !(0 == ~n); 3604#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 3603#ackermannENTRY ~m := #in~m;~n := #in~n; 3606#L15 assume !(0 == ~m); 3673#L18 assume 0 == ~n; 3586#L19 call #t~ret0 := ackermann(~m - 1, 1);< 3648#ackermannENTRY ~m := #in~m;~n := #in~n; 3676#L15 assume 0 == ~m;#res := 1 + ~n; 3677#ackermannFINAL assume true; 3705#ackermannEXIT >#42#return; 3704#L19-1 #res := #t~ret0;havoc #t~ret0; 3679#ackermannFINAL assume true; 3680#ackermannEXIT >#44#return; 3699#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3700#ackermannENTRY ~m := #in~m;~n := #in~n; 3713#L15 assume 0 == ~m;#res := 1 + ~n; 3712#ackermannFINAL assume true; 3697#ackermannEXIT >#46#return; 3696#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 3703#ackermannFINAL assume true; 3649#ackermannEXIT >#44#return; 3601#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3599#ackermannENTRY ~m := #in~m;~n := #in~n; 3602#L15 assume 0 == ~m;#res := 1 + ~n; 3615#ackermannFINAL assume true; 3620#ackermannEXIT >#46#return; 3696#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 3703#ackermannFINAL assume true; 3649#ackermannEXIT >#44#return; 3600#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3599#ackermannENTRY ~m := #in~m;~n := #in~n; 3602#L15 assume 0 == ~m;#res := 1 + ~n; 3615#ackermannFINAL assume true; 3620#ackermannEXIT >#46#return; 3695#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 3694#ackermannFINAL assume true; 3686#ackermannEXIT >#44#return; 3685#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 3688#ackermannENTRY ~m := #in~m;~n := #in~n; 3692#L15 assume 0 == ~m;#res := 1 + ~n; 3627#ackermannFINAL assume true; 3684#ackermannEXIT >#46#return; 3642#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 3681#ackermannFINAL assume true; 3650#ackermannEXIT >#42#return; 3645#L19-1 #res := #t~ret0;havoc #t~ret0; 3643#ackermannFINAL assume true; 3638#ackermannEXIT >#44#return; 3618#L21-1 [2019-11-20 02:12:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:50,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1109551826, now seen corresponding path program 1 times [2019-11-20 02:12:50,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:50,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106228589] [2019-11-20 02:12:50,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:50,687 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:50,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2128807366, now seen corresponding path program 1 times [2019-11-20 02:12:50,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:50,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112032507] [2019-11-20 02:12:50,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 103 proven. 65 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-20 02:12:51,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112032507] [2019-11-20 02:12:51,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902576769] [2019-11-20 02:12:51,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:12:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 02:12:51,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 112 proven. 45 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2019-11-20 02:12:51,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:12:51,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2019-11-20 02:12:51,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821996522] [2019-11-20 02:12:51,149 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 02:12:51,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:12:51,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 02:12:51,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-20 02:12:51,150 INFO L87 Difference]: Start difference. First operand 135 states and 188 transitions. cyclomatic complexity: 56 Second operand 12 states. [2019-11-20 02:12:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:12:51,419 INFO L93 Difference]: Finished difference Result 199 states and 421 transitions. [2019-11-20 02:12:51,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 02:12:51,420 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 199 states and 421 transitions. [2019-11-20 02:12:51,426 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 36 [2019-11-20 02:12:51,435 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 199 states to 170 states and 329 transitions. [2019-11-20 02:12:51,435 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2019-11-20 02:12:51,436 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2019-11-20 02:12:51,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 170 states and 329 transitions. [2019-11-20 02:12:51,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:51,447 INFO L688 BuchiCegarLoop]: Abstraction has 170 states and 329 transitions. [2019-11-20 02:12:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states and 329 transitions. [2019-11-20 02:12:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 118. [2019-11-20 02:12:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-20 02:12:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 160 transitions. [2019-11-20 02:12:51,474 INFO L711 BuchiCegarLoop]: Abstraction has 118 states and 160 transitions. [2019-11-20 02:12:51,474 INFO L591 BuchiCegarLoop]: Abstraction has 118 states and 160 transitions. [2019-11-20 02:12:51,474 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-20 02:12:51,474 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 118 states and 160 transitions. [2019-11-20 02:12:51,476 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 28 [2019-11-20 02:12:51,476 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:51,476 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:51,521 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:51,521 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [15, 12, 11, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 3] [2019-11-20 02:12:51,521 INFO L794 eck$LassoCheckResult]: Stem: 4452#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 4416#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 4417#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 4425#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 4426#ackermannENTRY ~m := #in~m;~n := #in~n; 4476#L15 assume !(0 == ~m); 4477#L18 assume 0 == ~n; 4470#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4473#ackermannENTRY ~m := #in~m;~n := #in~n; 4469#L15 assume !(0 == ~m); 4472#L18 assume !(0 == ~n); 4462#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4467#ackermannENTRY ~m := #in~m;~n := #in~n; 4465#L15 assume !(0 == ~m); 4466#L18 assume !(0 == ~n); 4433#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4468#ackermannENTRY ~m := #in~m;~n := #in~n; 4520#L15 assume !(0 == ~m); 4519#L18 assume 0 == ~n; 4440#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4441#ackermannENTRY ~m := #in~m;~n := #in~n; 4469#L15 assume !(0 == ~m); 4472#L18 assume !(0 == ~n); 4462#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4467#ackermannENTRY ~m := #in~m;~n := #in~n; 4465#L15 assume !(0 == ~m); 4461#L18 assume 0 == ~n; 4463#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4441#ackermannENTRY ~m := #in~m;~n := #in~n; 4474#L15 assume 0 == ~m;#res := 1 + ~n; 4494#ackermannFINAL assume true; 4486#ackermannEXIT >#42#return; 4487#L19-1 #res := #t~ret0;havoc #t~ret0; 4516#ackermannFINAL assume true; 4509#ackermannEXIT >#44#return; 4507#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4508#ackermannENTRY ~m := #in~m;~n := #in~n; 4518#L15 assume 0 == ~m;#res := 1 + ~n; 4517#ackermannFINAL assume true; 4506#ackermannEXIT >#46#return; 4504#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4500#ackermannFINAL assume true; 4491#ackermannEXIT >#42#return; 4490#L19-1 #res := #t~ret0;havoc #t~ret0; 4531#ackermannFINAL assume true; 4529#ackermannEXIT >#44#return; 4429#L21-1 [2019-11-20 02:12:51,524 INFO L796 eck$LassoCheckResult]: Loop: 4429#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4421#ackermannENTRY ~m := #in~m;~n := #in~n; 4464#L15 assume !(0 == ~m); 4460#L18 assume 0 == ~n; 4438#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4439#ackermannENTRY ~m := #in~m;~n := #in~n; 4482#L15 assume !(0 == ~m); 4447#L18 assume !(0 == ~n); 4423#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4502#ackermannENTRY ~m := #in~m;~n := #in~n; 4512#L15 assume !(0 == ~m); 4513#L18 assume !(0 == ~n); 4422#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4424#ackermannENTRY ~m := #in~m;~n := #in~n; 4446#L15 assume !(0 == ~m); 4456#L18 assume 0 == ~n; 4438#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4439#ackermannENTRY ~m := #in~m;~n := #in~n; 4482#L15 assume !(0 == ~m); 4447#L18 assume !(0 == ~n); 4423#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4502#ackermannENTRY ~m := #in~m;~n := #in~n; 4512#L15 assume !(0 == ~m); 4511#L18 assume 0 == ~n; 4448#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4439#ackermannENTRY ~m := #in~m;~n := #in~n; 4482#L15 assume !(0 == ~m); 4447#L18 assume !(0 == ~n); 4423#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4502#ackermannENTRY ~m := #in~m;~n := #in~n; 4512#L15 assume !(0 == ~m); 4511#L18 assume 0 == ~n; 4448#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4439#ackermannENTRY ~m := #in~m;~n := #in~n; 4482#L15 assume 0 == ~m;#res := 1 + ~n; 4483#ackermannFINAL assume true; 4484#ackermannEXIT >#42#return; 4485#L19-1 #res := #t~ret0;havoc #t~ret0; 4505#ackermannFINAL assume true; 4501#ackermannEXIT >#44#return; 4496#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4498#ackermannENTRY ~m := #in~m;~n := #in~n; 4524#L15 assume 0 == ~m;#res := 1 + ~n; 4523#ackermannFINAL assume true; 4495#ackermannEXIT >#46#return; 4493#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4492#ackermannFINAL assume true; 4488#ackermannEXIT >#42#return; 4489#L19-1 #res := #t~ret0;havoc #t~ret0; 4522#ackermannFINAL assume true; 4503#ackermannEXIT >#44#return; 4420#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4499#ackermannENTRY ~m := #in~m;~n := #in~n; 4514#L15 assume !(0 == ~m); 4510#L18 assume 0 == ~n; 4448#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4439#ackermannENTRY ~m := #in~m;~n := #in~n; 4482#L15 assume !(0 == ~m); 4447#L18 assume !(0 == ~n); 4423#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 4502#ackermannENTRY ~m := #in~m;~n := #in~n; 4512#L15 assume !(0 == ~m); 4511#L18 assume 0 == ~n; 4448#L19 call #t~ret0 := ackermann(~m - 1, 1);< 4439#ackermannENTRY ~m := #in~m;~n := #in~n; 4482#L15 assume 0 == ~m;#res := 1 + ~n; 4483#ackermannFINAL assume true; 4484#ackermannEXIT >#42#return; 4485#L19-1 #res := #t~ret0;havoc #t~ret0; 4505#ackermannFINAL assume true; 4501#ackermannEXIT >#44#return; 4496#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 4498#ackermannENTRY ~m := #in~m;~n := #in~n; 4524#L15 assume 0 == ~m;#res := 1 + ~n; 4523#ackermannFINAL assume true; 4495#ackermannEXIT >#46#return; 4493#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4492#ackermannFINAL assume true; 4488#ackermannEXIT >#42#return; 4489#L19-1 #res := #t~ret0;havoc #t~ret0; 4522#ackermannFINAL assume true; 4503#ackermannEXIT >#46#return; 4493#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 4492#ackermannFINAL assume true; 4488#ackermannEXIT >#42#return; 4490#L19-1 #res := #t~ret0;havoc #t~ret0; 4531#ackermannFINAL assume true; 4529#ackermannEXIT >#44#return; 4429#L21-1 [2019-11-20 02:12:51,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:51,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1566968233, now seen corresponding path program 2 times [2019-11-20 02:12:51,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:51,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958446507] [2019-11-20 02:12:51,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-20 02:12:51,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958446507] [2019-11-20 02:12:51,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971305991] [2019-11-20 02:12:51,640 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:12:51,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:12:51,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:12:51,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:12:51,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-20 02:12:51,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:12:51,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-20 02:12:51,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891501900] [2019-11-20 02:12:51,726 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 02:12:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:51,727 INFO L82 PathProgramCache]: Analyzing trace with hash -857449282, now seen corresponding path program 2 times [2019-11-20 02:12:51,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:51,727 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698329566] [2019-11-20 02:12:51,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 39 proven. 92 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2019-11-20 02:12:51,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698329566] [2019-11-20 02:12:51,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847003613] [2019-11-20 02:12:51,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:12:51,932 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:12:51,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:12:51,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:12:51,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 39 proven. 92 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2019-11-20 02:12:51,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:12:51,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-20 02:12:51,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671885160] [2019-11-20 02:12:51,965 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 02:12:51,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:12:51,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 02:12:51,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:12:51,966 INFO L87 Difference]: Start difference. First operand 118 states and 160 transitions. cyclomatic complexity: 45 Second operand 10 states. [2019-11-20 02:12:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:12:52,104 INFO L93 Difference]: Finished difference Result 135 states and 196 transitions. [2019-11-20 02:12:52,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 02:12:52,105 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 196 transitions. [2019-11-20 02:12:52,108 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 29 [2019-11-20 02:12:52,111 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 135 states and 194 transitions. [2019-11-20 02:12:52,111 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 106 [2019-11-20 02:12:52,112 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2019-11-20 02:12:52,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 135 states and 194 transitions. [2019-11-20 02:12:52,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:52,112 INFO L688 BuchiCegarLoop]: Abstraction has 135 states and 194 transitions. [2019-11-20 02:12:52,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states and 194 transitions. [2019-11-20 02:12:52,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 110. [2019-11-20 02:12:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-20 02:12:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 144 transitions. [2019-11-20 02:12:52,122 INFO L711 BuchiCegarLoop]: Abstraction has 110 states and 144 transitions. [2019-11-20 02:12:52,122 INFO L591 BuchiCegarLoop]: Abstraction has 110 states and 144 transitions. [2019-11-20 02:12:52,122 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-11-20 02:12:52,123 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 110 states and 144 transitions. [2019-11-20 02:12:52,124 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 25 [2019-11-20 02:12:52,124 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:52,124 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:52,126 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:52,126 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [13, 12, 9, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3] [2019-11-20 02:12:52,126 INFO L794 eck$LassoCheckResult]: Stem: 5487#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 5455#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 5456#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 5463#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 5464#ackermannENTRY ~m := #in~m;~n := #in~n; 5489#L15 assume !(0 == ~m); 5491#L18 assume !(0 == ~n); 5490#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5518#ackermannENTRY ~m := #in~m;~n := #in~n; 5519#L15 assume !(0 == ~m); 5534#L18 assume 0 == ~n; 5510#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5513#ackermannENTRY ~m := #in~m;~n := #in~n; 5508#L15 assume !(0 == ~m); 5511#L18 assume !(0 == ~n); 5497#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5524#ackermannENTRY ~m := #in~m;~n := #in~n; 5536#L15 assume !(0 == ~m); 5496#L18 assume 0 == ~n; 5498#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5474#ackermannENTRY ~m := #in~m;~n := #in~n; 5512#L15 assume 0 == ~m;#res := 1 + ~n; 5557#ackermannFINAL assume true; 5556#ackermannEXIT >#42#return; 5555#L19-1 #res := #t~ret0;havoc #t~ret0; 5554#ackermannFINAL assume true; 5553#ackermannEXIT >#44#return; 5538#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5539#ackermannENTRY ~m := #in~m;~n := #in~n; 5541#L15 assume 0 == ~m;#res := 1 + ~n; 5540#ackermannFINAL assume true; 5537#ackermannEXIT >#46#return; 5535#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5533#ackermannFINAL assume true; 5532#ackermannEXIT >#42#return; 5531#L19-1 #res := #t~ret0;havoc #t~ret0; 5558#ackermannFINAL assume true; 5520#ackermannEXIT >#44#return; 5470#L21-1 [2019-11-20 02:12:52,127 INFO L796 eck$LassoCheckResult]: Loop: 5470#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5459#ackermannENTRY ~m := #in~m;~n := #in~n; 5499#L15 assume !(0 == ~m); 5501#L18 assume !(0 == ~n); 5469#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5459#ackermannENTRY ~m := #in~m;~n := #in~n; 5499#L15 assume !(0 == ~m); 5501#L18 assume 0 == ~n; 5467#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5471#ackermannENTRY ~m := #in~m;~n := #in~n; 5526#L15 assume !(0 == ~m); 5482#L18 assume !(0 == ~n); 5461#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5525#ackermannENTRY ~m := #in~m;~n := #in~n; 5542#L15 assume !(0 == ~m); 5516#L18 assume 0 == ~n; 5483#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5471#ackermannENTRY ~m := #in~m;~n := #in~n; 5526#L15 assume !(0 == ~m); 5482#L18 assume !(0 == ~n); 5461#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5525#ackermannENTRY ~m := #in~m;~n := #in~n; 5542#L15 assume !(0 == ~m); 5516#L18 assume 0 == ~n; 5483#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5471#ackermannENTRY ~m := #in~m;~n := #in~n; 5526#L15 assume 0 == ~m;#res := 1 + ~n; 5527#ackermannFINAL assume true; 5552#ackermannEXIT >#42#return; 5551#L19-1 #res := #t~ret0;havoc #t~ret0; 5550#ackermannFINAL assume true; 5548#ackermannEXIT >#44#return; 5545#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5546#ackermannENTRY ~m := #in~m;~n := #in~n; 5549#L15 assume 0 == ~m;#res := 1 + ~n; 5547#ackermannFINAL assume true; 5544#ackermannEXIT >#46#return; 5523#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5543#ackermannFINAL assume true; 5530#ackermannEXIT >#42#return; 5529#L19-1 #res := #t~ret0;havoc #t~ret0; 5528#ackermannFINAL assume true; 5522#ackermannEXIT >#44#return; 5458#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5505#ackermannENTRY ~m := #in~m;~n := #in~n; 5506#L15 assume !(0 == ~m); 5495#L18 assume 0 == ~n; 5483#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5471#ackermannENTRY ~m := #in~m;~n := #in~n; 5526#L15 assume !(0 == ~m); 5482#L18 assume !(0 == ~n); 5461#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 5525#ackermannENTRY ~m := #in~m;~n := #in~n; 5542#L15 assume !(0 == ~m); 5516#L18 assume 0 == ~n; 5483#L19 call #t~ret0 := ackermann(~m - 1, 1);< 5471#ackermannENTRY ~m := #in~m;~n := #in~n; 5526#L15 assume 0 == ~m;#res := 1 + ~n; 5527#ackermannFINAL assume true; 5552#ackermannEXIT >#42#return; 5551#L19-1 #res := #t~ret0;havoc #t~ret0; 5550#ackermannFINAL assume true; 5548#ackermannEXIT >#44#return; 5545#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 5546#ackermannENTRY ~m := #in~m;~n := #in~n; 5549#L15 assume 0 == ~m;#res := 1 + ~n; 5547#ackermannFINAL assume true; 5544#ackermannEXIT >#46#return; 5523#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5543#ackermannFINAL assume true; 5530#ackermannEXIT >#42#return; 5529#L19-1 #res := #t~ret0;havoc #t~ret0; 5528#ackermannFINAL assume true; 5522#ackermannEXIT >#46#return; 5523#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 5543#ackermannFINAL assume true; 5530#ackermannEXIT >#42#return; 5531#L19-1 #res := #t~ret0;havoc #t~ret0; 5558#ackermannFINAL assume true; 5520#ackermannEXIT >#44#return; 5470#L21-1 [2019-11-20 02:12:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:52,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1109551826, now seen corresponding path program 3 times [2019-11-20 02:12:52,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:52,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681896296] [2019-11-20 02:12:52,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:52,148 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -817628327, now seen corresponding path program 3 times [2019-11-20 02:12:52,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:52,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337552859] [2019-11-20 02:12:52,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 125 proven. 113 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-20 02:12:52,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337552859] [2019-11-20 02:12:52,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667489597] [2019-11-20 02:12:52,721 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:12:52,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-20 02:12:52,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:12:52,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 02:12:52,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 126 proven. 108 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-20 02:12:52,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:12:52,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 29 [2019-11-20 02:12:52,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279296467] [2019-11-20 02:12:52,991 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 02:12:52,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:12:52,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 02:12:52,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2019-11-20 02:12:52,992 INFO L87 Difference]: Start difference. First operand 110 states and 144 transitions. cyclomatic complexity: 37 Second operand 29 states. [2019-11-20 02:12:54,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:12:54,432 INFO L93 Difference]: Finished difference Result 165 states and 229 transitions. [2019-11-20 02:12:54,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-20 02:12:54,433 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 165 states and 229 transitions. [2019-11-20 02:12:54,435 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 29 [2019-11-20 02:12:54,438 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 165 states to 164 states and 226 transitions. [2019-11-20 02:12:54,438 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 139 [2019-11-20 02:12:54,439 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2019-11-20 02:12:54,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 164 states and 226 transitions. [2019-11-20 02:12:54,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:54,439 INFO L688 BuchiCegarLoop]: Abstraction has 164 states and 226 transitions. [2019-11-20 02:12:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states and 226 transitions. [2019-11-20 02:12:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2019-11-20 02:12:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-20 02:12:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 205 transitions. [2019-11-20 02:12:54,447 INFO L711 BuchiCegarLoop]: Abstraction has 150 states and 205 transitions. [2019-11-20 02:12:54,447 INFO L591 BuchiCegarLoop]: Abstraction has 150 states and 205 transitions. [2019-11-20 02:12:54,448 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-11-20 02:12:54,448 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 150 states and 205 transitions. [2019-11-20 02:12:54,449 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 29 [2019-11-20 02:12:54,450 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:54,450 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:54,450 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 02:12:54,451 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 02:12:54,451 INFO L794 eck$LassoCheckResult]: Stem: 6386#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 6344#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 6345#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 6354#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 6355#ackermannENTRY ~m := #in~m;~n := #in~n; 6417#L15 assume !(0 == ~m); 6416#L18 assume 0 == ~n; 6393#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6415#ackermannENTRY ~m := #in~m;~n := #in~n; 6390#L15 assume !(0 == ~m); 6394#L18 assume !(0 == ~n); 6399#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6428#ackermannENTRY ~m := #in~m;~n := #in~n; 6454#L15 assume !(0 == ~m); 6398#L18 assume 0 == ~n; 6391#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6370#ackermannENTRY ~m := #in~m;~n := #in~n; 6390#L15 assume !(0 == ~m); 6394#L18 assume !(0 == ~n); 6399#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6428#ackermannENTRY ~m := #in~m;~n := #in~n; 6454#L15 assume !(0 == ~m); 6398#L18 assume 0 == ~n; 6391#L19 call #t~ret0 := ackermann(~m - 1, 1);< 6370#ackermannENTRY ~m := #in~m;~n := #in~n; 6414#L15 assume 0 == ~m;#res := 1 + ~n; 6466#ackermannFINAL assume true; 6464#ackermannEXIT >#42#return; 6462#L19-1 #res := #t~ret0;havoc #t~ret0; 6461#ackermannFINAL assume true; 6449#ackermannEXIT >#44#return; 6446#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 6447#ackermannENTRY ~m := #in~m;~n := #in~n; 6465#L15 assume 0 == ~m;#res := 1 + ~n; 6463#ackermannFINAL assume true; 6445#ackermannEXIT >#46#return; 6443#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 6441#ackermannFINAL assume true; 6433#ackermannEXIT >#42#return; 6431#L19-1 #res := #t~ret0;havoc #t~ret0; 6429#ackermannFINAL assume true; 6427#ackermannEXIT >#44#return; 6382#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 6426#ackermannENTRY ~m := #in~m;~n := #in~n; 6425#L15 assume !(0 == ~m); 6381#L18 assume !(0 == ~n); 6360#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6423#ackermannENTRY [2019-11-20 02:12:54,451 INFO L796 eck$LassoCheckResult]: Loop: 6423#ackermannENTRY ~m := #in~m;~n := #in~n; 6424#L15 assume !(0 == ~m); 6491#L18 assume !(0 == ~n); 6361#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 6423#ackermannENTRY [2019-11-20 02:12:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2042677982, now seen corresponding path program 4 times [2019-11-20 02:12:54,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:54,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847320302] [2019-11-20 02:12:54,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:54,471 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:54,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:54,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1666510, now seen corresponding path program 5 times [2019-11-20 02:12:54,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:54,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443627090] [2019-11-20 02:12:54,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:54,476 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:54,477 INFO L82 PathProgramCache]: Analyzing trace with hash -997227989, now seen corresponding path program 5 times [2019-11-20 02:12:54,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:54,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672369053] [2019-11-20 02:12:54,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:12:54,497 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:12:54,556 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:54,556 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:54,557 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:54,557 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:54,557 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:54,557 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:54,557 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:54,557 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:54,557 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration11_Loop [2019-11-20 02:12:54,557 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:54,557 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:54,558 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 02:12:54,562 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 02:12:54,571 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 02:12:54,574 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 02:12:54,576 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 02:12:54,579 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 02:12:54,581 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 02:12:54,583 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 02:12:54,668 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:54,668 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 136 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:54,673 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:54,673 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 136 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:54,677 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:54,677 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 137 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:54,686 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:54,686 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 137 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 138 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:54,696 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:54,696 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 138 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:54,720 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:54,720 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~n=-5} Honda state: {ackermann_#in~n=-5} Generalized eigenvectors: [{ackermann_#in~n=0}, {ackermann_#in~n=0}, {ackermann_#in~n=-1}] Lambdas: [1, 3, 1] Nus: [1, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 139 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:54,726 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:54,726 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 139 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:54,734 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:54,734 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 140 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:54,743 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:54,743 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 140 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:54,747 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:54,747 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 141 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:54,753 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:54,753 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 141 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:54,757 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:54,757 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 142 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:54,763 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:54,763 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 142 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:54,767 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:54,767 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~n=0} Honda state: {ackermann_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 143 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:54,773 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:54,773 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 143 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:54,777 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:54,778 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 144 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:54,787 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:54,787 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 144 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:54,792 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:54,792 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=-5} Honda state: {ackermann_#in~m=-5} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2019-11-20 02:12:55,346 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:55,346 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:55,346 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:55,346 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:55,346 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:12:55,346 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,346 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:55,346 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:55,346 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration11_Lasso [2019-11-20 02:12:55,346 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:55,346 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:55,347 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 02:12:55,349 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 02:12:55,350 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 02:12:55,352 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 02:12:55,359 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 02:12:55,360 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 02:12:55,365 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 02:12:55,366 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 02:12:55,368 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 02:12:55,369 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 02:12:55,372 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 02:12:55,373 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 02:12:55,375 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 02:12:55,376 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 02:12:55,381 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 02:12:55,382 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 02:12:55,463 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:55,464 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 145 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 145 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,466 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,467 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,469 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,469 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_~m=0} Honda state: {ackermann_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 146 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 146 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,474 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,476 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,476 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret2=0} Honda state: {ackermann_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 147 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 147 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,480 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,483 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,483 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~m~0=0} Honda state: {ULTIMATE.start_main_~m~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 148 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 148 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,487 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,487 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,490 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,490 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 149 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 149 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,495 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,495 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,497 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,497 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 150 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 150 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,502 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,503 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,506 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,506 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#in~m=0} Honda state: {ackermann_#in~m=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 151 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 151 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,510 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,510 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,514 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,514 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret5=0} Honda state: {ULTIMATE.start_main_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 152 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 152 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,523 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,526 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,526 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret6=0} Honda state: {ULTIMATE.start_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 153 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 153 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,530 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,530 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,533 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,533 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~result~0=0} Honda state: {ULTIMATE.start_main_~result~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 154 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 154 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,537 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,537 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,540 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,540 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 155 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 155 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,545 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,545 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,549 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,549 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~n~0=0} Honda state: {ULTIMATE.start_main_~n~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 156 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 156 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,553 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,554 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,556 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,557 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 157 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,574 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,575 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 157 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,578 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:12:55,579 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet4=0} Honda state: {ULTIMATE.start_main_#t~nondet4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 158 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 158 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,586 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:12:55,586 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 159 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 159 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,593 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:12:55,593 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:12:55,599 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:12:55,600 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:12:55,600 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:12:55,600 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:12:55,600 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:12:55,600 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:12:55,601 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,601 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:12:55,601 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:12:55,601 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration11_Lasso [2019-11-20 02:12:55,601 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:12:55,601 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:12:55,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 02:12:55,608 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 02:12:55,611 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 02:12:55,613 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 02:12:55,618 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 02:12:55,620 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 02:12:55,622 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 02:12:55,623 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 02:12:55,625 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 02:12:55,627 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 02:12:55,628 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 02:12:55,630 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 02:12:55,642 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 02:12:55,644 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 02:12:55,647 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 02:12:55,652 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 02:12:55,728 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:12:55,728 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 160 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,732 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 02:12:55,734 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,734 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,734 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,734 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,734 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,736 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,736 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 160 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,738 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 161 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 161 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,744 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 02:12:55,745 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,745 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,746 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,746 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,746 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,746 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,746 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:55,747 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 162 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 162 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,751 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 02:12:55,752 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,752 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,753 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,753 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,753 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,753 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,753 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:12:55,754 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 163 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 163 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,759 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 02:12:55,760 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,760 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,761 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-20 02:12:55,761 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,765 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-11-20 02:12:55,765 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-11-20 02:12:55,778 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 164 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,791 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 02:12:55,792 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,793 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,793 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,793 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,793 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,794 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 164 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,795 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 165 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,803 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 02:12:55,804 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,805 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,805 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,805 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,805 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,805 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,806 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 165 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,807 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 166 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,815 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 02:12:55,817 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,817 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,817 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,817 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,817 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,818 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,818 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 166 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,819 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 167 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,825 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 02:12:55,827 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,827 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,827 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,828 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,828 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,828 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,828 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 167 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,830 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 168 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,836 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 02:12:55,838 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,838 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,838 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,838 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,838 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,839 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,839 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 168 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,841 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 169 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,851 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 02:12:55,852 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,853 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,853 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,853 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,853 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,854 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,854 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 169 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,855 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 170 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,863 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 02:12:55,864 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,865 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,865 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,865 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,865 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,865 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,866 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 170 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,867 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 171 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,873 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 02:12:55,875 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,875 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,875 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,875 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,876 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,876 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,876 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 171 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,878 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 172 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,884 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 02:12:55,885 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,886 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,886 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,886 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,886 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,887 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,887 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 172 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,888 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 173 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,899 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 02:12:55,901 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,901 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:12:55,901 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,901 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:12:55,901 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:12:55,902 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:12:55,902 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 173 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,904 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 174 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:55,951 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 02:12:55,952 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:12:55,952 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:12:55,952 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-20 02:12:55,953 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 174 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:55,958 INFO L401 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-11-20 02:12:55,958 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-11-20 02:12:55,973 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:12:55,998 INFO L443 ModelExtractionUtils]: Simplification made 12 calls to the SMT solver. [2019-11-20 02:12:55,998 INFO L444 ModelExtractionUtils]: 1 out of 11 variables were initially zero. Simplification set additionally 7 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 175 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:12:56,002 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 175 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:12:56,007 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-11-20 02:12:56,007 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:12:56,007 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#in~n) = 1*ackermann_#in~n Supporting invariants [1*ackermann_#in~n >= 0] [2019-11-20 02:12:56,011 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-20 02:12:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:56,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-20 02:12:56,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:56,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:56,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:12:56,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:56,406 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 02:12:56,406 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.13 stem predicates 3 loop predicates [2019-11-20 02:12:56,406 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 150 states and 205 transitions. cyclomatic complexity: 59 Second operand 16 states. [2019-11-20 02:12:56,512 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 150 states and 205 transitions. cyclomatic complexity: 59. Second operand 16 states. Result 159 states and 221 transitions. Complement of second has 7 states. [2019-11-20 02:12:56,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 3 stem states 0 non-accepting loop states 1 accepting loop states [2019-11-20 02:12:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-20 02:12:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-20 02:12:56,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 47 letters. Loop has 4 letters. [2019-11-20 02:12:56,513 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:56,513 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:12:56,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:56,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-20 02:12:56,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:56,673 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:56,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:12:56,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:56,974 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 02:12:56,974 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.13 stem predicates 3 loop predicates [2019-11-20 02:12:56,974 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 150 states and 205 transitions. cyclomatic complexity: 59 Second operand 16 states. [2019-11-20 02:12:57,093 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 150 states and 205 transitions. cyclomatic complexity: 59. Second operand 16 states. Result 159 states and 221 transitions. Complement of second has 7 states. [2019-11-20 02:12:57,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 3 stem states 0 non-accepting loop states 1 accepting loop states [2019-11-20 02:12:57,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-20 02:12:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-20 02:12:57,094 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 47 letters. Loop has 4 letters. [2019-11-20 02:12:57,094 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:57,094 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:12:57,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:57,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-20 02:12:57,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:57,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:57,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:57,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:57,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:57,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:57,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:12:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:57,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:12:57,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:57,481 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 02:12:57,481 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.13 stem predicates 3 loop predicates [2019-11-20 02:12:57,481 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 150 states and 205 transitions. cyclomatic complexity: 59 Second operand 16 states. [2019-11-20 02:12:58,801 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 150 states and 205 transitions. cyclomatic complexity: 59. Second operand 16 states. Result 463 states and 694 transitions. Complement of second has 64 states. [2019-11-20 02:12:58,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 25 states 20 stem states 2 non-accepting loop states 2 accepting loop states [2019-11-20 02:12:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-20 02:12:58,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 70 transitions. [2019-11-20 02:12:58,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 70 transitions. Stem has 47 letters. Loop has 4 letters. [2019-11-20 02:12:58,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:58,805 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 70 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-20 02:12:58,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:58,805 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 25 states and 70 transitions. Stem has 47 letters. Loop has 8 letters. [2019-11-20 02:12:58,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:12:58,806 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 463 states and 694 transitions. [2019-11-20 02:12:58,814 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 46 [2019-11-20 02:12:58,819 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 463 states to 259 states and 337 transitions. [2019-11-20 02:12:58,819 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2019-11-20 02:12:58,820 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 217 [2019-11-20 02:12:58,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 259 states and 337 transitions. [2019-11-20 02:12:58,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:12:58,821 INFO L688 BuchiCegarLoop]: Abstraction has 259 states and 337 transitions. [2019-11-20 02:12:58,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states and 337 transitions. [2019-11-20 02:12:58,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 240. [2019-11-20 02:12:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2019-11-20 02:12:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 311 transitions. [2019-11-20 02:12:58,831 INFO L711 BuchiCegarLoop]: Abstraction has 240 states and 311 transitions. [2019-11-20 02:12:58,831 INFO L591 BuchiCegarLoop]: Abstraction has 240 states and 311 transitions. [2019-11-20 02:12:58,832 INFO L424 BuchiCegarLoop]: ======== Iteration 12============ [2019-11-20 02:12:58,832 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 240 states and 311 transitions. [2019-11-20 02:12:58,834 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 46 [2019-11-20 02:12:58,834 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:12:58,834 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:12:58,836 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [15, 13, 10, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2019-11-20 02:12:58,836 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [16, 13, 11, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 4] [2019-11-20 02:12:58,836 INFO L794 eck$LassoCheckResult]: Stem: 7965#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 7933#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 7934#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 7943#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 7944#ackermannENTRY ~m := #in~m;~n := #in~n; 7993#L15 assume !(0 == ~m); 7996#L18 assume !(0 == ~n); 7989#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7994#ackermannENTRY ~m := #in~m;~n := #in~n; 7995#L15 assume !(0 == ~m); 8053#L18 assume !(0 == ~n); 7990#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7994#ackermannENTRY ~m := #in~m;~n := #in~n; 7991#L15 assume !(0 == ~m); 7988#L18 assume 0 == ~n; 7984#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7987#ackermannENTRY ~m := #in~m;~n := #in~n; 7985#L15 assume !(0 == ~m); 7982#L18 assume !(0 == ~n); 7974#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7979#ackermannENTRY ~m := #in~m;~n := #in~n; 7980#L15 assume !(0 == ~m); 7973#L18 assume 0 == ~n; 7975#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7957#ackermannENTRY ~m := #in~m;~n := #in~n; 7985#L15 assume !(0 == ~m); 7982#L18 assume !(0 == ~n); 7974#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7979#ackermannENTRY ~m := #in~m;~n := #in~n; 7980#L15 assume !(0 == ~m); 7973#L18 assume 0 == ~n; 7975#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7957#ackermannENTRY ~m := #in~m;~n := #in~n; 7986#L15 assume 0 == ~m;#res := 1 + ~n; 8119#ackermannFINAL assume true; 8118#ackermannEXIT >#42#return; 8117#L19-1 #res := #t~ret0;havoc #t~ret0; 8116#ackermannFINAL assume true; 8114#ackermannEXIT >#44#return; 8111#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8112#ackermannENTRY ~m := #in~m;~n := #in~n; 8115#L15 assume 0 == ~m;#res := 1 + ~n; 8113#ackermannFINAL assume true; 8110#ackermannEXIT >#46#return; 8108#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8107#ackermannFINAL assume true; 8074#ackermannEXIT >#42#return; 8072#L19-1 #res := #t~ret0;havoc #t~ret0; 8070#ackermannFINAL assume true; 8068#ackermannEXIT >#44#return; 8064#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8066#ackermannENTRY ~m := #in~m;~n := #in~n; 8099#L15 assume !(0 == ~m); 8094#L18 assume !(0 == ~n); 8009#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7939#ackermannENTRY ~m := #in~m;~n := #in~n; 8015#L15 assume !(0 == ~m); 8022#L18 assume !(0 == ~n); 7949#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8017#ackermannENTRY ~m := #in~m;~n := #in~n; 8013#L15 assume !(0 == ~m); 8014#L18 assume 0 == ~n; 7953#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7954#ackermannENTRY ~m := #in~m;~n := #in~n; 8109#L15 assume 0 == ~m;#res := 1 + ~n; 8003#ackermannFINAL assume true; 8105#ackermannEXIT >#42#return; 7962#L19-1 #res := #t~ret0;havoc #t~ret0; 7952#ackermannFINAL assume true; 7972#ackermannEXIT >#44#return; 7958#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 7950#ackermannENTRY ~m := #in~m;~n := #in~n; 7959#L15 assume 0 == ~m;#res := 1 + ~n; 7966#ackermannFINAL assume true; 8172#ackermannEXIT >#46#return; 8098#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8093#ackermannFINAL assume true; 8091#ackermannEXIT >#44#return; 8079#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8089#ackermannENTRY ~m := #in~m;~n := #in~n; 8124#L15 assume 0 == ~m;#res := 1 + ~n; 8120#ackermannFINAL assume true; 8078#ackermannEXIT >#46#return; 8073#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8071#ackermannFINAL assume true; 8063#ackermannEXIT >#46#return; 8061#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8060#ackermannFINAL assume true; 8049#ackermannEXIT >#42#return; 8046#L19-1 #res := #t~ret0;havoc #t~ret0; 8044#ackermannFINAL assume true; 8038#ackermannEXIT >#44#return; 8040#L21-1 [2019-11-20 02:12:58,837 INFO L796 eck$LassoCheckResult]: Loop: 8040#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8028#ackermannENTRY ~m := #in~m;~n := #in~n; 8166#L15 assume !(0 == ~m); 8165#L18 assume !(0 == ~n); 7970#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8005#ackermannENTRY ~m := #in~m;~n := #in~n; 7967#L15 assume !(0 == ~m); 7971#L18 assume !(0 == ~n); 7947#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8031#ackermannENTRY ~m := #in~m;~n := #in~n; 8032#L15 assume !(0 == ~m); 8055#L18 assume !(0 == ~n); 7948#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8031#ackermannENTRY ~m := #in~m;~n := #in~n; 8033#L15 assume !(0 == ~m); 8054#L18 assume 0 == ~n; 8000#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8004#ackermannENTRY ~m := #in~m;~n := #in~n; 8002#L15 assume !(0 == ~m); 7997#L18 assume !(0 == ~n); 7941#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7960#ackermannENTRY ~m := #in~m;~n := #in~n; 7961#L15 assume !(0 == ~m); 8030#L18 assume 0 == ~n; 7998#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8004#ackermannENTRY ~m := #in~m;~n := #in~n; 8002#L15 assume !(0 == ~m); 7997#L18 assume !(0 == ~n); 7941#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7960#ackermannENTRY ~m := #in~m;~n := #in~n; 7961#L15 assume !(0 == ~m); 8030#L18 assume 0 == ~n; 7998#L19 call #t~ret0 := ackermann(~m - 1, 1);< 8004#ackermannENTRY ~m := #in~m;~n := #in~n; 8002#L15 assume 0 == ~m;#res := 1 + ~n; 8003#ackermannFINAL assume true; 8105#ackermannEXIT >#42#return; 8104#L19-1 #res := #t~ret0;havoc #t~ret0; 8103#ackermannFINAL assume true; 8101#ackermannEXIT >#44#return; 8096#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8097#ackermannENTRY ~m := #in~m;~n := #in~n; 8102#L15 assume 0 == ~m;#res := 1 + ~n; 8100#ackermannFINAL assume true; 8095#ackermannEXIT >#46#return; 8092#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8090#ackermannFINAL assume true; 8075#ackermannEXIT >#42#return; 8072#L19-1 #res := #t~ret0;havoc #t~ret0; 8070#ackermannFINAL assume true; 8068#ackermannEXIT >#44#return; 8064#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8066#ackermannENTRY ~m := #in~m;~n := #in~n; 8099#L15 assume !(0 == ~m); 8094#L18 assume !(0 == ~n); 8009#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 7939#ackermannENTRY ~m := #in~m;~n := #in~n; 8015#L15 assume !(0 == ~m); 8022#L18 assume !(0 == ~n); 7949#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 8017#ackermannENTRY ~m := #in~m;~n := #in~n; 8013#L15 assume !(0 == ~m); 8014#L18 assume 0 == ~n; 7953#L19 call #t~ret0 := ackermann(~m - 1, 1);< 7954#ackermannENTRY ~m := #in~m;~n := #in~n; 8109#L15 assume 0 == ~m;#res := 1 + ~n; 8003#ackermannFINAL assume true; 8105#ackermannEXIT >#42#return; 7962#L19-1 #res := #t~ret0;havoc #t~ret0; 7952#ackermannFINAL assume true; 7972#ackermannEXIT >#44#return; 7958#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 7950#ackermannENTRY ~m := #in~m;~n := #in~n; 7959#L15 assume 0 == ~m;#res := 1 + ~n; 7966#ackermannFINAL assume true; 8172#ackermannEXIT >#46#return; 8098#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8093#ackermannFINAL assume true; 8091#ackermannEXIT >#44#return; 8079#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 8089#ackermannENTRY ~m := #in~m;~n := #in~n; 8124#L15 assume 0 == ~m;#res := 1 + ~n; 8120#ackermannFINAL assume true; 8078#ackermannEXIT >#46#return; 8073#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8071#ackermannFINAL assume true; 8063#ackermannEXIT >#46#return; 8061#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 8060#ackermannFINAL assume true; 8049#ackermannEXIT >#42#return; 8046#L19-1 #res := #t~ret0;havoc #t~ret0; 8044#ackermannFINAL assume true; 8038#ackermannEXIT >#44#return; 8040#L21-1 [2019-11-20 02:12:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:58,837 INFO L82 PathProgramCache]: Analyzing trace with hash 915423143, now seen corresponding path program 6 times [2019-11-20 02:12:58,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:58,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137734720] [2019-11-20 02:12:58,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 149 proven. 101 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-20 02:12:59,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137734720] [2019-11-20 02:12:59,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535970626] [2019-11-20 02:12:59,275 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:12:59,350 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-11-20 02:12:59,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:12:59,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 02:12:59,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 135 proven. 109 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2019-11-20 02:12:59,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:12:59,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2019-11-20 02:12:59,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583621536] [2019-11-20 02:12:59,413 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 02:12:59,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:12:59,413 INFO L82 PathProgramCache]: Analyzing trace with hash 514178910, now seen corresponding path program 4 times [2019-11-20 02:12:59,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:12:59,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956136171] [2019-11-20 02:12:59,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:12:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:12:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 163 proven. 101 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2019-11-20 02:12:59,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956136171] [2019-11-20 02:12:59,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294145220] [2019-11-20 02:12:59,730 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:12:59,791 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 02:12:59,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:12:59,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 02:12:59,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:12:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 149 proven. 109 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-20 02:12:59,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:12:59,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2019-11-20 02:12:59,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652073661] [2019-11-20 02:12:59,831 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 02:12:59,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:12:59,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 02:12:59,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-11-20 02:12:59,832 INFO L87 Difference]: Start difference. First operand 240 states and 311 transitions. cyclomatic complexity: 75 Second operand 18 states. [2019-11-20 02:13:00,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:13:00,607 INFO L93 Difference]: Finished difference Result 349 states and 486 transitions. [2019-11-20 02:13:00,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-20 02:13:00,618 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 349 states and 486 transitions. [2019-11-20 02:13:00,625 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 56 [2019-11-20 02:13:00,630 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 349 states to 265 states and 362 transitions. [2019-11-20 02:13:00,630 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 223 [2019-11-20 02:13:00,631 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 223 [2019-11-20 02:13:00,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 265 states and 362 transitions. [2019-11-20 02:13:00,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:13:00,632 INFO L688 BuchiCegarLoop]: Abstraction has 265 states and 362 transitions. [2019-11-20 02:13:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states and 362 transitions. [2019-11-20 02:13:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 221. [2019-11-20 02:13:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-20 02:13:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 281 transitions. [2019-11-20 02:13:00,643 INFO L711 BuchiCegarLoop]: Abstraction has 221 states and 281 transitions. [2019-11-20 02:13:00,643 INFO L591 BuchiCegarLoop]: Abstraction has 221 states and 281 transitions. [2019-11-20 02:13:00,643 INFO L424 BuchiCegarLoop]: ======== Iteration 13============ [2019-11-20 02:13:00,643 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 221 states and 281 transitions. [2019-11-20 02:13:00,645 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 48 [2019-11-20 02:13:00,645 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:13:00,645 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:13:00,648 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [17, 15, 11, 7, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1] [2019-11-20 02:13:00,648 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [61, 58, 37, 26, 26, 24, 24, 24, 23, 23, 11, 11, 11, 11] [2019-11-20 02:13:00,649 INFO L794 eck$LassoCheckResult]: Stem: 9824#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 9783#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 9784#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 9792#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 9793#ackermannENTRY ~m := #in~m;~n := #in~n; 9852#L15 assume !(0 == ~m); 9854#L18 assume !(0 == ~n); 9802#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9849#ackermannENTRY ~m := #in~m;~n := #in~n; 9851#L15 assume !(0 == ~m); 9853#L18 assume !(0 == ~n); 9801#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9849#ackermannENTRY ~m := #in~m;~n := #in~n; 9850#L15 assume !(0 == ~m); 9846#L18 assume 0 == ~n; 9841#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9844#ackermannENTRY ~m := #in~m;~n := #in~n; 9843#L15 assume !(0 == ~m); 9840#L18 assume !(0 == ~n); 9832#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9837#ackermannENTRY ~m := #in~m;~n := #in~n; 9838#L15 assume !(0 == ~m); 9831#L18 assume 0 == ~n; 9833#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9808#ackermannENTRY ~m := #in~m;~n := #in~n; 9843#L15 assume !(0 == ~m); 9840#L18 assume !(0 == ~n); 9832#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9837#ackermannENTRY ~m := #in~m;~n := #in~n; 9838#L15 assume !(0 == ~m); 9831#L18 assume 0 == ~n; 9833#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9808#ackermannENTRY ~m := #in~m;~n := #in~n; 9845#L15 assume 0 == ~m;#res := 1 + ~n; 9974#ackermannFINAL assume true; 9890#ackermannEXIT >#42#return; 9891#L19-1 #res := #t~ret0;havoc #t~ret0; 9966#ackermannFINAL assume true; 9964#ackermannEXIT >#44#return; 9961#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9962#ackermannENTRY ~m := #in~m;~n := #in~n; 9965#L15 assume 0 == ~m;#res := 1 + ~n; 9963#ackermannFINAL assume true; 9960#ackermannEXIT >#46#return; 9959#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9958#ackermannFINAL assume true; 9957#ackermannEXIT >#42#return; 9896#L19-1 #res := #t~ret0;havoc #t~ret0; 9956#ackermannFINAL assume true; 9955#ackermannEXIT >#44#return; 9904#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9906#ackermannENTRY ~m := #in~m;~n := #in~n; 9954#L15 assume !(0 == ~m); 9952#L18 assume !(0 == ~n); 9816#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9788#ackermannENTRY ~m := #in~m;~n := #in~n; 9881#L15 assume !(0 == ~m); 9815#L18 assume !(0 == ~n); 9798#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9826#L15 assume !(0 == ~m); 9827#L18 assume !(0 == ~n); 9795#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9870#L15 assume !(0 == ~m); 9869#L18 assume 0 == ~n; 9804#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9805#ackermannENTRY ~m := #in~m;~n := #in~n; 9899#L15 assume 0 == ~m;#res := 1 + ~n; 9867#ackermannFINAL assume true; 9887#ackermannEXIT >#42#return; 9888#L19-1 #res := #t~ret0;havoc #t~ret0; 10000#ackermannFINAL assume true; 9999#ackermannEXIT >#44#return; 9794#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9990#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10001#ackermannFINAL assume true; 9991#ackermannEXIT >#44#return; 9809#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9986#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9979#ackermannFINAL assume true; 9945#ackermannEXIT >#44#return; 9922#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9941#ackermannENTRY ~m := #in~m;~n := #in~n; 9970#L15 assume 0 == ~m;#res := 1 + ~n; 9969#ackermannFINAL assume true; 9921#ackermannEXIT >#46#return; 9927#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9950#ackermannFINAL assume true; 9903#ackermannEXIT >#46#return; 9900#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9898#ackermannFINAL assume true; 9892#ackermannEXIT >#42#return; 9893#L19-1 #res := #t~ret0;havoc #t~ret0; 9997#ackermannFINAL assume true; 9996#ackermannEXIT >#44#return; 9873#L21-1 [2019-11-20 02:13:00,649 INFO L796 eck$LassoCheckResult]: Loop: 9873#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9882#ackermannENTRY ~m := #in~m;~n := #in~n; 9880#L15 assume !(0 == ~m); 9879#L18 assume !(0 == ~n); 9822#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9871#ackermannENTRY ~m := #in~m;~n := #in~n; 9872#L15 assume !(0 == ~m); 9878#L18 assume !(0 == ~n); 9796#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9811#ackermannENTRY ~m := #in~m;~n := #in~n; 9812#L15 assume !(0 == ~m); 9877#L18 assume !(0 == ~n); 9797#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9811#ackermannENTRY ~m := #in~m;~n := #in~n; 9812#L15 assume !(0 == ~m); 9877#L18 assume !(0 == ~n); 9797#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9811#ackermannENTRY ~m := #in~m;~n := #in~n; 9813#L15 assume !(0 == ~m); 9949#L18 assume 0 == ~n; 9865#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9868#ackermannENTRY ~m := #in~m;~n := #in~n; 9866#L15 assume !(0 == ~m); 9862#L18 assume !(0 == ~n); 9790#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9913#ackermannENTRY ~m := #in~m;~n := #in~n; 9919#L15 assume !(0 == ~m); 9917#L18 assume 0 == ~n; 9864#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9868#ackermannENTRY ~m := #in~m;~n := #in~n; 9866#L15 assume !(0 == ~m); 9862#L18 assume !(0 == ~n); 9790#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9913#ackermannENTRY ~m := #in~m;~n := #in~n; 9919#L15 assume !(0 == ~m); 9917#L18 assume 0 == ~n; 9864#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9868#ackermannENTRY ~m := #in~m;~n := #in~n; 9866#L15 assume 0 == ~m;#res := 1 + ~n; 9867#ackermannFINAL assume true; 9887#ackermannEXIT >#42#return; 9889#L19-1 #res := #t~ret0;havoc #t~ret0; 9914#ackermannFINAL assume true; 9912#ackermannEXIT >#44#return; 9910#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9911#ackermannENTRY ~m := #in~m;~n := #in~n; 9916#L15 assume 0 == ~m;#res := 1 + ~n; 9915#ackermannFINAL assume true; 9909#ackermannEXIT >#46#return; 9908#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9907#ackermannFINAL assume true; 9895#ackermannEXIT >#42#return; 9896#L19-1 #res := #t~ret0;havoc #t~ret0; 9956#ackermannFINAL assume true; 9955#ackermannEXIT >#44#return; 9904#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9906#ackermannENTRY ~m := #in~m;~n := #in~n; 9954#L15 assume !(0 == ~m); 9952#L18 assume !(0 == ~n); 9816#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9788#ackermannENTRY ~m := #in~m;~n := #in~n; 9881#L15 assume !(0 == ~m); 9815#L18 assume !(0 == ~n); 9798#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9826#L15 assume !(0 == ~m); 9827#L18 assume !(0 == ~n); 9795#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9870#L15 assume !(0 == ~m); 9869#L18 assume 0 == ~n; 9804#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9805#ackermannENTRY ~m := #in~m;~n := #in~n; 9899#L15 assume 0 == ~m;#res := 1 + ~n; 9867#ackermannFINAL assume true; 9887#ackermannEXIT >#42#return; 9888#L19-1 #res := #t~ret0;havoc #t~ret0; 10000#ackermannFINAL assume true; 9999#ackermannEXIT >#44#return; 9794#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9990#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10001#ackermannFINAL assume true; 9991#ackermannEXIT >#44#return; 9809#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9986#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9979#ackermannFINAL assume true; 9945#ackermannEXIT >#44#return; 9922#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9941#ackermannENTRY ~m := #in~m;~n := #in~n; 9970#L15 assume 0 == ~m;#res := 1 + ~n; 9969#ackermannFINAL assume true; 9921#ackermannEXIT >#46#return; 9927#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9950#ackermannFINAL assume true; 9903#ackermannEXIT >#46#return; 9900#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9898#ackermannFINAL assume true; 9892#ackermannEXIT >#42#return; 9893#L19-1 #res := #t~ret0;havoc #t~ret0; 9997#ackermannFINAL assume true; 9996#ackermannEXIT >#44#return; 9873#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9882#ackermannENTRY ~m := #in~m;~n := #in~n; 9880#L15 assume !(0 == ~m); 9879#L18 assume !(0 == ~n); 9822#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9871#ackermannENTRY ~m := #in~m;~n := #in~n; 9872#L15 assume !(0 == ~m); 9878#L18 assume !(0 == ~n); 9796#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9811#ackermannENTRY ~m := #in~m;~n := #in~n; 9812#L15 assume !(0 == ~m); 9877#L18 assume !(0 == ~n); 9797#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9811#ackermannENTRY ~m := #in~m;~n := #in~n; 9813#L15 assume !(0 == ~m); 9949#L18 assume 0 == ~n; 9865#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9868#ackermannENTRY ~m := #in~m;~n := #in~n; 9866#L15 assume !(0 == ~m); 9862#L18 assume !(0 == ~n); 9790#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9913#ackermannENTRY ~m := #in~m;~n := #in~n; 9919#L15 assume !(0 == ~m); 9917#L18 assume 0 == ~n; 9864#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9868#ackermannENTRY ~m := #in~m;~n := #in~n; 9866#L15 assume !(0 == ~m); 9862#L18 assume !(0 == ~n); 9790#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9913#ackermannENTRY ~m := #in~m;~n := #in~n; 9919#L15 assume !(0 == ~m); 9917#L18 assume 0 == ~n; 9864#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9868#ackermannENTRY ~m := #in~m;~n := #in~n; 9866#L15 assume 0 == ~m;#res := 1 + ~n; 9867#ackermannFINAL assume true; 9887#ackermannEXIT >#42#return; 9889#L19-1 #res := #t~ret0;havoc #t~ret0; 9914#ackermannFINAL assume true; 9912#ackermannEXIT >#44#return; 9910#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9911#ackermannENTRY ~m := #in~m;~n := #in~n; 9916#L15 assume 0 == ~m;#res := 1 + ~n; 9915#ackermannFINAL assume true; 9909#ackermannEXIT >#46#return; 9908#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9907#ackermannFINAL assume true; 9895#ackermannEXIT >#42#return; 9896#L19-1 #res := #t~ret0;havoc #t~ret0; 9956#ackermannFINAL assume true; 9955#ackermannEXIT >#44#return; 9904#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9906#ackermannENTRY ~m := #in~m;~n := #in~n; 9954#L15 assume !(0 == ~m); 9952#L18 assume !(0 == ~n); 9816#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9788#ackermannENTRY ~m := #in~m;~n := #in~n; 9881#L15 assume !(0 == ~m); 9815#L18 assume !(0 == ~n); 9798#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9826#L15 assume !(0 == ~m); 9827#L18 assume !(0 == ~n); 9795#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9870#L15 assume !(0 == ~m); 9869#L18 assume 0 == ~n; 9804#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9805#ackermannENTRY ~m := #in~m;~n := #in~n; 9899#L15 assume 0 == ~m;#res := 1 + ~n; 9867#ackermannFINAL assume true; 9887#ackermannEXIT >#42#return; 9888#L19-1 #res := #t~ret0;havoc #t~ret0; 10000#ackermannFINAL assume true; 9999#ackermannEXIT >#44#return; 9794#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9990#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10001#ackermannFINAL assume true; 9991#ackermannEXIT >#44#return; 9809#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9986#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9979#ackermannFINAL assume true; 9945#ackermannEXIT >#44#return; 9922#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9941#ackermannENTRY ~m := #in~m;~n := #in~n; 9970#L15 assume 0 == ~m;#res := 1 + ~n; 9969#ackermannFINAL assume true; 9921#ackermannEXIT >#46#return; 9927#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9950#ackermannFINAL assume true; 9903#ackermannEXIT >#46#return; 9900#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9898#ackermannFINAL assume true; 9892#ackermannEXIT >#42#return; 9893#L19-1 #res := #t~ret0;havoc #t~ret0; 9997#ackermannFINAL assume true; 9996#ackermannEXIT >#44#return; 9873#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9882#ackermannENTRY ~m := #in~m;~n := #in~n; 9880#L15 assume !(0 == ~m); 9879#L18 assume !(0 == ~n); 9822#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9871#ackermannENTRY ~m := #in~m;~n := #in~n; 9872#L15 assume !(0 == ~m); 9878#L18 assume !(0 == ~n); 9796#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9811#ackermannENTRY ~m := #in~m;~n := #in~n; 9812#L15 assume !(0 == ~m); 9877#L18 assume !(0 == ~n); 9797#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9811#ackermannENTRY ~m := #in~m;~n := #in~n; 9813#L15 assume !(0 == ~m); 9949#L18 assume 0 == ~n; 9865#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9868#ackermannENTRY ~m := #in~m;~n := #in~n; 9866#L15 assume 0 == ~m;#res := 1 + ~n; 9867#ackermannFINAL assume true; 9887#ackermannEXIT >#42#return; 9888#L19-1 #res := #t~ret0;havoc #t~ret0; 10000#ackermannFINAL assume true; 9999#ackermannEXIT >#44#return; 9794#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9990#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10001#ackermannFINAL assume true; 9991#ackermannEXIT >#44#return; 9809#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9986#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9979#ackermannFINAL assume true; 9945#ackermannEXIT >#44#return; 9924#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9941#ackermannENTRY ~m := #in~m;~n := #in~n; 9970#L15 assume 0 == ~m;#res := 1 + ~n; 9969#ackermannFINAL assume true; 9921#ackermannEXIT >#46#return; 9929#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9981#ackermannFINAL assume true; 9980#ackermannEXIT >#46#return; 9800#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9803#ackermannFINAL assume true; 9828#ackermannEXIT >#44#return; 9787#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9884#ackermannENTRY ~m := #in~m;~n := #in~n; 9883#L15 assume !(0 == ~m); 9814#L18 assume !(0 == ~n); 9785#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9788#ackermannENTRY ~m := #in~m;~n := #in~n; 9881#L15 assume !(0 == ~m); 9815#L18 assume !(0 == ~n); 9798#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9826#L15 assume !(0 == ~m); 9827#L18 assume !(0 == ~n); 9795#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9870#L15 assume !(0 == ~m); 9869#L18 assume 0 == ~n; 9804#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9805#ackermannENTRY ~m := #in~m;~n := #in~n; 9899#L15 assume 0 == ~m;#res := 1 + ~n; 9867#ackermannFINAL assume true; 9887#ackermannEXIT >#42#return; 9888#L19-1 #res := #t~ret0;havoc #t~ret0; 10000#ackermannFINAL assume true; 9999#ackermannEXIT >#44#return; 9794#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9990#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10001#ackermannFINAL assume true; 9991#ackermannEXIT >#44#return; 9809#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9986#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9979#ackermannFINAL assume true; 9945#ackermannEXIT >#44#return; 9924#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9941#ackermannENTRY ~m := #in~m;~n := #in~n; 9970#L15 assume 0 == ~m;#res := 1 + ~n; 9969#ackermannFINAL assume true; 9921#ackermannEXIT >#46#return; 9929#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9981#ackermannFINAL assume true; 9980#ackermannEXIT >#46#return; 9978#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9977#ackermannFINAL assume true; 9946#ackermannEXIT >#44#return; 9939#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9943#ackermannENTRY ~m := #in~m;~n := #in~n; 9976#L15 assume !(0 == ~m); 9975#L18 assume !(0 == ~n); 9817#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9788#ackermannENTRY ~m := #in~m;~n := #in~n; 9881#L15 assume !(0 == ~m); 9815#L18 assume !(0 == ~n); 9798#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9826#L15 assume !(0 == ~m); 9827#L18 assume !(0 == ~n); 9795#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 9861#ackermannENTRY ~m := #in~m;~n := #in~n; 9870#L15 assume !(0 == ~m); 9869#L18 assume 0 == ~n; 9804#L19 call #t~ret0 := ackermann(~m - 1, 1);< 9805#ackermannENTRY ~m := #in~m;~n := #in~n; 9899#L15 assume 0 == ~m;#res := 1 + ~n; 9867#ackermannFINAL assume true; 9887#ackermannEXIT >#42#return; 9888#L19-1 #res := #t~ret0;havoc #t~ret0; 10000#ackermannFINAL assume true; 9999#ackermannEXIT >#44#return; 9794#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9990#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 10001#ackermannFINAL assume true; 9991#ackermannEXIT >#44#return; 9809#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9799#ackermannENTRY ~m := #in~m;~n := #in~n; 9810#L15 assume 0 == ~m;#res := 1 + ~n; 9825#ackermannFINAL assume true; 9989#ackermannEXIT >#46#return; 9986#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9979#ackermannFINAL assume true; 9945#ackermannEXIT >#44#return; 9925#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 9941#ackermannENTRY ~m := #in~m;~n := #in~n; 9970#L15 assume 0 == ~m;#res := 1 + ~n; 9969#ackermannFINAL assume true; 9921#ackermannEXIT >#46#return; 9930#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9967#ackermannFINAL assume true; 9937#ackermannEXIT >#46#return; 9936#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9995#ackermannFINAL assume true; 9992#ackermannEXIT >#46#return; 9993#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 9998#ackermannFINAL assume true; 9987#ackermannEXIT >#44#return; 9873#L21-1 [2019-11-20 02:13:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:00,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1247057107, now seen corresponding path program 7 times [2019-11-20 02:13:00,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:13:00,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358732618] [2019-11-20 02:13:00,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:13:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:13:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:13:00,681 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:13:00,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:00,682 INFO L82 PathProgramCache]: Analyzing trace with hash 982423659, now seen corresponding path program 5 times [2019-11-20 02:13:00,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:13:00,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253513689] [2019-11-20 02:13:00,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:13:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8596 backedges. 1948 proven. 3725 refuted. 0 times theorem prover too weak. 2923 trivial. 0 not checked. [2019-11-20 02:13:03,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253513689] [2019-11-20 02:13:03,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420394306] [2019-11-20 02:13:03,827 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:13:03,941 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-20 02:13:03,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:13:03,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-20 02:13:03,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8596 backedges. 817 proven. 1614 refuted. 0 times theorem prover too weak. 6165 trivial. 0 not checked. [2019-11-20 02:13:04,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:13:04,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 21] total 56 [2019-11-20 02:13:04,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177948260] [2019-11-20 02:13:04,272 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-20 02:13:04,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:13:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-20 02:13:04,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2880, Unknown=0, NotChecked=0, Total=3080 [2019-11-20 02:13:04,275 INFO L87 Difference]: Start difference. First operand 221 states and 281 transitions. cyclomatic complexity: 64 Second operand 56 states. [2019-11-20 02:13:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:13:11,127 INFO L93 Difference]: Finished difference Result 391 states and 563 transitions. [2019-11-20 02:13:11,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-11-20 02:13:11,128 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 391 states and 563 transitions. [2019-11-20 02:13:11,135 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 61 [2019-11-20 02:13:11,141 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 391 states to 351 states and 506 transitions. [2019-11-20 02:13:11,141 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 309 [2019-11-20 02:13:11,142 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 309 [2019-11-20 02:13:11,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 351 states and 506 transitions. [2019-11-20 02:13:11,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:13:11,142 INFO L688 BuchiCegarLoop]: Abstraction has 351 states and 506 transitions. [2019-11-20 02:13:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states and 506 transitions. [2019-11-20 02:13:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 236. [2019-11-20 02:13:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-11-20 02:13:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 306 transitions. [2019-11-20 02:13:11,154 INFO L711 BuchiCegarLoop]: Abstraction has 236 states and 306 transitions. [2019-11-20 02:13:11,154 INFO L591 BuchiCegarLoop]: Abstraction has 236 states and 306 transitions. [2019-11-20 02:13:11,154 INFO L424 BuchiCegarLoop]: ======== Iteration 14============ [2019-11-20 02:13:11,155 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 236 states and 306 transitions. [2019-11-20 02:13:11,157 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 49 [2019-11-20 02:13:11,157 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:13:11,157 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:13:11,158 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [17, 15, 11, 7, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1] [2019-11-20 02:13:11,159 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [18, 15, 12, 8, 8, 6, 6, 6, 5, 5, 4, 4, 4, 4] [2019-11-20 02:13:11,159 INFO L794 eck$LassoCheckResult]: Stem: 13899#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 13858#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 13859#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 13868#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 13869#ackermannENTRY ~m := #in~m;~n := #in~n; 13926#L15 assume !(0 == ~m); 13928#L18 assume !(0 == ~n); 13920#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13923#ackermannENTRY ~m := #in~m;~n := #in~n; 13925#L15 assume !(0 == ~m); 13927#L18 assume !(0 == ~n); 13919#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13923#ackermannENTRY ~m := #in~m;~n := #in~n; 13924#L15 assume !(0 == ~m); 13918#L18 assume 0 == ~n; 13913#L19 call #t~ret0 := ackermann(~m - 1, 1);< 13916#ackermannENTRY ~m := #in~m;~n := #in~n; 13915#L15 assume !(0 == ~m); 13912#L18 assume !(0 == ~n); 13906#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13910#ackermannENTRY ~m := #in~m;~n := #in~n; 13908#L15 assume !(0 == ~m); 13905#L18 assume 0 == ~n; 13907#L19 call #t~ret0 := ackermann(~m - 1, 1);< 13885#ackermannENTRY ~m := #in~m;~n := #in~n; 13915#L15 assume !(0 == ~m); 13912#L18 assume !(0 == ~n); 13906#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13910#ackermannENTRY ~m := #in~m;~n := #in~n; 13908#L15 assume !(0 == ~m); 13905#L18 assume 0 == ~n; 13907#L19 call #t~ret0 := ackermann(~m - 1, 1);< 13885#ackermannENTRY ~m := #in~m;~n := #in~n; 13917#L15 assume 0 == ~m;#res := 1 + ~n; 14002#ackermannFINAL assume true; 14001#ackermannEXIT >#42#return; 14000#L19-1 #res := #t~ret0;havoc #t~ret0; 13999#ackermannFINAL assume true; 13997#ackermannEXIT >#44#return; 13994#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 13995#ackermannENTRY ~m := #in~m;~n := #in~n; 13998#L15 assume 0 == ~m;#res := 1 + ~n; 13996#ackermannFINAL assume true; 13993#ackermannEXIT >#46#return; 13992#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 13991#ackermannFINAL assume true; 13971#ackermannEXIT >#42#return; 13970#L19-1 #res := #t~ret0;havoc #t~ret0; 13969#ackermannFINAL assume true; 13967#ackermannEXIT >#44#return; 13968#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 14059#ackermannENTRY ~m := #in~m;~n := #in~n; 14058#L15 assume !(0 == ~m); 14056#L18 assume !(0 == ~n); 13896#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13864#ackermannENTRY ~m := #in~m;~n := #in~n; 13958#L15 assume !(0 == ~m); 13894#L18 assume !(0 == ~n); 13873#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13937#ackermannENTRY ~m := #in~m;~n := #in~n; 13901#L15 assume !(0 == ~m); 13902#L18 assume !(0 == ~n); 13871#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13937#ackermannENTRY ~m := #in~m;~n := #in~n; 13946#L15 assume !(0 == ~m); 13945#L18 assume 0 == ~n; 13881#L19 call #t~ret0 := ackermann(~m - 1, 1);< 13882#ackermannENTRY ~m := #in~m;~n := #in~n; 13990#L15 assume 0 == ~m;#res := 1 + ~n; 13943#ackermannFINAL assume true; 13988#ackermannEXIT >#42#return; 13989#L19-1 #res := #t~ret0;havoc #t~ret0; 14063#ackermannFINAL assume true; 14062#ackermannEXIT >#44#return; 13886#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 13875#ackermannENTRY ~m := #in~m;~n := #in~n; 13889#L15 assume 0 == ~m;#res := 1 + ~n; 13900#ackermannFINAL assume true; 14039#ackermannEXIT >#46#return; 14040#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 14061#ackermannFINAL assume true; 14060#ackermannEXIT >#44#return; 13888#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 13875#ackermannENTRY ~m := #in~m;~n := #in~n; 13889#L15 assume 0 == ~m;#res := 1 + ~n; 13900#ackermannFINAL assume true; 14039#ackermannEXIT >#46#return; 14042#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 14054#ackermannFINAL assume true; 14053#ackermannEXIT >#44#return; 14023#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 14028#ackermannENTRY ~m := #in~m;~n := #in~n; 14031#L15 assume 0 == ~m;#res := 1 + ~n; 14029#ackermannFINAL assume true; 14018#ackermannEXIT >#46#return; 14027#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 14092#ackermannFINAL assume true; 14091#ackermannEXIT >#46#return; 14087#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 14086#ackermannFINAL assume true; 14083#ackermannEXIT >#42#return; 14084#L19-1 #res := #t~ret0;havoc #t~ret0; 14064#ackermannFINAL assume true; 14052#ackermannEXIT >#44#return; 14011#L21-1 [2019-11-20 02:13:11,159 INFO L796 eck$LassoCheckResult]: Loop: 14011#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 14015#ackermannENTRY ~m := #in~m;~n := #in~n; 14034#L15 assume !(0 == ~m); 14032#L18 assume !(0 == ~n); 13877#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13947#ackermannENTRY ~m := #in~m;~n := #in~n; 13948#L15 assume !(0 == ~m); 13950#L18 assume !(0 == ~n); 13872#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13890#ackermannENTRY ~m := #in~m;~n := #in~n; 13891#L15 assume !(0 == ~m); 13951#L18 assume !(0 == ~n); 13874#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13890#ackermannENTRY ~m := #in~m;~n := #in~n; 13892#L15 assume !(0 == ~m); 13979#L18 assume 0 == ~n; 13941#L19 call #t~ret0 := ackermann(~m - 1, 1);< 13944#ackermannENTRY ~m := #in~m;~n := #in~n; 13942#L15 assume !(0 == ~m); 13938#L18 assume !(0 == ~n); 13866#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13935#ackermannENTRY ~m := #in~m;~n := #in~n; 13936#L15 assume !(0 == ~m); 13978#L18 assume 0 == ~n; 13940#L19 call #t~ret0 := ackermann(~m - 1, 1);< 13944#ackermannENTRY ~m := #in~m;~n := #in~n; 13942#L15 assume !(0 == ~m); 13938#L18 assume !(0 == ~n); 13866#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13935#ackermannENTRY ~m := #in~m;~n := #in~n; 13936#L15 assume !(0 == ~m); 13978#L18 assume 0 == ~n; 13940#L19 call #t~ret0 := ackermann(~m - 1, 1);< 13944#ackermannENTRY ~m := #in~m;~n := #in~n; 13942#L15 assume 0 == ~m;#res := 1 + ~n; 13943#ackermannFINAL assume true; 13988#ackermannEXIT >#42#return; 13987#L19-1 #res := #t~ret0;havoc #t~ret0; 13986#ackermannFINAL assume true; 13985#ackermannEXIT >#44#return; 13981#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 13982#ackermannENTRY ~m := #in~m;~n := #in~n; 13984#L15 assume 0 == ~m;#res := 1 + ~n; 13983#ackermannFINAL assume true; 13980#ackermannEXIT >#46#return; 13977#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 13974#ackermannFINAL assume true; 13972#ackermannEXIT >#42#return; 13970#L19-1 #res := #t~ret0;havoc #t~ret0; 13969#ackermannFINAL assume true; 13967#ackermannEXIT >#44#return; 13968#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 14059#ackermannENTRY ~m := #in~m;~n := #in~n; 14058#L15 assume !(0 == ~m); 14056#L18 assume !(0 == ~n); 13896#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13864#ackermannENTRY ~m := #in~m;~n := #in~n; 13958#L15 assume !(0 == ~m); 13894#L18 assume !(0 == ~n); 13873#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13937#ackermannENTRY ~m := #in~m;~n := #in~n; 13901#L15 assume !(0 == ~m); 13902#L18 assume !(0 == ~n); 13871#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 13937#ackermannENTRY ~m := #in~m;~n := #in~n; 13946#L15 assume !(0 == ~m); 13945#L18 assume 0 == ~n; 13881#L19 call #t~ret0 := ackermann(~m - 1, 1);< 13882#ackermannENTRY ~m := #in~m;~n := #in~n; 13990#L15 assume 0 == ~m;#res := 1 + ~n; 13943#ackermannFINAL assume true; 13988#ackermannEXIT >#42#return; 13989#L19-1 #res := #t~ret0;havoc #t~ret0; 14063#ackermannFINAL assume true; 14062#ackermannEXIT >#44#return; 13886#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 13875#ackermannENTRY ~m := #in~m;~n := #in~n; 13889#L15 assume 0 == ~m;#res := 1 + ~n; 13900#ackermannFINAL assume true; 14039#ackermannEXIT >#46#return; 14040#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 14061#ackermannFINAL assume true; 14060#ackermannEXIT >#44#return; 13888#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 13875#ackermannENTRY ~m := #in~m;~n := #in~n; 13889#L15 assume 0 == ~m;#res := 1 + ~n; 13900#ackermannFINAL assume true; 14039#ackermannEXIT >#46#return; 14042#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 14054#ackermannFINAL assume true; 14053#ackermannEXIT >#44#return; 14023#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 14028#ackermannENTRY ~m := #in~m;~n := #in~n; 14031#L15 assume 0 == ~m;#res := 1 + ~n; 14029#ackermannFINAL assume true; 14018#ackermannEXIT >#46#return; 14027#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 14092#ackermannFINAL assume true; 14091#ackermannEXIT >#46#return; 14087#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 14086#ackermannFINAL assume true; 14083#ackermannEXIT >#42#return; 14084#L19-1 #res := #t~ret0;havoc #t~ret0; 14064#ackermannFINAL assume true; 14052#ackermannEXIT >#44#return; 14011#L21-1 [2019-11-20 02:13:11,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:11,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1247057107, now seen corresponding path program 8 times [2019-11-20 02:13:11,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:13:11,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133643803] [2019-11-20 02:13:11,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:13:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:13:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:13:11,189 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:13:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:11,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1507585948, now seen corresponding path program 6 times [2019-11-20 02:13:11,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:13:11,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350064019] [2019-11-20 02:13:11,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:13:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:13:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:13:11,222 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:13:11,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:11,223 INFO L82 PathProgramCache]: Analyzing trace with hash 647333560, now seen corresponding path program 9 times [2019-11-20 02:13:11,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:13:11,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069582398] [2019-11-20 02:13:11,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:13:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2574 backedges. 563 proven. 1015 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2019-11-20 02:13:12,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069582398] [2019-11-20 02:13:12,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315112726] [2019-11-20 02:13:12,579 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:13:12,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-20 02:13:12,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:13:12,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 02:13:12,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2574 backedges. 540 proven. 366 refuted. 0 times theorem prover too weak. 1668 trivial. 0 not checked. [2019-11-20 02:13:13,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:13:13,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11] total 45 [2019-11-20 02:13:13,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080121100] [2019-11-20 02:13:14,366 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:13:14,366 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:13:14,366 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:13:14,366 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:13:14,366 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:13:14,366 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:14,366 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:13:14,366 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:13:14,367 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration14_Loop [2019-11-20 02:13:14,367 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:13:14,367 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:13:14,367 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 02:13:14,370 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 02:13:14,378 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 02:13:14,379 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 02:13:14,383 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 02:13:14,477 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:13:14,477 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 180 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:13:14,486 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:13:14,487 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 180 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:14,491 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:13:14,491 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#res=0} Honda state: {ackermann_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 181 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:13:14,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:13:14,500 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 181 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 182 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 02:13:14,517 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:13:14,517 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 182 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:17,001 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:13:17,003 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:13:17,003 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:13:17,003 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:13:17,003 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:13:17,004 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:13:17,004 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:17,004 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:13:17,004 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:13:17,004 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration14_Loop [2019-11-20 02:13:17,004 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:13:17,004 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:13:17,005 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 02:13:17,006 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 02:13:17,008 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 02:13:17,010 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 02:13:17,019 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 02:13:17,072 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:13:17,072 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 183 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 183 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:17,076 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 02:13:17,077 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:13:17,077 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:13:17,078 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:13:17,078 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:13:17,078 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:13:17,078 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:13:17,078 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:13:17,079 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 184 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 184 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:17,084 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 02:13:17,085 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:13:17,085 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:13:17,085 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:13:17,085 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:13:17,085 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:13:17,085 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:13:17,086 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:13:17,087 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 185 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 185 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:17,091 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 02:13:17,092 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:13:17,092 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:13:17,092 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:13:17,093 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:13:17,093 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:13:17,093 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:13:17,093 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:13:17,094 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 186 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 186 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:17,099 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 02:13:17,100 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:13:17,100 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:13:17,100 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:13:17,100 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:13:17,100 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:13:17,101 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:13:17,102 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:13:17,104 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:13:17,106 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 02:13:17,106 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 187 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 187 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:17,109 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:13:17,110 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:13:17,110 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:13:17,110 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_#t~ret1) = -1*ackermann_#t~ret1 + 4 Supporting invariants [] [2019-11-20 02:13:17,111 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:13:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:17,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 02:13:17,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:17,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,254 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:17,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-20 02:13:17,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:17,770 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 199 proven. 210 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2019-11-20 02:13:17,770 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 24 loop predicates [2019-11-20 02:13:17,771 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 236 states and 306 transitions. cyclomatic complexity: 74 Second operand 26 states. [2019-11-20 02:13:17,988 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 236 states and 306 transitions. cyclomatic complexity: 74. Second operand 26 states. Result 241 states and 311 transitions. Complement of second has 13 states. [2019-11-20 02:13:17,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 02:13:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 02:13:17,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 20 transitions. [2019-11-20 02:13:17,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 104 letters. Loop has 105 letters. [2019-11-20 02:13:17,996 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:17,996 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:13:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:18,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 02:13:18,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:18,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:18,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-20 02:13:18,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 199 proven. 210 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2019-11-20 02:13:18,954 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 24 loop predicates [2019-11-20 02:13:18,954 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 236 states and 306 transitions. cyclomatic complexity: 74 Second operand 26 states. [2019-11-20 02:13:19,163 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 236 states and 306 transitions. cyclomatic complexity: 74. Second operand 26 states. Result 241 states and 311 transitions. Complement of second has 13 states. [2019-11-20 02:13:19,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-20 02:13:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 02:13:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 20 transitions. [2019-11-20 02:13:19,169 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 20 transitions. Stem has 104 letters. Loop has 105 letters. [2019-11-20 02:13:19,169 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:19,170 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:13:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:19,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 02:13:19,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:19,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:19,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-20 02:13:19,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 199 proven. 210 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2019-11-20 02:13:19,948 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 24 loop predicates [2019-11-20 02:13:19,948 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 236 states and 306 transitions. cyclomatic complexity: 74 Second operand 26 states. [2019-11-20 02:13:23,775 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 236 states and 306 transitions. cyclomatic complexity: 74. Second operand 26 states. Result 1571 states and 1949 transitions. Complement of second has 538 states. [2019-11-20 02:13:23,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 61 states 2 stem states 58 non-accepting loop states 1 accepting loop states [2019-11-20 02:13:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 02:13:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 135 transitions. [2019-11-20 02:13:23,783 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 61 states and 135 transitions. Stem has 104 letters. Loop has 105 letters. [2019-11-20 02:13:23,785 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:23,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 61 states and 135 transitions. Stem has 209 letters. Loop has 105 letters. [2019-11-20 02:13:23,789 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:23,790 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 61 states and 135 transitions. Stem has 104 letters. Loop has 210 letters. [2019-11-20 02:13:23,795 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:23,796 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1571 states and 1949 transitions. [2019-11-20 02:13:23,819 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 187 [2019-11-20 02:13:23,831 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1571 states to 779 states and 1012 transitions. [2019-11-20 02:13:23,831 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 543 [2019-11-20 02:13:23,832 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 595 [2019-11-20 02:13:23,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 779 states and 1012 transitions. [2019-11-20 02:13:23,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:13:23,833 INFO L688 BuchiCegarLoop]: Abstraction has 779 states and 1012 transitions. [2019-11-20 02:13:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states and 1012 transitions. [2019-11-20 02:13:23,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 590. [2019-11-20 02:13:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-20 02:13:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 756 transitions. [2019-11-20 02:13:23,856 INFO L711 BuchiCegarLoop]: Abstraction has 590 states and 756 transitions. [2019-11-20 02:13:23,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:13:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-20 02:13:23,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1910, Unknown=0, NotChecked=0, Total=2070 [2019-11-20 02:13:23,857 INFO L87 Difference]: Start difference. First operand 590 states and 756 transitions. Second operand 46 states. [2019-11-20 02:13:28,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:13:28,451 INFO L93 Difference]: Finished difference Result 495 states and 559 transitions. [2019-11-20 02:13:28,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-11-20 02:13:28,452 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 495 states and 559 transitions. [2019-11-20 02:13:28,463 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 18 [2019-11-20 02:13:28,472 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 495 states to 425 states and 478 transitions. [2019-11-20 02:13:28,476 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 328 [2019-11-20 02:13:28,477 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 328 [2019-11-20 02:13:28,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 425 states and 478 transitions. [2019-11-20 02:13:28,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 02:13:28,477 INFO L688 BuchiCegarLoop]: Abstraction has 425 states and 478 transitions. [2019-11-20 02:13:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states and 478 transitions. [2019-11-20 02:13:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 351. [2019-11-20 02:13:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-11-20 02:13:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 390 transitions. [2019-11-20 02:13:28,488 INFO L711 BuchiCegarLoop]: Abstraction has 351 states and 390 transitions. [2019-11-20 02:13:28,488 INFO L591 BuchiCegarLoop]: Abstraction has 351 states and 390 transitions. [2019-11-20 02:13:28,488 INFO L424 BuchiCegarLoop]: ======== Iteration 15============ [2019-11-20 02:13:28,488 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 351 states and 390 transitions. [2019-11-20 02:13:28,491 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2019-11-20 02:13:28,491 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 02:13:28,491 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 02:13:28,493 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [22, 16, 15, 10, 10, 6, 6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2019-11-20 02:13:28,493 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 3, 1, 1] [2019-11-20 02:13:28,493 INFO L794 eck$LassoCheckResult]: Stem: 21513#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~ret5, main_~m~0, main_~n~0, main_~result~0;main_~m~0 := main_#t~nondet3;havoc main_#t~nondet3; 21480#L27 assume !(main_~m~0 < 0 || main_~m~0 > 3);main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 21481#L33 assume !(main_~n~0 < 0 || main_~n~0 > 23); 21490#L39 call main_#t~ret5 := ackermann(main_~m~0, main_~n~0);< 21491#ackermannENTRY ~m := #in~m;~n := #in~n; 21540#L15 assume !(0 == ~m); 21681#L18 assume !(0 == ~n); 21534#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21537#ackermannENTRY ~m := #in~m;~n := #in~n; 21538#L15 assume !(0 == ~m); 21539#L18 assume !(0 == ~n); 21533#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21537#ackermannENTRY ~m := #in~m;~n := #in~n; 21536#L15 assume !(0 == ~m); 21535#L18 assume 0 == ~n; 21527#L19 call #t~ret0 := ackermann(~m - 1, 1);< 21531#ackermannENTRY ~m := #in~m;~n := #in~n; 21532#L15 assume !(0 == ~m); 21526#L18 assume !(0 == ~n); 21519#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21523#ackermannENTRY ~m := #in~m;~n := #in~n; 21524#L15 assume !(0 == ~m); 21518#L18 assume 0 == ~n; 21520#L19 call #t~ret0 := ackermann(~m - 1, 1);< 21501#ackermannENTRY ~m := #in~m;~n := #in~n; 21528#L15 assume !(0 == ~m); 21529#L18 assume !(0 == ~n); 21500#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21525#ackermannENTRY ~m := #in~m;~n := #in~n; 21521#L15 assume !(0 == ~m); 21522#L18 assume 0 == ~n; 21499#L19 call #t~ret0 := ackermann(~m - 1, 1);< 21501#ackermannENTRY ~m := #in~m;~n := #in~n; 21530#L15 assume 0 == ~m;#res := 1 + ~n; 21571#ackermannFINAL assume true; 21547#ackermannEXIT >#42#return; 21548#L19-1 #res := #t~ret0;havoc #t~ret0; 21578#ackermannFINAL assume true; 21577#ackermannEXIT >#44#return; 21575#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 21576#ackermannENTRY ~m := #in~m;~n := #in~n; 21580#L15 assume 0 == ~m;#res := 1 + ~n; 21579#ackermannFINAL assume true; 21574#ackermannEXIT >#46#return; 21573#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 21572#ackermannFINAL assume true; 21570#ackermannEXIT >#42#return; 21564#L19-1 #res := #t~ret0;havoc #t~ret0; 21560#ackermannFINAL assume true; 21558#ackermannEXIT >#44#return; 21555#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 21556#ackermannENTRY ~m := #in~m;~n := #in~n; 21582#L15 assume !(0 == ~m); 21581#L18 assume !(0 == ~n); 21568#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21569#ackermannENTRY ~m := #in~m;~n := #in~n; 21661#L15 assume !(0 == ~m); 21660#L18 assume !(0 == ~n); 21493#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21505#ackermannENTRY ~m := #in~m;~n := #in~n; 21506#L15 assume !(0 == ~m); 21827#L18 assume !(0 == ~n); 21488#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21826#ackermannENTRY ~m := #in~m;~n := #in~n; 21830#L15 assume !(0 == ~m); 21829#L18 assume 0 == ~n; 21585#L19 call #t~ret0 := ackermann(~m - 1, 1);< 21551#ackermannENTRY ~m := #in~m;~n := #in~n; 21591#L15 assume 0 == ~m;#res := 1 + ~n; 21583#ackermannFINAL assume true; 21587#ackermannEXIT >#42#return; 21512#L19-1 #res := #t~ret0;havoc #t~ret0; 21503#ackermannFINAL assume true; 21517#ackermannEXIT >#44#return; 21492#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 21494#ackermannENTRY ~m := #in~m;~n := #in~n; 21504#L15 assume 0 == ~m;#res := 1 + ~n; 21514#ackermannFINAL assume true; 21823#ackermannEXIT >#46#return; 21814#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 21812#ackermannFINAL assume true; 21659#ackermannEXIT >#44#return; 21631#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 21632#ackermannENTRY ~m := #in~m;~n := #in~n; 21664#L15 assume 0 == ~m;#res := 1 + ~n; 21658#ackermannFINAL assume true; 21630#ackermannEXIT >#46#return; 21628#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 21588#ackermannFINAL assume true; 21567#ackermannEXIT >#44#return; 21562#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 21563#ackermannENTRY ~m := #in~m;~n := #in~n; 21566#L15 assume 0 == ~m;#res := 1 + ~n; 21565#ackermannFINAL assume true; 21561#ackermannEXIT >#46#return; 21559#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 21557#ackermannFINAL assume true; 21554#ackermannEXIT >#46#return; 21553#L21-2 #res := #t~ret2;havoc #t~ret1;havoc #t~ret2; 21552#ackermannFINAL assume true; 21549#ackermannEXIT >#42#return; 21550#L19-1 #res := #t~ret0;havoc #t~ret0; 21673#ackermannFINAL assume true; 21672#ackermannEXIT >#44#return; 21656#L21-1 call #t~ret2 := ackermann(~m - 1, #t~ret1);< 21665#ackermannENTRY ~m := #in~m;~n := #in~n; 21666#L15 assume !(0 == ~m); 21655#L18 assume !(0 == ~n); 21650#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21649#ackermannENTRY ~m := #in~m;~n := #in~n; 21651#L15 assume !(0 == ~m); 21671#L18 assume !(0 == ~n); 21639#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21642#ackermannENTRY ~m := #in~m;~n := #in~n; 21640#L15 assume !(0 == ~m); 21638#L18 assume !(0 == ~n); 21620#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21733#ackermannENTRY ~m := #in~m;~n := #in~n; 21629#L15 assume !(0 == ~m); 21623#L18 assume 0 == ~n; 21544#L19 call #t~ret0 := ackermann(~m - 1, 1);< 21608#ackermannENTRY ~m := #in~m;~n := #in~n; 21604#L15 assume !(0 == ~m); 21601#L18 [2019-11-20 02:13:28,494 INFO L796 eck$LassoCheckResult]: Loop: 21601#L18 assume !(0 == ~n); 21597#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21598#ackermannENTRY ~m := #in~m;~n := #in~n; 21614#L15 assume !(0 == ~m); 21615#L18 assume !(0 == ~n); 21622#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21636#ackermannENTRY ~m := #in~m;~n := #in~n; 21633#L15 assume !(0 == ~m); 21618#L18 assume !(0 == ~n); 21613#L21 call #t~ret1 := ackermann(~m, ~n - 1);< 21619#ackermannENTRY ~m := #in~m;~n := #in~n; 21617#L15 assume !(0 == ~m); 21616#L18 assume 0 == ~n; 21545#L19 call #t~ret0 := ackermann(~m - 1, 1);< 21607#ackermannENTRY ~m := #in~m;~n := #in~n; 21603#L15 assume !(0 == ~m); 21601#L18 [2019-11-20 02:13:28,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1871853113, now seen corresponding path program 10 times [2019-11-20 02:13:28,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:13:28,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051671015] [2019-11-20 02:13:28,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:13:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 456 proven. 73 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2019-11-20 02:13:29,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051671015] [2019-11-20 02:13:29,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223419874] [2019-11-20 02:13:29,052 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:13:29,135 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 02:13:29,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:13:29,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-20 02:13:29,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 435 proven. 85 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-11-20 02:13:29,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:13:29,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 28 [2019-11-20 02:13:29,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288281712] [2019-11-20 02:13:29,188 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-20 02:13:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1601829226, now seen corresponding path program 2 times [2019-11-20 02:13:29,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:13:29,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559978792] [2019-11-20 02:13:29,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:13:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:13:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:13:29,197 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:13:29,619 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:13:29,619 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:13:29,619 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:13:29,619 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:13:29,619 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 02:13:29,619 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:29,619 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:13:29,619 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:13:29,620 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration15_Loop [2019-11-20 02:13:29,620 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:13:29,620 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:13:29,620 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 02:13:29,623 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 02:13:29,625 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 02:13:29,632 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 02:13:29,634 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 02:13:29,645 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 02:13:29,769 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:13:29,769 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 189 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 189 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:29,773 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:13:29,774 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:13:29,777 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:13:29,777 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret0=0} Honda state: {ackermann_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 190 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 190 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:29,782 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:13:29,782 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:13:29,785 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 02:13:29,785 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ackermann_#t~ret1=0} Honda state: {ackermann_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 191 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 191 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:29,791 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 02:13:29,791 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 192 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 192 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:29,801 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 02:13:29,801 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 02:13:29,921 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 02:13:29,923 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 02:13:29,923 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 02:13:29,923 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 02:13:29,923 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 02:13:29,923 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 02:13:29,923 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:29,923 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 02:13:29,923 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 02:13:29,923 INFO L133 ssoRankerPreferences]: Filename of dumped script: Ackermann02.c_Iteration15_Loop [2019-11-20 02:13:29,924 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 02:13:29,924 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 02:13:29,924 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 02:13:29,931 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 02:13:29,937 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 02:13:29,939 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 02:13:29,941 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 02:13:29,949 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 02:13:30,052 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 02:13:30,052 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 193 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 193 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:30,057 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:13:30,058 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:13:30,058 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:13:30,058 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:13:30,058 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:13:30,059 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:13:30,059 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:13:30,059 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:13:30,060 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 194 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 194 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:30,072 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 02:13:30,074 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 02:13:30,074 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 02:13:30,074 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 02:13:30,074 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 02:13:30,074 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 02:13:30,075 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 02:13:30,075 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 02:13:30,078 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 02:13:30,079 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 02:13:30,080 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_d1438c99-d090-4ed9-860f-fc4050673f5a/bin/uautomizer/z3 Starting monitored process 195 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 195 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 02:13:30,083 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 02:13:30,083 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 02:13:30,083 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 02:13:30,083 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ackermann_~n) = 1*ackermann_~n Supporting invariants [] [2019-11-20 02:13:30,085 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 02:13:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:30,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-20 02:13:30,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:30,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,277 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:30,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 02:13:30,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:13:30,440 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2019-11-20 02:13:30,440 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 351 states and 390 transitions. cyclomatic complexity: 44 Second operand 13 states. [2019-11-20 02:13:30,627 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 351 states and 390 transitions. cyclomatic complexity: 44. Second operand 13 states. Result 397 states and 449 transitions. Complement of second has 26 states. [2019-11-20 02:13:30,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2019-11-20 02:13:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 02:13:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 23 transitions. [2019-11-20 02:13:30,631 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 23 transitions. Stem has 123 letters. Loop has 16 letters. [2019-11-20 02:13:30,631 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:30,631 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:13:30,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:30,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-20 02:13:30,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:30,824 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:30,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 02:13:30,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:13:30,989 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2019-11-20 02:13:30,989 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 351 states and 390 transitions. cyclomatic complexity: 44 Second operand 13 states. [2019-11-20 02:13:31,371 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 351 states and 390 transitions. cyclomatic complexity: 44. Second operand 13 states. Result 416 states and 472 transitions. Complement of second has 33 states. [2019-11-20 02:13:31,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2019-11-20 02:13:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 02:13:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 26 transitions. [2019-11-20 02:13:31,372 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 26 transitions. Stem has 123 letters. Loop has 16 letters. [2019-11-20 02:13:31,372 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:31,372 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:13:31,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:31,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-20 02:13:31,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:31,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:31,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 02:13:31,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:13:31,772 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 10 loop predicates [2019-11-20 02:13:31,772 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 351 states and 390 transitions. cyclomatic complexity: 44 Second operand 13 states. [2019-11-20 02:13:32,081 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 351 states and 390 transitions. cyclomatic complexity: 44. Second operand 13 states. Result 702 states and 786 transitions. Complement of second has 73 states. [2019-11-20 02:13:32,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2019-11-20 02:13:32,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 02:13:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2019-11-20 02:13:32,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 123 letters. Loop has 16 letters. [2019-11-20 02:13:32,084 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:32,084 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 02:13:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:13:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:32,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-20 02:13:32,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:32,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,324 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 02:13:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:13:32,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 02:13:32,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:13:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:13:32,501 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 10 loop predicates [2019-11-20 02:13:32,501 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 351 states and 390 transitions. cyclomatic complexity: 44 Second operand 13 states. [2019-11-20 02:13:33,095 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 351 states and 390 transitions. cyclomatic complexity: 44. Second operand 13 states. Result 1322 states and 1521 transitions. Complement of second has 274 states. [2019-11-20 02:13:33,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 16 states 2 stem states 13 non-accepting loop states 1 accepting loop states [2019-11-20 02:13:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-20 02:13:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 69 transitions. [2019-11-20 02:13:33,098 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 69 transitions. Stem has 123 letters. Loop has 16 letters. [2019-11-20 02:13:33,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:33,100 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 69 transitions. Stem has 139 letters. Loop has 16 letters. [2019-11-20 02:13:33,101 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:33,101 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 69 transitions. Stem has 123 letters. Loop has 32 letters. [2019-11-20 02:13:33,102 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 02:13:33,103 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1322 states and 1521 transitions. [2019-11-20 02:13:33,116 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 02:13:33,117 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1322 states to 0 states and 0 transitions. [2019-11-20 02:13:33,117 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 02:13:33,117 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 02:13:33,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 02:13:33,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 02:13:33,118 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:13:33,118 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:13:33,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:13:33,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-20 02:13:33,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2019-11-20 02:13:33,119 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 28 states. [2019-11-20 02:13:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:13:33,119 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-20 02:13:33,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 02:13:33,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-20 02:13:33,121 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 02:13:33,122 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 02:13:33,122 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 02:13:33,122 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 02:13:33,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 02:13:33,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 02:13:33,122 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:13:33,122 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:13:33,123 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 02:13:33,123 INFO L424 BuchiCegarLoop]: ======== Iteration 16============ [2019-11-20 02:13:33,123 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 02:13:33,123 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 02:13:33,123 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 02:13:33,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 02:13:33 BoogieIcfgContainer [2019-11-20 02:13:33,134 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 02:13:33,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 02:13:33,135 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 02:13:33,135 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 02:13:33,135 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:12:33" (3/4) ... [2019-11-20 02:13:33,140 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 02:13:33,140 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 02:13:33,144 INFO L168 Benchmark]: Toolchain (without parser) took 60326.43 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 561.5 MB). Free memory was 946.1 MB in the beginning and 988.1 MB in the end (delta: -41.9 MB). Peak memory consumption was 519.6 MB. Max. memory is 11.5 GB. [2019-11-20 02:13:33,144 INFO L168 Benchmark]: CDTParser took 0.22 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 02:13:33,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -201.8 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:13:33,145 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.47 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 02:13:33,145 INFO L168 Benchmark]: Boogie Preprocessor took 26.02 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:13:33,146 INFO L168 Benchmark]: RCFGBuilder took 268.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 02:13:33,146 INFO L168 Benchmark]: BuchiAutomizer took 59616.84 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 411.0 MB). Free memory was 1.1 GB in the beginning and 988.1 MB in the end (delta: 138.8 MB). Peak memory consumption was 549.8 MB. Max. memory is 11.5 GB. [2019-11-20 02:13:33,146 INFO L168 Benchmark]: Witness Printer took 5.85 ms. Allocated memory is still 1.6 GB. Free memory is still 988.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:13:33,148 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 367.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -201.8 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.47 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 26.02 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 268.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 59616.84 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 411.0 MB). Free memory was 1.1 GB in the beginning and 988.1 MB in the end (delta: 138.8 MB). Peak memory consumption was 549.8 MB. Max. memory is 11.5 GB. * Witness Printer took 5.85 ms. Allocated memory is still 1.6 GB. Free memory is still 988.1 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 19 terminating modules (11 trivial, 4 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 5 locations. One deterministic module has affine ranking function -2 * \old(n) + 1 and consists of 4 locations. One deterministic module has affine ranking function \old(m) and consists of 11 locations. One deterministic module has affine ranking function m and consists of 12 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. One nondeterministic module has affine ranking function \old(n) and consists of 25 locations. One nondeterministic module has affine ranking function -1 * aux-ackermann(m,n-1)-aux + 4 and consists of 61 locations. One nondeterministic module has affine ranking function n and consists of 16 locations. 11 modules have a trivial ranking function, the largest among these consists of 56 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 59.5s and 16 iterations. TraceHistogramMax:61. Analysis of lassos took 27.9s. Construction of modules took 7.5s. Büchi inclusion checks took 23.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 17. Automata minimization 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 604 StatesRemovedByMinimization, 17 NontrivialMinimizations. Non-live state removal took 0.2s Buchi closure took 0.0s. Biggest automaton had 351 states and ocurred in iteration 14. Nontrivial modules had stage [3, 1, 3, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 466/689 HoareTripleCheckerStatistics: 563 SDtfs, 1314 SDslu, 1680 SDs, 0 SdLazy, 8647 SolverSat, 2911 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.5s Time LassoAnalysisResults: nont0 unkn0 SFLI3 SFLT0 conc0 concLT3 SILN2 SILU0 SILI2 SILT1 lasso4 LassoPreprocessingBenchmarks: Lassos: inital27 mio100 ax100 hnf100 lsp61 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq191 hnf94 smp94 dnf155 smp94 tf103 neg95 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 189ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 87 LassoNonterminationAnalysisSatUnbounded: 6 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...