./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loop-lit/gr2006.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/loop-lit/gr2006.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash 76260ed82768318ee6f3ac3cb9cfff5a60080963 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 20:50:34,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:50:34,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:50:34,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:50:34,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:50:34,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:50:34,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:50:34,514 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:50:34,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:50:34,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:50:34,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:50:34,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:50:34,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:50:34,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:50:34,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:50:34,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:50:34,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:50:34,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:50:34,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:50:34,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:50:34,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:50:34,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:50:34,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:50:34,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:50:34,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:50:34,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:50:34,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:50:34,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:50:34,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:50:34,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:50:34,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:50:34,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:50:34,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:50:34,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:50:34,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:50:34,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:50:34,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:50:34,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:50:34,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:50:34,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:50:34,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:50:34,572 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 20:50:34,593 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:50:34,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:50:34,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:50:34,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:50:34,596 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:50:34,596 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 20:50:34,597 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 20:50:34,597 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 20:50:34,597 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 20:50:34,597 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 20:50:34,598 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 20:50:34,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:50:34,599 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 20:50:34,600 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:50:34,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:50:34,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 20:50:34,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:50:34,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 20:50:34,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 20:50:34,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 20:50:34,601 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 20:50:34,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 20:50:34,601 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 20:50:34,602 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:50:34,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 20:50:34,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:50:34,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:50:34,603 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 20:50:34,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:50:34,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:50:34,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:50:34,604 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 20:50:34,605 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 20:50:34,606 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76260ed82768318ee6f3ac3cb9cfff5a60080963 [2019-11-28 20:50:34,896 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:50:34,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:50:34,914 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:50:34,915 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:50:34,916 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:50:34,917 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gr2006.i [2019-11-28 20:50:34,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e165f6f32/9bf9c049428a440aa41c2ab7b8fb6c54/FLAGf5b43ce69 [2019-11-28 20:50:35,423 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:50:35,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i [2019-11-28 20:50:35,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e165f6f32/9bf9c049428a440aa41c2ab7b8fb6c54/FLAGf5b43ce69 [2019-11-28 20:50:35,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e165f6f32/9bf9c049428a440aa41c2ab7b8fb6c54 [2019-11-28 20:50:35,828 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:50:35,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 20:50:35,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:50:35,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:50:35,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:50:35,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:50:35" (1/1) ... [2019-11-28 20:50:35,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43345d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:35, skipping insertion in model container [2019-11-28 20:50:35,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:50:35" (1/1) ... [2019-11-28 20:50:35,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:50:35,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:50:36,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:50:36,079 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:50:36,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:50:36,106 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:50:36,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36 WrapperNode [2019-11-28 20:50:36,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:50:36,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 20:50:36,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 20:50:36,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 20:50:36,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... [2019-11-28 20:50:36,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... [2019-11-28 20:50:36,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 20:50:36,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:50:36,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:50:36,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:50:36,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... [2019-11-28 20:50:36,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... [2019-11-28 20:50:36,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... [2019-11-28 20:50:36,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... [2019-11-28 20:50:36,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... [2019-11-28 20:50:36,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... [2019-11-28 20:50:36,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... [2019-11-28 20:50:36,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:50:36,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:50:36,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:50:36,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:50:36,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:50:36,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:50:36,448 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:50:36,448 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 20:50:36,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:50:36 BoogieIcfgContainer [2019-11-28 20:50:36,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:50:36,452 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 20:50:36,452 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 20:50:36,456 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 20:50:36,457 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:50:36,457 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 08:50:35" (1/3) ... [2019-11-28 20:50:36,459 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5bf97ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:50:36, skipping insertion in model container [2019-11-28 20:50:36,459 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:50:36,459 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:50:36" (2/3) ... [2019-11-28 20:50:36,460 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5bf97ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:50:36, skipping insertion in model container [2019-11-28 20:50:36,460 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:50:36,460 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:50:36" (3/3) ... [2019-11-28 20:50:36,462 INFO L371 chiAutomizerObserver]: Analyzing ICFG gr2006.i [2019-11-28 20:50:36,530 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 20:50:36,530 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 20:50:36,530 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 20:50:36,531 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:50:36,531 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:50:36,531 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 20:50:36,531 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:50:36,531 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 20:50:36,546 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states. [2019-11-28 20:50:36,566 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:50:36,566 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:50:36,566 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:50:36,572 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 20:50:36,572 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 20:50:36,572 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 20:50:36,572 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states. [2019-11-28 20:50:36,574 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:50:36,574 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:50:36,574 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:50:36,574 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 20:50:36,575 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 20:50:36,581 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~post1, main_#t~post2, main_#t~post3, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 7#L14-2true [2019-11-28 20:50:36,581 INFO L796 eck$LassoCheckResult]: Loop: 7#L14-2true assume !false; 3#L15true assume main_~x~0 < 50;main_#t~post1 := main_~y~0;main_~y~0 := 1 + main_#t~post1;havoc main_#t~post1; 10#L15-2true assume !(main_~y~0 < 0);main_#t~post3 := main_~x~0;main_~x~0 := 1 + main_#t~post3;havoc main_#t~post3; 7#L14-2true [2019-11-28 20:50:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:36,587 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-28 20:50:36,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:50:36,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023814626] [2019-11-28 20:50:36,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:50:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:36,691 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:50:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash 39825, now seen corresponding path program 1 times [2019-11-28 20:50:36,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:50:36,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061747343] [2019-11-28 20:50:36,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:50:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:36,712 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:50:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:36,715 INFO L82 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 1 times [2019-11-28 20:50:36,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:50:36,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101039218] [2019-11-28 20:50:36,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:50:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:36,739 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:50:36,853 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:50:36,854 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:50:36,855 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:50:36,855 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:50:36,855 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:50:36,855 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:36,856 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:50:36,856 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:50:36,856 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2019-11-28 20:50:36,856 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:50:36,857 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:50:36,889 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:36,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:36,992 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,004 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,093 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:50:37,094 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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,101 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:50:37,102 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:50:37,132 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:50:37,132 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,143 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:50:37,145 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:50:37,145 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:50:37,146 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:50:37,146 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:50:37,146 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:50:37,146 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,146 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:50:37,147 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:50:37,147 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2019-11-28 20:50:37,147 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:50:37,147 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:50:37,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,179 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,246 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:50:37,254 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:50:37,263 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:50:37,266 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:50:37,266 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:50:37,267 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:50:37,267 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:50:37,267 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:50:37,272 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:50:37,272 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,283 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:50:37,292 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:50:37,293 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:50:37,300 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:50:37,300 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:50:37,301 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:50:37,302 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 99 Supporting invariants [] [2019-11-28 20:50:37,308 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:37,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:50:37,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:37,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:50:37,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:50:37,418 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-28 20:50:37,419 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states. Second operand 4 states. [2019-11-28 20:50:37,501 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 7 states. [2019-11-28 20:50:37,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 20:50:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 20:50:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 34 transitions. [2019-11-28 20:50:37,507 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 34 transitions. Stem has 1 letters. Loop has 3 letters. [2019-11-28 20:50:37,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:37,509 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 34 transitions. Stem has 4 letters. Loop has 3 letters. [2019-11-28 20:50:37,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:37,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 34 transitions. Stem has 1 letters. Loop has 6 letters. [2019-11-28 20:50:37,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:37,511 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 20:50:37,516 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:50:37,520 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 11 states and 14 transitions. [2019-11-28 20:50:37,521 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-11-28 20:50:37,522 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-11-28 20:50:37,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 14 transitions. [2019-11-28 20:50:37,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:50:37,523 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2019-11-28 20:50:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 14 transitions. [2019-11-28 20:50:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-28 20:50:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-28 20:50:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2019-11-28 20:50:37,552 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-28 20:50:37,552 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-28 20:50:37,553 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 20:50:37,553 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2019-11-28 20:50:37,554 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:50:37,554 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:50:37,554 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:50:37,554 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 20:50:37,555 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 20:50:37,555 INFO L794 eck$LassoCheckResult]: Stem: 102#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~post1, main_#t~post2, main_#t~post3, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 103#L14-2 assume !false; 97#L15 [2019-11-28 20:50:37,555 INFO L796 eck$LassoCheckResult]: Loop: 97#L15 assume !(main_~x~0 < 50);main_#t~post2 := main_~y~0;main_~y~0 := main_#t~post2 - 1;havoc main_#t~post2; 98#L15-2 assume !(main_~y~0 < 0);main_#t~post3 := main_~x~0;main_~x~0 := 1 + main_#t~post3;havoc main_#t~post3; 104#L14-2 assume !false; 97#L15 [2019-11-28 20:50:37,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:37,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-28 20:50:37,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:50:37,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692908342] [2019-11-28 20:50:37,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:50:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:37,563 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:50:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:37,564 INFO L82 PathProgramCache]: Analyzing trace with hash 44867, now seen corresponding path program 1 times [2019-11-28 20:50:37,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:50:37,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003564546] [2019-11-28 20:50:37,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:50:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:37,573 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:50:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash 29865658, now seen corresponding path program 1 times [2019-11-28 20:50:37,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:50:37,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032740820] [2019-11-28 20:50:37,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:50:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:50:37,617 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032740820] [2019-11-28 20:50:37,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:50:37,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 20:50:37,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249043027] [2019-11-28 20:50:37,642 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:50:37,642 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:50:37,642 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:50:37,643 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:50:37,643 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:50:37,643 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,643 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:50:37,643 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:50:37,644 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2019-11-28 20:50:37,644 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:50:37,644 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:50:37,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,664 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,733 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:50:37,733 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2019-11-28 20:50:37,740 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:50:37,742 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:50:37,746 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:50:37,746 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post3=0} Honda state: {ULTIMATE.start_main_#t~post3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,754 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:50:37,754 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,768 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:50:37,768 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:50:37,789 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:50:37,789 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=50} Honda state: {ULTIMATE.start_main_~x~0=50} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0=1}, {ULTIMATE.start_main_~x~0=0}, {ULTIMATE.start_main_~x~0=0}] Lambdas: [1, 0, 0] Nus: [1, 0] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,799 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:50:37,799 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:50:37,804 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:50:37,805 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post2=0} Honda state: {ULTIMATE.start_main_#t~post2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2019-11-28 20:50:37,822 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:50:37,823 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 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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,838 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:50:37,838 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:50:37,876 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:50:37,878 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:50:37,878 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:50:37,878 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:50:37,878 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:50:37,879 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:50:37,879 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,879 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:50:37,879 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:50:37,879 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2019-11-28 20:50:37,879 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:50:37,879 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:50:37,883 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:37,965 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:50:37,965 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:50:37,974 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:50:37,976 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:50:37,977 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:50:37,977 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:50:37,977 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:50:37,977 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:50:37,978 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:50:37,979 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:37,981 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:50:37,998 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:50:37,999 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:50:37,999 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:50:38,000 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:50:38,000 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:50:38,000 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:50:38,001 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:50:38,002 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:38,005 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 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 [2019-11-28 20:50:38,019 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:50:38,020 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:50:38,021 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:50:38,021 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:50:38,021 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:50:38,021 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:50:38,022 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:50:38,022 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:50:38,025 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:38,040 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:50:38,042 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:50:38,043 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:50:38,043 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:50:38,043 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:50:38,043 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:50:38,046 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:50:38,047 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:50:38,052 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:50:38,055 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 20:50:38,055 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:50:38,069 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:50:38,069 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:50:38,070 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:50:38,070 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2019-11-28 20:50:38,073 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:38,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:38,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:50:38,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:50:38,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:50:38,159 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-28 20:50:38,159 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 13 transitions. cyclomatic complexity: 5 Second operand 4 states. [2019-11-28 20:50:38,188 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 13 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 23 states and 29 transitions. Complement of second has 7 states. [2019-11-28 20:50:38,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 20:50:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 20:50:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2019-11-28 20:50:38,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 3 letters. [2019-11-28 20:50:38,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:38,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-28 20:50:38,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:38,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-28 20:50:38,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:38,192 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 29 transitions. [2019-11-28 20:50:38,194 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:50:38,194 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 15 states and 19 transitions. [2019-11-28 20:50:38,194 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-11-28 20:50:38,195 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-28 20:50:38,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 19 transitions. [2019-11-28 20:50:38,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:50:38,195 INFO L688 BuchiCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-28 20:50:38,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 19 transitions. [2019-11-28 20:50:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-28 20:50:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 20:50:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-28 20:50:38,198 INFO L711 BuchiCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-28 20:50:38,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:50:38,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 20:50:38,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 20:50:38,203 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 3 states. [2019-11-28 20:50:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:50:38,215 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2019-11-28 20:50:38,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 20:50:38,216 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 14 transitions. [2019-11-28 20:50:38,216 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:50:38,217 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 14 transitions. [2019-11-28 20:50:38,217 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-11-28 20:50:38,217 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-28 20:50:38,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 14 transitions. [2019-11-28 20:50:38,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:50:38,218 INFO L688 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-28 20:50:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 14 transitions. [2019-11-28 20:50:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-11-28 20:50:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 20:50:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-28 20:50:38,220 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-28 20:50:38,220 INFO L591 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-28 20:50:38,220 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 20:50:38,220 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 13 transitions. [2019-11-28 20:50:38,221 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 20:50:38,221 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:50:38,221 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:50:38,222 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2019-11-28 20:50:38,222 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 20:50:38,222 INFO L794 eck$LassoCheckResult]: Stem: 202#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~post1, main_#t~post2, main_#t~post3, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 203#L14-2 assume !false; 200#L15 assume main_~x~0 < 50;main_#t~post1 := main_~y~0;main_~y~0 := 1 + main_#t~post1;havoc main_#t~post1; 201#L15-2 assume !(main_~y~0 < 0);main_#t~post3 := main_~x~0;main_~x~0 := 1 + main_#t~post3;havoc main_#t~post3; 208#L14-2 assume !false; 198#L15 [2019-11-28 20:50:38,222 INFO L796 eck$LassoCheckResult]: Loop: 198#L15 assume !(main_~x~0 < 50);main_#t~post2 := main_~y~0;main_~y~0 := main_#t~post2 - 1;havoc main_#t~post2; 199#L15-2 assume !(main_~y~0 < 0);main_#t~post3 := main_~x~0;main_~x~0 := 1 + main_#t~post3;havoc main_#t~post3; 206#L14-2 assume !false; 198#L15 [2019-11-28 20:50:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash 29863736, now seen corresponding path program 2 times [2019-11-28 20:50:38,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:50:38,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512584070] [2019-11-28 20:50:38,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:50:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:38,233 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:50:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash 44867, now seen corresponding path program 2 times [2019-11-28 20:50:38,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:50:38,234 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072066112] [2019-11-28 20:50:38,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:50:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:50:38,242 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:50:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:38,243 INFO L82 PathProgramCache]: Analyzing trace with hash 612343980, now seen corresponding path program 1 times [2019-11-28 20:50:38,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:50:38,243 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487810005] [2019-11-28 20:50:38,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:50:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:50:38,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487810005] [2019-11-28 20:50:38,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833486726] [2019-11-28 20:50:38,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 20:50:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 20:50:38,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:50:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:50:38,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:50:38,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-28 20:50:38,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462288025] [2019-11-28 20:50:38,352 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:50:38,353 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:50:38,353 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:50:38,353 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:50:38,353 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:50:38,353 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:38,353 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:50:38,354 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:50:38,354 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2019-11-28 20:50:38,354 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:50:38,354 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:50:38,359 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:38,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:38,372 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:38,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:38,428 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:50:38,428 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2019-11-28 20:50:38,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:50:38,443 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:38,448 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:50:38,448 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post2=0} Honda state: {ULTIMATE.start_main_#t~post2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:50:38,465 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:50:38,465 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:50:38,486 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:50:38,486 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:38,538 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:50:38,541 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:50:38,542 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:50:38,542 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:50:38,542 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:50:38,542 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:50:38,542 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:38,542 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:50:38,543 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:50:38,543 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2019-11-28 20:50:38,543 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:50:38,543 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:50:38,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:38,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:38,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:38,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:50:38,620 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:50:38,620 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2019-11-28 20:50:38,643 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:50:38,645 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:50:38,645 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:50:38,645 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:50:38,645 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:50:38,646 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:50:38,647 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:50:38,647 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:38,651 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:50:38,656 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:50:38,657 INFO L444 ModelExtractionUtils]: 0 out of 3 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:50:38,670 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:50:38,671 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:50:38,671 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:50:38,671 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2019-11-28 20:50:38,673 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:50:38,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,699 INFO L264 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:50:38,700 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:50:38,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:50:38,735 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-28 20:50:38,735 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 13 transitions. cyclomatic complexity: 4 Second operand 4 states. [2019-11-28 20:50:38,743 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 13 transitions. cyclomatic complexity: 4. Second operand 4 states. Result 11 states and 13 transitions. Complement of second has 3 states. [2019-11-28 20:50:38,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2019-11-28 20:50:38,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 20:50:38,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-28 20:50:38,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-28 20:50:38,745 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:38,745 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 20:50:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,768 INFO L264 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:50:38,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:50:38,777 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:50:38,821 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-28 20:50:38,821 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 13 transitions. cyclomatic complexity: 4 Second operand 4 states. [2019-11-28 20:50:38,828 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 13 transitions. cyclomatic complexity: 4. Second operand 4 states. Result 11 states and 13 transitions. Complement of second has 3 states. [2019-11-28 20:50:38,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2019-11-28 20:50:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 20:50:38,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-28 20:50:38,831 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-28 20:50:38,831 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:38,831 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 20:50:38,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:50:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:50:38,856 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:50:38,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:50:38,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:50:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:50:38,889 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 3 loop predicates [2019-11-28 20:50:38,890 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 13 transitions. cyclomatic complexity: 4 Second operand 4 states. [2019-11-28 20:50:38,921 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 13 transitions. cyclomatic complexity: 4. Second operand 4 states. Result 18 states and 22 transitions. Complement of second has 6 states. [2019-11-28 20:50:38,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 20:50:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 20:50:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 20:50:38,922 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-28 20:50:38,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:38,923 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 3 letters. [2019-11-28 20:50:38,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:38,923 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 5 letters. Loop has 6 letters. [2019-11-28 20:50:38,924 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:50:38,924 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 22 transitions. [2019-11-28 20:50:38,925 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:50:38,925 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2019-11-28 20:50:38,925 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 20:50:38,925 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 20:50:38,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 20:50:38,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 20:50:38,926 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:50:38,926 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:50:38,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:50:38,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:50:38,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:50:38,927 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2019-11-28 20:50:38,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:50:38,927 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-28 20:50:38,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 20:50:38,928 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-28 20:50:38,928 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:50:38,928 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 20:50:38,928 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 20:50:38,928 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 20:50:38,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 20:50:38,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 20:50:38,929 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:50:38,929 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:50:38,929 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:50:38,929 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 20:50:38,929 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 20:50:38,929 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:50:38,930 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 20:50:38,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 08:50:38 BoogieIcfgContainer [2019-11-28 20:50:38,936 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 20:50:38,937 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:50:38,937 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:50:38,937 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:50:38,938 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:50:36" (3/4) ... [2019-11-28 20:50:38,942 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 20:50:38,942 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:50:38,944 INFO L168 Benchmark]: Toolchain (without parser) took 3114.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 961.7 MB in the beginning and 844.0 MB in the end (delta: 117.7 MB). Peak memory consumption was 265.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:50:38,945 INFO L168 Benchmark]: CDTParser took 0.25 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. [2019-11-28 20:50:38,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.63 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. [2019-11-28 20:50:38,947 INFO L168 Benchmark]: Boogie Procedure Inliner took 96.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -193.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:50:38,947 INFO L168 Benchmark]: Boogie Preprocessor took 21.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:50:38,948 INFO L168 Benchmark]: RCFGBuilder took 225.84 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: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-11-28 20:50:38,949 INFO L168 Benchmark]: BuchiAutomizer took 2484.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 844.0 MB in the end (delta: 280.4 MB). Peak memory consumption was 280.4 MB. Max. memory is 11.5 GB. [2019-11-28 20:50:38,949 INFO L168 Benchmark]: Witness Printer took 4.85 ms. Allocated memory is still 1.2 GB. Free memory is still 844.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:50:38,954 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 276.63 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 96.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -193.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 225.84 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: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2484.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 844.0 MB in the end (delta: 280.4 MB). Peak memory consumption was 280.4 MB. Max. memory is 11.5 GB. * Witness Printer took 4.85 ms. Allocated memory is still 1.2 GB. Free memory is still 844.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -2 * x + 99 and consists of 5 locations. One deterministic module has affine ranking function y and consists of 4 locations. One nondeterministic module has affine ranking function y and consists of 4 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.4s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 1.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 11 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 24 SDtfs, 27 SDslu, 19 SDs, 0 SdLazy, 35 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax100 hnf91 lsp55 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie103 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 46ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 1 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...