./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-restricted-15/GCD4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-restricted-15/GCD4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e1a6e72adfb4c8fee6c8faa90b8bdc807e2f6147 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 20:30:53,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:30:53,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:30:53,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:30:53,755 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:30:53,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:30:53,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:30:53,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:30:53,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:30:53,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:30:53,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:30:53,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:30:53,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:30:53,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:30:53,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:30:53,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:30:53,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:30:53,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:30:53,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:30:53,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:30:53,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:30:53,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:30:53,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:30:53,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:30:53,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:30:53,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:30:53,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:30:53,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:30:53,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:30:53,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:30:53,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:30:53,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:30:53,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:30:53,789 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:30:53,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:30:53,791 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:30:53,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:30:53,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:30:53,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:30:53,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:30:53,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:30:53,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 20:30:53,817 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:30:53,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:30:53,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:30:53,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:30:53,820 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:30:53,820 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 20:30:53,820 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 20:30:53,820 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 20:30:53,821 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 20:30:53,821 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 20:30:53,822 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 20:30:53,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:30:53,823 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:30:53,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:30:53,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:30:53,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 20:30:53,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 20:30:53,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 20:30:53,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 20:30:53,825 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 20:30:53,825 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:30:53,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 20:30:53,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:30:53,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:30:53,827 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 20:30:53,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:30:53,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:30:53,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:30:53,828 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 20:30:53,829 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 20:30:53,830 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1a6e72adfb4c8fee6c8faa90b8bdc807e2f6147 [2019-11-28 20:30:54,143 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:30:54,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:30:54,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:30:54,170 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:30:54,171 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:30:54,172 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/GCD4.c [2019-11-28 20:30:54,247 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38deddb8/fd769e54d16344f7ab5049871ce1bf9f/FLAGba7d7953c [2019-11-28 20:30:54,719 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:30:54,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/GCD4.c [2019-11-28 20:30:54,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38deddb8/fd769e54d16344f7ab5049871ce1bf9f/FLAGba7d7953c [2019-11-28 20:30:55,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c38deddb8/fd769e54d16344f7ab5049871ce1bf9f [2019-11-28 20:30:55,089 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:30:55,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 20:30:55,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:30:55,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:30:55,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:30:55,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5896c8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55, skipping insertion in model container [2019-11-28 20:30:55,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:30:55,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:30:55,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:30:55,288 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:30:55,305 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:30:55,321 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:30:55,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55 WrapperNode [2019-11-28 20:30:55,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:30:55,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 20:30:55,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 20:30:55,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 20:30:55,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 20:30:55,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:30:55,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:30:55,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:30:55,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... [2019-11-28 20:30:55,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:30:55,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:30:55,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:30:55,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:30:55,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 20:30:55,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:30:55,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:30:55,631 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:30:55,631 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-28 20:30:55,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:30:55 BoogieIcfgContainer [2019-11-28 20:30:55,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:30:55,633 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 20:30:55,633 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 20:30:55,636 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 20:30:55,637 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:30:55,638 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 08:30:55" (1/3) ... [2019-11-28 20:30:55,639 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@51c67887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:30:55, skipping insertion in model container [2019-11-28 20:30:55,639 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:30:55,639 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:30:55" (2/3) ... [2019-11-28 20:30:55,640 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@51c67887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:30:55, skipping insertion in model container [2019-11-28 20:30:55,640 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:30:55,640 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:30:55" (3/3) ... [2019-11-28 20:30:55,642 INFO L371 chiAutomizerObserver]: Analyzing ICFG GCD4.c [2019-11-28 20:30:55,690 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 20:30:55,691 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 20:30:55,691 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 20:30:55,691 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:30:55,691 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:30:55,691 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 20:30:55,691 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:30:55,692 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 20:30:55,706 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-28 20:30:55,728 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:30:55,728 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:30:55,728 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:30:55,735 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 20:30:55,736 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 20:30:55,736 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 20:30:55,736 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-28 20:30:55,737 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:30:55,737 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:30:55,737 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:30:55,738 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 20:30:55,738 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 20:30:55,746 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L13-2true [2019-11-28 20:30:55,747 INFO L796 eck$LassoCheckResult]: Loop: 6#L13-2true assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 3#L17-2true assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 9#L17-3true main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 6#L13-2true [2019-11-28 20:30:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:55,752 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-28 20:30:55,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:55,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292861575] [2019-11-28 20:30:55,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:55,857 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:55,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:55,858 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2019-11-28 20:30:55,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:55,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180037657] [2019-11-28 20:30:55,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:55,881 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2019-11-28 20:30:55,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:55,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392110404] [2019-11-28 20:30:55,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:55,901 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:56,039 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:30:56,039 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:30:56,040 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:30:56,040 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:30:56,040 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:30:56,040 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:56,041 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:30:56,041 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:30:56,041 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2019-11-28 20:30:56,041 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:30:56,041 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:30:56,068 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:56,096 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:56,103 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:56,286 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:30:56,287 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:56,299 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:30:56,299 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 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:56,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:30:56,329 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 [2019-11-28 20:30:57,225 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:30:57,229 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:30:57,229 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:30:57,229 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:30:57,229 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:30:57,229 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:30:57,230 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:57,230 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:30:57,230 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:30:57,230 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2019-11-28 20:30:57,230 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:30:57,230 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:30:57,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:57,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:57,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:57,373 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:30:57,379 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:57,388 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:57,391 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:30:57,391 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:30:57,392 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:30:57,392 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:30:57,398 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:30:57,398 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:30:57,404 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:57,424 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 [2019-11-28 20:30:57,426 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:30:57,427 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:30:57,427 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:30:57,427 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:30:57,428 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:30:57,431 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:30:57,431 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:57,439 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:30:57,448 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:30:57,449 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:57,464 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:30:57,465 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:30:57,465 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:30:57,466 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2019-11-28 20:30:57,473 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:57,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:30:57,521 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:57,537 WARN L262 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 20:30:57,538 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:57,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 20:30:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:30:57,626 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 [2019-11-28 20:30:57,627 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 4 states. [2019-11-28 20:30:57,747 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 4 states. Result 33 states and 49 transitions. Complement of second has 10 states. [2019-11-28 20:30:57,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 20:30:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 20:30:57,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 24 transitions. [2019-11-28 20:30:57,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 3 letters. [2019-11-28 20:30:57,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:57,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 4 letters. Loop has 3 letters. [2019-11-28 20:30:57,755 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:57,755 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 6 letters. [2019-11-28 20:30:57,756 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:57,757 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 49 transitions. [2019-11-28 20:30:57,761 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-11-28 20:30:57,765 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 11 states and 16 transitions. [2019-11-28 20:30:57,766 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-28 20:30:57,767 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-11-28 20:30:57,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2019-11-28 20:30:57,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:30:57,768 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-11-28 20:30:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2019-11-28 20:30:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-28 20:30:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-28 20:30:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2019-11-28 20:30:57,797 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2019-11-28 20:30:57,797 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2019-11-28 20:30:57,797 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 20:30:57,797 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 15 transitions. [2019-11-28 20:30:57,798 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-11-28 20:30:57,798 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:30:57,798 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:30:57,799 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-28 20:30:57,799 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-28 20:30:57,799 INFO L794 eck$LassoCheckResult]: Stem: 90#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 91#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 86#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 87#L17-2 [2019-11-28 20:30:57,799 INFO L796 eck$LassoCheckResult]: Loop: 87#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 87#L17-2 [2019-11-28 20:30:57,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:57,800 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2019-11-28 20:30:57,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:57,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503401733] [2019-11-28 20:30:57,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:57,823 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2019-11-28 20:30:57,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:57,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992301398] [2019-11-28 20:30:57,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:57,842 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:57,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:57,844 INFO L82 PathProgramCache]: Analyzing trace with hash 963530, now seen corresponding path program 2 times [2019-11-28 20:30:57,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:57,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399411758] [2019-11-28 20:30:57,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:57,864 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:57,900 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:30:57,900 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:30:57,900 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:30:57,900 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:30:57,900 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:30:57,900 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:57,901 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:30:57,901 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:30:57,901 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2019-11-28 20:30:57,901 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:30:57,901 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:30:57,903 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:57,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:57,911 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:57,979 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:30:57,979 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:57,993 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:30:57,993 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 [2019-11-28 20:30:57,998 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:30:57,998 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:58,015 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:30:58,015 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:30:58,019 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:30:58,020 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:58,036 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:30:58,037 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:58,050 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:30:58,050 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:30:58,163 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:30:58,165 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:30:58,165 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:30:58,165 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:30:58,165 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:30:58,165 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:30:58,166 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:58,168 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:30:58,168 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:30:58,169 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2019-11-28 20:30:58,169 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:30:58,169 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:30:58,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:58,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:58,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:58,239 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:30:58,240 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:58,246 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 [2019-11-28 20:30:58,249 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:30:58,249 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:30:58,249 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:30:58,250 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:30:58,255 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:30:58,258 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:58,264 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:58,283 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 [2019-11-28 20:30:58,285 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:30:58,286 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:30:58,286 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:30:58,286 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:30:58,294 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:30:58,296 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:58,302 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:58,319 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 [2019-11-28 20:30:58,323 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:30:58,323 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:30:58,324 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:30:58,324 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:30:58,324 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:30:58,328 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:30:58,328 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:58,333 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:30:58,370 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-28 20:30:58,370 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:58,386 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:30:58,386 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:30:58,386 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:30:58,387 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-11-28 20:30:58,390 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:58,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:58,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:30:58,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:58,427 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 20:30:58,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:30:58,429 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-11-28 20:30:58,429 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 15 transitions. cyclomatic complexity: 8 Second operand 2 states. [2019-11-28 20:30:58,445 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 15 transitions. cyclomatic complexity: 8. Second operand 2 states. Result 15 states and 22 transitions. Complement of second has 5 states. [2019-11-28 20:30:58,447 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 [2019-11-28 20:30:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-28 20:30:58,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-11-28 20:30:58,448 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 1 letters. [2019-11-28 20:30:58,450 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:58,450 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 1 letters. [2019-11-28 20:30:58,450 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:58,450 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-28 20:30:58,450 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:58,451 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 22 transitions. [2019-11-28 20:30:58,452 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:30:58,454 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 13 states and 19 transitions. [2019-11-28 20:30:58,454 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-11-28 20:30:58,455 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-11-28 20:30:58,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-11-28 20:30:58,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:30:58,455 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-11-28 20:30:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-11-28 20:30:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2019-11-28 20:30:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 20:30:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2019-11-28 20:30:58,461 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2019-11-28 20:30:58,461 INFO L591 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2019-11-28 20:30:58,462 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 20:30:58,462 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 17 transitions. [2019-11-28 20:30:58,463 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:30:58,464 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:30:58,464 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:30:58,466 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-28 20:30:58,471 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 20:30:58,472 INFO L794 eck$LassoCheckResult]: Stem: 146#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 147#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 150#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 153#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 144#L17-3 [2019-11-28 20:30:58,472 INFO L796 eck$LassoCheckResult]: Loop: 144#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 148#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 143#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 144#L17-3 [2019-11-28 20:30:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 1 times [2019-11-28 20:30:58,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:58,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634907952] [2019-11-28 20:30:58,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:58,498 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:58,499 INFO L82 PathProgramCache]: Analyzing trace with hash 52221, now seen corresponding path program 2 times [2019-11-28 20:30:58,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:58,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479683484] [2019-11-28 20:30:58,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:58,517 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:58,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:58,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285994, now seen corresponding path program 1 times [2019-11-28 20:30:58,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:58,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176755858] [2019-11-28 20:30:58,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:58,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 20:30:58,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176755858] [2019-11-28 20:30:58,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492055284] [2019-11-28 20:30:58,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:30:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:58,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 20:30:58,706 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:58,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 20:30:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 20:30:58,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:30:58,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-28 20:30:58,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909306459] [2019-11-28 20:30:58,835 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:30:58,836 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:30:58,836 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:30:58,836 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:30:58,836 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:30:58,836 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:58,836 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:30:58,837 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:30:58,837 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2019-11-28 20:30:58,837 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:30:58,837 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:30:58,840 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:58,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:58,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:58,949 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:30:58,949 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:58,955 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:30:58,956 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:58,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:30:58,985 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:03,414 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:31:03,417 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:31:03,417 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:31:03,417 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:31:03,417 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:31:03,417 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:31:03,417 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:03,417 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:31:03,418 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:31:03,418 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2019-11-28 20:31:03,418 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:31:03,418 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:31:03,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:03,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:03,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:03,499 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:31:03,499 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:03,509 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 [2019-11-28 20:31:03,511 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:31:03,511 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:31:03,511 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:31:03,511 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:31:03,516 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:31:03,516 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:31:03,527 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:31:03,540 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 [2019-11-28 20:31:03,542 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:31:03,542 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:31:03,542 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:31:03,543 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:31:03,543 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:31:03,547 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:31:03,547 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 [2019-11-28 20:31:03,552 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:31:03,560 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:31:03,561 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:31:03,566 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:31:03,566 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:31:03,566 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:31:03,567 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-11-28 20:31:03,570 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:03,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:31:03,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:03,623 WARN L262 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 20:31:03,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:31:03,651 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 [2019-11-28 20:31:03,651 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-11-28 20:31:03,696 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 9. Second operand 4 states. Result 33 states and 52 transitions. Complement of second has 10 states. [2019-11-28 20:31:03,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 20:31:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 20:31:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2019-11-28 20:31:03,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 3 letters. [2019-11-28 20:31:03,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:03,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 7 letters. Loop has 3 letters. [2019-11-28 20:31:03,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:03,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 6 letters. [2019-11-28 20:31:03,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:03,700 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 52 transitions. [2019-11-28 20:31:03,701 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-11-28 20:31:03,702 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 24 states and 35 transitions. [2019-11-28 20:31:03,703 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-11-28 20:31:03,703 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-11-28 20:31:03,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2019-11-28 20:31:03,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:31:03,704 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2019-11-28 20:31:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2019-11-28 20:31:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-28 20:31:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 20:31:03,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2019-11-28 20:31:03,707 INFO L711 BuchiCegarLoop]: Abstraction has 22 states and 33 transitions. [2019-11-28 20:31:03,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:31:03,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 20:31:03,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-28 20:31:03,712 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand 9 states. [2019-11-28 20:31:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:31:03,883 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2019-11-28 20:31:03,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 20:31:03,884 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2019-11-28 20:31:03,886 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2019-11-28 20:31:03,886 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 26 transitions. [2019-11-28 20:31:03,887 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2019-11-28 20:31:03,890 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 20:31:03,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 26 transitions. [2019-11-28 20:31:03,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:31:03,891 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 26 transitions. [2019-11-28 20:31:03,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 26 transitions. [2019-11-28 20:31:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2019-11-28 20:31:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-28 20:31:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-28 20:31:03,896 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-28 20:31:03,896 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-28 20:31:03,896 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 20:31:03,896 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2019-11-28 20:31:03,897 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-28 20:31:03,898 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:31:03,898 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:31:03,899 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-28 20:31:03,899 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 20:31:03,900 INFO L794 eck$LassoCheckResult]: Stem: 322#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 323#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 326#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 325#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 321#L17-3 [2019-11-28 20:31:03,900 INFO L796 eck$LassoCheckResult]: Loop: 321#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 324#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 318#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 319#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 321#L17-3 [2019-11-28 20:31:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:03,900 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 2 times [2019-11-28 20:31:03,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:31:03,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352158329] [2019-11-28 20:31:03,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:31:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:03,915 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:31:03,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:03,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1618930, now seen corresponding path program 1 times [2019-11-28 20:31:03,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:31:03,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041815381] [2019-11-28 20:31:03,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 20:31:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:03,954 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:31:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash 780807225, now seen corresponding path program 2 times [2019-11-28 20:31:03,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:31:03,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288762180] [2019-11-28 20:31:03,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:31:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:03,988 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:31:04,045 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:31:04,046 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:31:04,046 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:31:04,046 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:31:04,046 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:31:04,046 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:04,046 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:31:04,046 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:31:04,046 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2019-11-28 20:31:04,046 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:31:04,046 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:31:04,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:04,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:04,054 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:04,119 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:31:04,119 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:04,124 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:31:04,124 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:31:04,128 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:31:04,128 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:04,145 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:31:04,146 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:31:04,149 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:31:04,149 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_7=0} Honda state: {v_rep~unnamed0~0~false_7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:31:04,156 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:31:04,157 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:04,175 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:31:04,175 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:31:16,203 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-11-28 20:31:16,207 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:31:16,207 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:31:16,207 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:31:16,207 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:31:16,207 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:31:16,208 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,208 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:31:16,208 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:31:16,208 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2019-11-28 20:31:16,208 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:31:16,208 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:31:16,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:16,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:16,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:16,304 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:31:16,305 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,311 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 [2019-11-28 20:31:16,313 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:31:16,313 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:31:16,313 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:31:16,313 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:31:16,313 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:31:16,315 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:31:16,315 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:31:16,318 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:31:16,323 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:31:16,323 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,333 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:31:16,333 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:31:16,333 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:31:16,333 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-11-28 20:31:16,336 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 20:31:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:16,355 INFO L264 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:31:16,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:16,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 20:31:16,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 20:31:16,382 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 [2019-11-28 20:31:16,382 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-11-28 20:31:16,416 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 23 states and 32 transitions. Complement of second has 6 states. [2019-11-28 20:31:16,420 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 [2019-11-28 20:31:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 20:31:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-11-28 20:31:16,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2019-11-28 20:31:16,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:16,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 4 letters. [2019-11-28 20:31:16,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:16,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 8 letters. [2019-11-28 20:31:16,422 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:16,422 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 32 transitions. [2019-11-28 20:31:16,423 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-28 20:31:16,424 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 27 transitions. [2019-11-28 20:31:16,424 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2019-11-28 20:31:16,424 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-11-28 20:31:16,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 27 transitions. [2019-11-28 20:31:16,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:31:16,425 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 27 transitions. [2019-11-28 20:31:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 27 transitions. [2019-11-28 20:31:16,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2019-11-28 20:31:16,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 20:31:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2019-11-28 20:31:16,427 INFO L711 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-28 20:31:16,428 INFO L591 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-28 20:31:16,428 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 20:31:16,428 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2019-11-28 20:31:16,429 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-28 20:31:16,429 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:31:16,429 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:31:16,429 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-28 20:31:16,430 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-28 20:31:16,430 INFO L794 eck$LassoCheckResult]: Stem: 405#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 406#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 415#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 412#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 411#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 407#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 402#L17-2 [2019-11-28 20:31:16,430 INFO L796 eck$LassoCheckResult]: Loop: 402#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 402#L17-2 [2019-11-28 20:31:16,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:16,430 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 3 times [2019-11-28 20:31:16,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:31:16,431 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121678566] [2019-11-28 20:31:16,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:31:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:16,444 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:31:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2019-11-28 20:31:16,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:31:16,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736047497] [2019-11-28 20:31:16,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:31:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:16,451 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:31:16,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:16,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285992, now seen corresponding path program 4 times [2019-11-28 20:31:16,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:31:16,452 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831919115] [2019-11-28 20:31:16,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:31:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:31:16,467 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:31:16,482 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:31:16,482 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:31:16,483 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:31:16,483 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:31:16,483 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:31:16,483 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,483 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:31:16,483 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:31:16,483 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2019-11-28 20:31:16,484 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:31:16,484 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:31:16,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:16,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:16,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:16,544 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:31:16,545 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,550 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:31:16,551 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:31:16,554 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:31:16,554 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,560 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:31:16,560 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:31:16,563 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:31:16,563 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:31:16,571 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,579 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:31:16,579 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:31:16,667 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:31:16,670 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:31:16,670 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:31:16,670 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:31:16,670 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:31:16,670 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:31:16,671 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,671 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:31:16,671 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:31:16,671 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2019-11-28 20:31:16,671 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:31:16,671 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:31:16,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:16,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:16,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:31:16,726 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:31:16,726 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,731 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 [2019-11-28 20:31:16,732 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:31:16,732 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:31:16,732 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:31:16,732 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:31:16,734 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:31:16,734 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:31:16,737 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,743 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 [2019-11-28 20:31:16,745 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:31:16,745 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:31:16,745 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:31:16,746 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:31:16,747 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:31:16,747 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:31:16,752 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:31:16,768 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 [2019-11-28 20:31:16,769 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:31:16,770 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:31:16,770 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:31:16,770 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:31:16,770 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:31:16,771 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:31:16,771 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 [2019-11-28 20:31:16,774 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:31:16,779 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-28 20:31:16,779 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:31:16,790 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:31:16,790 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:31:16,790 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:31:16,790 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:31:16,793 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 20:31:16,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:16,822 INFO L264 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:31:16,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:16,826 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 20:31:16,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:31:16,827 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-11-28 20:31:16,827 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-11-28 20:31:16,842 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9. Second operand 2 states. Result 20 states and 28 transitions. Complement of second has 5 states. [2019-11-28 20:31:16,842 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 [2019-11-28 20:31:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-28 20:31:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-28 20:31:16,843 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-11-28 20:31:16,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:16,843 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 20:31:16,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:16,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:31:16,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:16,865 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 20:31:16,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:31:16,866 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2019-11-28 20:31:16,866 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-11-28 20:31:16,877 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9. Second operand 2 states. Result 20 states and 28 transitions. Complement of second has 5 states. [2019-11-28 20:31:16,877 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 [2019-11-28 20:31:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-28 20:31:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-28 20:31:16,878 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-11-28 20:31:16,879 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:16,879 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 20:31:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:31:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:16,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:31:16,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:31:16,906 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 20:31:16,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:31:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:31:16,908 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-11-28 20:31:16,908 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-11-28 20:31:16,924 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9. Second operand 2 states. Result 22 states and 30 transitions. Complement of second has 4 states. [2019-11-28 20:31:16,925 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 [2019-11-28 20:31:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-28 20:31:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-11-28 20:31:16,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2019-11-28 20:31:16,926 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:16,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 1 letters. [2019-11-28 20:31:16,927 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:16,927 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-28 20:31:16,927 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:31:16,927 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 30 transitions. [2019-11-28 20:31:16,928 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:31:16,928 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 0 states and 0 transitions. [2019-11-28 20:31:16,928 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 20:31:16,928 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 20:31:16,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 20:31:16,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 20:31:16,929 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:31:16,929 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:31:16,929 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:31:16,929 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 20:31:16,929 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 20:31:16,929 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:31:16,929 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 20:31:16,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 08:31:16 BoogieIcfgContainer [2019-11-28 20:31:16,937 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 20:31:16,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:31:16,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:31:16,938 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:31:16,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:30:55" (3/4) ... [2019-11-28 20:31:16,943 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 20:31:16,943 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:31:16,946 INFO L168 Benchmark]: Toolchain (without parser) took 21853.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 951.0 MB in the beginning and 1.0 GB in the end (delta: -61.9 MB). Peak memory consumption was 121.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:31:16,946 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:31:16,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 230.23 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:31:16,948 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -171.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:31:16,949 INFO L168 Benchmark]: Boogie Preprocessor took 19.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-28 20:31:16,950 INFO L168 Benchmark]: RCFGBuilder took 201.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-28 20:31:16,950 INFO L168 Benchmark]: BuchiAutomizer took 21304.12 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 74.4 MB). Peak memory consumption was 148.9 MB. Max. memory is 11.5 GB. [2019-11-28 20:31:16,951 INFO L168 Benchmark]: Witness Printer took 5.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:31:16,955 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 230.23 ms. Allocated memory is still 1.0 GB. Free memory was 951.0 MB in the beginning and 940.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 86.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -171.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 201.55 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 21304.12 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 74.4 MB). Peak memory consumption was 148.9 MB. Max. memory is 11.5 GB. * Witness Printer took 5.62 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. 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 6 terminating modules (1 trivial, 4 deterministic, 1 nondeterministic). One deterministic module has affine ranking function y and consists of 6 locations. One deterministic module has affine ranking function xtmp and consists of 3 locations. One deterministic module has affine ranking function xtmp and consists of 6 locations. One deterministic module has affine ranking function xtmp and consists of 4 locations. One nondeterministic module has affine ranking function xtmp and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 9 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.2s and 6 iterations. TraceHistogramMax:2. Analysis of lassos took 20.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 14 states and ocurred in iteration 4. Nontrivial modules had stage [4, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 33 SDtfs, 45 SDslu, 9 SDs, 0 SdLazy, 102 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax165 hnf95 lsp58 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq166 hnf91 smp100 dnf100 smp100 tf108 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 23ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 1 LassoNonterminationAnalysisTime: 17.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...