./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 678e0110 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 0.1.24-678e011 [2019-11-19 22:20:37,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:20:37,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:20:37,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:20:37,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:20:37,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:20:37,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:20:37,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:20:37,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:20:37,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:20:37,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:20:37,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:20:37,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:20:37,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:20:37,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:20:37,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:20:37,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:20:37,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:20:37,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:20:37,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:20:37,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:20:37,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:20:37,781 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:20:37,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:20:37,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:20:37,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:20:37,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:20:37,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:20:37,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:20:37,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:20:37,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:20:37,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:20:37,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:20:37,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:20:37,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:20:37,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:20:37,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:20:37,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:20:37,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:20:37,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:20:37,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:20:37,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-19 22:20:37,817 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:20:37,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:20:37,819 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:20:37,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:20:37,819 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:20:37,820 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-19 22:20:37,820 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-19 22:20:37,820 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-19 22:20:37,820 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-19 22:20:37,821 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-19 22:20:37,821 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-19 22:20:37,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:20:37,822 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 22:20:37,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:20:37,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:20:37,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-19 22:20:37,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-19 22:20:37,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-19 22:20:37,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 22:20:37,824 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-19 22:20:37,824 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:20:37,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-19 22:20:37,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:20:37,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:20:37,825 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-19 22:20:37,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:20:37,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 22:20:37,826 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-19 22:20:37,827 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-19 22:20:37,828 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 [2019-11-19 22:20:38,176 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:20:38,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:20:38,202 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:20:38,204 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:20:38,204 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:20:38,206 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-restricted-15/GCD4.c [2019-11-19 22:20:38,281 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c659d1383/12efbc4d0cce440bac687c80d59618b1/FLAGe9323c2c3 [2019-11-19 22:20:38,725 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:20:38,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-restricted-15/GCD4.c [2019-11-19 22:20:38,730 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c659d1383/12efbc4d0cce440bac687c80d59618b1/FLAGe9323c2c3 [2019-11-19 22:20:39,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c659d1383/12efbc4d0cce440bac687c80d59618b1 [2019-11-19 22:20:39,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:20:39,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 22:20:39,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:20:39,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:20:39,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:20:39,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ee515f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39, skipping insertion in model container [2019-11-19 22:20:39,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,117 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:20:39,137 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:20:39,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:20:39,331 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:20:39,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:20:39,361 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:20:39,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39 WrapperNode [2019-11-19 22:20:39,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:20:39,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 22:20:39,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 22:20:39,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 22:20:39,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 22:20:39,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:20:39,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:20:39,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:20:39,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (1/1) ... [2019-11-19 22:20:39,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:20:39,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:20:39,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:20:39,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:20:39,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (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 [2019-11-19 22:20:39,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:20:39,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:20:39,661 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:20:39,661 INFO L285 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-19 22:20:39,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:20:39 BoogieIcfgContainer [2019-11-19 22:20:39,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:20:39,663 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-19 22:20:39,663 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-19 22:20:39,666 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-19 22:20:39,667 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:20:39,667 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.11 10:20:39" (1/3) ... [2019-11-19 22:20:39,668 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@546a159a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 10:20:39, skipping insertion in model container [2019-11-19 22:20:39,668 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:20:39,668 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:20:39" (2/3) ... [2019-11-19 22:20:39,669 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@546a159a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.11 10:20:39, skipping insertion in model container [2019-11-19 22:20:39,669 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-19 22:20:39,669 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:20:39" (3/3) ... [2019-11-19 22:20:39,671 INFO L371 chiAutomizerObserver]: Analyzing ICFG GCD4.c [2019-11-19 22:20:39,715 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-19 22:20:39,715 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-19 22:20:39,715 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-19 22:20:39,715 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:20:39,716 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:20:39,716 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-19 22:20:39,716 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:20:39,716 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-19 22:20:39,729 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-19 22:20:39,748 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:20:39,748 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:39,748 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:39,754 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-19 22:20:39,754 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 22:20:39,754 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-19 22:20:39,754 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-19 22:20:39,755 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:20:39,756 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:39,756 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:39,756 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-19 22:20:39,757 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 22:20:39,763 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L13-2true [2019-11-19 22:20:39,763 INFO L796 eck$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 [2019-11-19 22:20:39,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,768 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-19 22:20:39,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:39,775 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629939043] [2019-11-19 22:20:39,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,857 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2019-11-19 22:20:39,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:39,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818146091] [2019-11-19 22:20:39,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,880 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:39,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:39,881 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2019-11-19 22:20:39,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:39,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454168841] [2019-11-19 22:20:39,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:39,898 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:40,041 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2019-11-19 22:20:40,078 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:40,079 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:40,087 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:40,088 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:40,088 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:20:40,088 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,088 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:40,089 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:40,089 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2019-11-19 22:20:40,089 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:40,089 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:40,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:40,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:40,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:40,280 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:40,281 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) [2019-11-19 22:20:40,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:40,290 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) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:40,321 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:20:40,321 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:20:41,321 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:20:41,325 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:41,325 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:41,325 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:41,325 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:41,325 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:20:41,326 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:41,326 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:41,328 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:41,328 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2019-11-19 22:20:41,328 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:41,328 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:41,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:41,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:41,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:41,436 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:41,441 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) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:41,456 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 [2019-11-19 22:20:41,459 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:41,459 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:41,459 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:41,459 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:41,466 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:41,467 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 22:20:41,475 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:41,485 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 [2019-11-19 22:20:41,487 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:41,487 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:20:41,488 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:41,488 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:41,488 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:41,492 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:20:41,493 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:20:41,498 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:20:41,507 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:20:41,507 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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:41,523 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:20:41,523 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:20:41,524 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:20:41,524 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2019-11-19 22:20:41,530 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:20:41,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:41,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:20:41,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:41,579 WARN L253 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:20:41,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:41,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:20:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:20:41,675 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 [2019-11-19 22:20:41,677 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 4 states. [2019-11-19 22:20:41,815 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. [2019-11-19 22:20:41,816 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 [2019-11-19 22:20:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 22:20:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 24 transitions. [2019-11-19 22:20:41,821 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 3 letters. [2019-11-19 22:20:41,821 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:41,822 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 4 letters. Loop has 3 letters. [2019-11-19 22:20:41,822 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:41,822 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 6 letters. [2019-11-19 22:20:41,823 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:41,824 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 49 transitions. [2019-11-19 22:20:41,828 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-11-19 22:20:41,833 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 11 states and 16 transitions. [2019-11-19 22:20:41,835 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-19 22:20:41,836 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-11-19 22:20:41,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2019-11-19 22:20:41,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:41,838 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-11-19 22:20:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2019-11-19 22:20:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-19 22:20:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-19 22:20:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2019-11-19 22:20:41,869 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2019-11-19 22:20:41,869 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2019-11-19 22:20:41,869 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-19 22:20:41,870 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 15 transitions. [2019-11-19 22:20:41,870 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-11-19 22:20:41,871 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:41,871 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:41,871 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-19 22:20:41,871 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-19 22:20:41,872 INFO L794 eck$LassoCheckResult]: Stem: 90#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 91#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 86#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 87#L17-2 [2019-11-19 22:20:41,872 INFO L796 eck$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 [2019-11-19 22:20:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:41,873 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2019-11-19 22:20:41,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:41,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039679676] [2019-11-19 22:20:41,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:41,888 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:41,889 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2019-11-19 22:20:41,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:41,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932339610] [2019-11-19 22:20:41,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:41,901 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:41,902 INFO L82 PathProgramCache]: Analyzing trace with hash 963530, now seen corresponding path program 2 times [2019-11-19 22:20:41,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:41,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139999180] [2019-11-19 22:20:41,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:41,918 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:41,934 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:41,935 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:41,935 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:41,935 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:41,935 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:20:41,935 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:41,935 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:41,936 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:41,936 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2019-11-19 22:20:41,936 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:41,936 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:41,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:41,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:41,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:42,001 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:42,001 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) [2019-11-19 22:20:42,015 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:42,016 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 [2019-11-19 22:20:42,021 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:42,021 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) [2019-11-19 22:20:42,030 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:42,031 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:42,035 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:42,035 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) [2019-11-19 22:20:42,051 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:42,051 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 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) [2019-11-19 22:20:42,073 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:20:42,073 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:42,206 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:20:42,211 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:42,211 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:42,211 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:42,211 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:42,211 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:20:42,212 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:42,212 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:42,212 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:42,212 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2019-11-19 22:20:42,212 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:42,212 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:42,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:42,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:42,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:42,289 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:42,290 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) [2019-11-19 22:20:42,298 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 [2019-11-19 22:20:42,300 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:42,300 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:42,300 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:42,300 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:42,304 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:42,304 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 [2019-11-19 22:20:42,310 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) [2019-11-19 22:20:42,322 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 [2019-11-19 22:20:42,324 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:42,324 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:42,324 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:42,324 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:42,328 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:42,328 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 [2019-11-19 22:20:42,334 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) [2019-11-19 22:20:42,346 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 [2019-11-19 22:20:42,348 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:42,348 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:20:42,348 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:42,349 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:42,349 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:42,350 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:20:42,351 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 [2019-11-19 22:20:42,354 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:20:42,367 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-19 22:20:42,367 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) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:42,378 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:20:42,379 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:20:42,379 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:20:42,379 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-11-19 22:20:42,382 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-19 22:20:42,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:42,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:20:42,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:42,416 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:20:42,416 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:20:42,417 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 [2019-11-19 22:20:42,417 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 15 transitions. cyclomatic complexity: 8 Second operand 2 states. [2019-11-19 22:20:42,432 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. [2019-11-19 22:20:42,432 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 [2019-11-19 22:20:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-19 22:20:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-11-19 22:20:42,434 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 1 letters. [2019-11-19 22:20:42,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:42,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 1 letters. [2019-11-19 22:20:42,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:42,436 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-19 22:20:42,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:42,436 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 22 transitions. [2019-11-19 22:20:42,437 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:20:42,438 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 13 states and 19 transitions. [2019-11-19 22:20:42,438 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-11-19 22:20:42,439 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-11-19 22:20:42,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-11-19 22:20:42,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:42,439 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-11-19 22:20:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-11-19 22:20:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2019-11-19 22:20:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-19 22:20:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2019-11-19 22:20:42,442 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2019-11-19 22:20:42,442 INFO L591 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2019-11-19 22:20:42,442 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-19 22:20:42,443 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 17 transitions. [2019-11-19 22:20:42,443 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-19 22:20:42,444 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:42,444 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:42,446 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-19 22:20:42,446 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-19 22:20:42,446 INFO L794 eck$LassoCheckResult]: Stem: 146#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 147#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 150#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 153#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 144#L17-3 [2019-11-19 22:20:42,447 INFO L796 eck$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 [2019-11-19 22:20:42,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,447 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 1 times [2019-11-19 22:20:42,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:42,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909933091] [2019-11-19 22:20:42,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,463 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:42,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash 52221, now seen corresponding path program 2 times [2019-11-19 22:20:42,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:42,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937959930] [2019-11-19 22:20:42,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:42,475 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:42,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285994, now seen corresponding path program 1 times [2019-11-19 22:20:42,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:42,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671429986] [2019-11-19 22:20:42,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 22:20:42,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671429986] [2019-11-19 22:20:42,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964360474] [2019-11-19 22:20:42,583 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) [2019-11-19 22:20:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:20:42,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 22:20:42,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:42,642 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 22:20:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 22:20:42,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:20:42,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-19 22:20:42,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61786173] [2019-11-19 22:20:42,750 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:42,750 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:42,751 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:42,751 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:42,751 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:20:42,751 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:42,751 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:42,752 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:42,752 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2019-11-19 22:20:42,752 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:42,752 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:42,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:42,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:42,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:42,878 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:42,880 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) [2019-11-19 22:20:42,885 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:42,886 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) [2019-11-19 22:20:42,910 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:20:42,910 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 [2019-11-19 22:20:47,492 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:20:47,495 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:47,495 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:47,495 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:47,495 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:47,496 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:20:47,496 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:47,496 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:47,496 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:47,496 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2019-11-19 22:20:47,496 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:47,496 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:47,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:47,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:47,520 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:47,588 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:47,589 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) [2019-11-19 22:20:47,599 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:47,601 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:47,601 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:47,601 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:47,601 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:47,604 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:20:47,604 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 22:20:47,611 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) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:47,631 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 [2019-11-19 22:20:47,633 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:20:47,633 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:20:47,633 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:20:47,634 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:20:47,634 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:20:47,636 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:20:47,637 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-19 22:20:47,641 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:20:47,646 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:20:47,647 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) [2019-11-19 22:20:47,660 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:20:47,660 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:20:47,661 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:20:47,661 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-11-19 22:20:47,663 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 [2019-11-19 22:20:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:47,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:20:47,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:20:47,717 WARN L253 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 22:20:47,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:20:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:20:47,760 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 [2019-11-19 22:20:47,761 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-11-19 22:20:47,815 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. [2019-11-19 22:20:47,815 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 [2019-11-19 22:20:47,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 22:20:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2019-11-19 22:20:47,816 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 3 letters. [2019-11-19 22:20:47,817 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:47,817 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 7 letters. Loop has 3 letters. [2019-11-19 22:20:47,817 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:47,817 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 6 letters. [2019-11-19 22:20:47,818 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:20:47,818 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 52 transitions. [2019-11-19 22:20:47,819 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-11-19 22:20:47,820 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 24 states and 35 transitions. [2019-11-19 22:20:47,820 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-11-19 22:20:47,820 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-11-19 22:20:47,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2019-11-19 22:20:47,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:47,821 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2019-11-19 22:20:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2019-11-19 22:20:47,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-19 22:20:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-19 22:20:47,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2019-11-19 22:20:47,825 INFO L711 BuchiCegarLoop]: Abstraction has 22 states and 33 transitions. [2019-11-19 22:20:47,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 22:20:47,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 22:20:47,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-19 22:20:47,829 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand 9 states. [2019-11-19 22:20:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:20:47,994 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2019-11-19 22:20:47,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 22:20:47,995 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2019-11-19 22:20:47,996 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2019-11-19 22:20:47,997 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 26 transitions. [2019-11-19 22:20:47,997 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2019-11-19 22:20:47,997 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-19 22:20:47,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 26 transitions. [2019-11-19 22:20:47,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:20:47,998 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 26 transitions. [2019-11-19 22:20:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 26 transitions. [2019-11-19 22:20:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2019-11-19 22:20:48,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-19 22:20:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-19 22:20:48,001 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-19 22:20:48,001 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-19 22:20:48,001 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-19 22:20:48,001 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2019-11-19 22:20:48,002 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-19 22:20:48,002 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:20:48,002 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:20:48,002 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-19 22:20:48,003 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-19 22:20:48,003 INFO L794 eck$LassoCheckResult]: Stem: 322#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 323#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 326#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 325#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 321#L17-3 [2019-11-19 22:20:48,003 INFO L796 eck$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 [2019-11-19 22:20:48,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:48,003 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 2 times [2019-11-19 22:20:48,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:48,004 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067180705] [2019-11-19 22:20:48,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:48,016 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:48,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:48,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1618930, now seen corresponding path program 1 times [2019-11-19 22:20:48,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:48,017 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514013839] [2019-11-19 22:20:48,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:48,027 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:20:48,028 INFO L82 PathProgramCache]: Analyzing trace with hash 780807225, now seen corresponding path program 2 times [2019-11-19 22:20:48,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:20:48,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053220952] [2019-11-19 22:20:48,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:20:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:20:48,047 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:20:48,116 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:20:48,116 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:20:48,116 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:20:48,116 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:20:48,116 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:20:48,116 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:48,116 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:20:48,117 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:20:48,117 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2019-11-19 22:20:48,117 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:20:48,117 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:20:48,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:48,124 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:48,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:20:48,196 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:20:48,196 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) [2019-11-19 22:20:48,206 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:48,206 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:48,210 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:48,211 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 [2019-11-19 22:20:48,218 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:48,218 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:20:48,221 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:20:48,221 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) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:20:48,230 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:20:48,230 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 [2019-11-19 22:20:48,248 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:20:48,248 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:21:00,267 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-11-19 22:21:00,271 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:21:00,271 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:21:00,271 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:21:00,271 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:21:00,271 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:21:00,271 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:21:00,272 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:21:00,272 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:21:00,272 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2019-11-19 22:21:00,272 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:21:00,272 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:21:00,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:21:00,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:21:00,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:21:00,358 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:21:00,358 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) [2019-11-19 22:21:00,371 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 [2019-11-19 22:21:00,374 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:21:00,374 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:21:00,374 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:21:00,374 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:21:00,375 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:21:00,378 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:21:00,378 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:21:00,383 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:21:00,388 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-19 22:21:00,388 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) [2019-11-19 22:21:00,394 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:21:00,395 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:21:00,395 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:21:00,395 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Exception during sending of exit command (exit): Stream closed [2019-11-19 22:21:00,398 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:21:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:21:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:21:00,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:21:00,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:21:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:21:00,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:21:00,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:21:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-19 22:21:00,487 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 [2019-11-19 22:21:00,487 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-11-19 22:21:00,518 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. [2019-11-19 22:21:00,522 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 [2019-11-19 22:21:00,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-19 22:21:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-11-19 22:21:00,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2019-11-19 22:21:00,523 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:21:00,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 4 letters. [2019-11-19 22:21:00,523 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:21:00,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 8 letters. [2019-11-19 22:21:00,524 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:21:00,524 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 32 transitions. [2019-11-19 22:21:00,525 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-19 22:21:00,526 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 27 transitions. [2019-11-19 22:21:00,526 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2019-11-19 22:21:00,526 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-11-19 22:21:00,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 27 transitions. [2019-11-19 22:21:00,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-19 22:21:00,526 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 27 transitions. [2019-11-19 22:21:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 27 transitions. [2019-11-19 22:21:00,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2019-11-19 22:21:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-19 22:21:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2019-11-19 22:21:00,529 INFO L711 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-19 22:21:00,530 INFO L591 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-19 22:21:00,530 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-19 22:21:00,530 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2019-11-19 22:21:00,531 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-19 22:21:00,531 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-19 22:21:00,531 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-19 22:21:00,532 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-19 22:21:00,532 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-19 22:21:00,532 INFO L794 eck$LassoCheckResult]: Stem: 405#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 406#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 415#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 412#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 411#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 407#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 402#L17-2 [2019-11-19 22:21:00,532 INFO L796 eck$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 [2019-11-19 22:21:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:21:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 3 times [2019-11-19 22:21:00,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:21:00,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920650830] [2019-11-19 22:21:00,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:21:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:21:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:21:00,550 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:21:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:21:00,551 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2019-11-19 22:21:00,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:21:00,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295904142] [2019-11-19 22:21:00,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:21:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:21:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:21:00,557 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:21:00,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:21:00,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285992, now seen corresponding path program 4 times [2019-11-19 22:21:00,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 22:21:00,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834501132] [2019-11-19 22:21:00,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 22:21:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:21:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:21:00,575 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 22:21:00,587 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:21:00,587 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:21:00,588 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:21:00,588 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:21:00,588 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-19 22:21:00,588 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:21:00,588 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:21:00,588 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:21:00,588 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2019-11-19 22:21:00,588 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:21:00,588 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:21:00,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:21:00,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:21:00,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:21:00,633 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:21:00,633 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) [2019-11-19 22:21:00,643 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:21:00,643 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:21:00,648 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:21:00,648 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: [] 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 [2019-11-19 22:21:00,657 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:21:00,658 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:21:00,663 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-19 22:21:00,663 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: [] 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) [2019-11-19 22:21:00,672 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-19 22:21:00,672 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 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 [2019-11-19 22:21:00,681 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-19 22:21:00,681 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-19 22:21:00,786 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-19 22:21:00,787 INFO L210 LassoAnalysis]: Preferences: [2019-11-19 22:21:00,787 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-19 22:21:00,788 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-19 22:21:00,788 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-19 22:21:00,788 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-19 22:21:00,788 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:21:00,788 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-19 22:21:00,788 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-19 22:21:00,788 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2019-11-19 22:21:00,788 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-19 22:21:00,788 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-19 22:21:00,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:21:00,792 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:21:00,796 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-19 22:21:00,837 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-19 22:21:00,837 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 [2019-11-19 22:21:00,842 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 [2019-11-19 22:21:00,843 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:21:00,843 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:21:00,843 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:21:00,843 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:21:00,845 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:21:00,845 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 22:21:00,848 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 [2019-11-19 22:21:00,854 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 [2019-11-19 22:21:00,855 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:21:00,855 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:21:00,855 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:21:00,855 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:21:00,857 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-19 22:21:00,858 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-19 22:21:00,866 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) [2019-11-19 22:21:00,878 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 [2019-11-19 22:21:00,879 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-19 22:21:00,880 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-19 22:21:00,880 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-19 22:21:00,880 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-19 22:21:00,880 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-19 22:21:00,881 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-19 22:21:00,881 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 [2019-11-19 22:21:00,885 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-19 22:21:00,889 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-19 22:21:00,890 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) [2019-11-19 22:21:00,901 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-19 22:21:00,901 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-19 22:21:00,901 INFO L510 LassoAnalysis]: Proved termination. [2019-11-19 22:21:00,901 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-11-19 22:21:00,905 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-19 22:21:00,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:21:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:21:00,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:21:00,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:21:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:21:00,963 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:21:00,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:21:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:21:00,964 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 [2019-11-19 22:21:00,964 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-11-19 22:21:00,976 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. [2019-11-19 22:21:00,976 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 [2019-11-19 22:21:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-19 22:21:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-19 22:21:00,977 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-11-19 22:21:00,977 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:21:00,977 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:21:00,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:21:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:21:00,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:21:00,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:21:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:21:01,000 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:21:01,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:21:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:21:01,002 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 [2019-11-19 22:21:01,002 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-11-19 22:21:01,019 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. [2019-11-19 22:21:01,020 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 [2019-11-19 22:21:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-19 22:21:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-19 22:21:01,021 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-11-19 22:21:01,021 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:21:01,021 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-19 22:21:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:21:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:21:01,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:21:01,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:21:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:21:01,045 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:21:01,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:21:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:21:01,046 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 [2019-11-19 22:21:01,047 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-11-19 22:21:01,064 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. [2019-11-19 22:21:01,066 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 [2019-11-19 22:21:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-19 22:21:01,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-11-19 22:21:01,067 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2019-11-19 22:21:01,067 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:21:01,067 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 1 letters. [2019-11-19 22:21:01,067 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:21:01,068 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-19 22:21:01,068 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-19 22:21:01,068 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 30 transitions. [2019-11-19 22:21:01,069 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-19 22:21:01,069 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 0 states and 0 transitions. [2019-11-19 22:21:01,069 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-19 22:21:01,069 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-19 22:21:01,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-19 22:21:01,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-19 22:21:01,069 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:21:01,070 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:21:01,070 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-19 22:21:01,070 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-19 22:21:01,070 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-19 22:21:01,070 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-19 22:21:01,070 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-19 22:21:01,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.11 10:21:01 BoogieIcfgContainer [2019-11-19 22:21:01,076 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-19 22:21:01,077 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:21:01,077 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:21:01,077 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:21:01,078 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:20:39" (3/4) ... [2019-11-19 22:21:01,081 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-19 22:21:01,082 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:21:01,084 INFO L168 Benchmark]: Toolchain (without parser) took 21983.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.5 MB). Free memory was 961.7 MB in the beginning and 1.0 GB in the end (delta: -52.4 MB). Peak memory consumption was 153.1 MB. Max. memory is 11.5 GB. [2019-11-19 22:21:01,084 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:21:01,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.30 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:21:01,086 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.73 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:21:01,087 INFO L168 Benchmark]: Boogie Preprocessor took 67.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -187.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-19 22:21:01,087 INFO L168 Benchmark]: RCFGBuilder took 203.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-19 22:21:01,088 INFO L168 Benchmark]: BuchiAutomizer took 21413.64 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.0 MB). Peak memory consumption was 170.0 MB. Max. memory is 11.5 GB. [2019-11-19 22:21:01,089 INFO L168 Benchmark]: Witness Printer took 4.92 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. [2019-11-19 22:21:01,093 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 261.30 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 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 27.73 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 67.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -187.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 203.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 21413.64 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 64.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 106.0 MB). Peak memory consumption was 170.0 MB. Max. memory is 11.5 GB. * Witness Printer took 4.92 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 21.3s 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: 32ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 1 LassoNonterminationAnalysisTime: 18.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...