./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 30f4e4ab 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 0.1.24-30f4e4a [2019-11-28 03:18:04,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 03:18:04,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 03:18:04,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 03:18:04,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 03:18:04,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 03:18:04,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 03:18:04,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 03:18:04,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 03:18:04,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 03:18:04,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 03:18:04,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 03:18:04,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 03:18:04,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 03:18:04,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 03:18:04,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 03:18:04,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 03:18:04,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 03:18:04,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 03:18:04,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 03:18:04,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 03:18:04,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 03:18:04,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 03:18:04,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 03:18:04,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 03:18:04,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 03:18:04,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 03:18:04,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 03:18:04,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 03:18:04,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 03:18:04,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 03:18:04,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 03:18:04,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 03:18:04,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 03:18:04,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 03:18:04,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 03:18:04,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 03:18:04,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 03:18:04,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 03:18:04,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 03:18:04,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 03:18:04,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 03:18:04,922 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 03:18:04,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 03:18:04,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 03:18:04,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 03:18:04,925 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 03:18:04,926 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 03:18:04,926 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 03:18:04,926 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 03:18:04,927 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 03:18:04,927 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 03:18:04,928 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 03:18:04,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 03:18:04,929 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 03:18:04,929 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 03:18:04,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 03:18:04,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 03:18:04,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 03:18:04,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 03:18:04,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 03:18:04,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 03:18:04,931 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 03:18:04,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 03:18:04,932 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 03:18:04,932 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 03:18:04,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 03:18:04,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 03:18:04,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 03:18:04,934 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 03:18:04,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 03:18:04,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 03:18:04,934 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 03:18:04,937 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 03:18:04,938 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 03:18:05,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 03:18:05,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 03:18:05,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 03:18:05,297 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 03:18:05,299 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 03:18:05,300 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gr2006.i [2019-11-28 03:18:05,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d0f49c0a/bba130ade16d4511bd477ba66d773a0b/FLAG619a70adc [2019-11-28 03:18:05,809 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 03:18:05,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i [2019-11-28 03:18:05,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d0f49c0a/bba130ade16d4511bd477ba66d773a0b/FLAG619a70adc [2019-11-28 03:18:06,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d0f49c0a/bba130ade16d4511bd477ba66d773a0b [2019-11-28 03:18:06,251 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 03:18:06,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 03:18:06,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 03:18:06,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 03:18:06,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 03:18:06,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fda3371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06, skipping insertion in model container [2019-11-28 03:18:06,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 03:18:06,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 03:18:06,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:18:06,466 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 03:18:06,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:18:06,511 INFO L208 MainTranslator]: Completed translation [2019-11-28 03:18:06,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06 WrapperNode [2019-11-28 03:18:06,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 03:18:06,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 03:18:06,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 03:18:06,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 03:18:06,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 03:18:06,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 03:18:06,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 03:18:06,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 03:18:06,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (1/1) ... [2019-11-28 03:18:06,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 03:18:06,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 03:18:06,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 03:18:06,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 03:18:06,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (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 03:18:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 03:18:06,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 03:18:06,891 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 03:18:06,891 INFO L297 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 03:18:06,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:18:06 BoogieIcfgContainer [2019-11-28 03:18:06,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 03:18:06,895 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 03:18:06,895 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 03:18:06,898 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 03:18:06,899 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:18:06,900 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:18:06" (1/3) ... [2019-11-28 03:18:06,901 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6d480edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:18:06, skipping insertion in model container [2019-11-28 03:18:06,902 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:18:06,902 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:18:06" (2/3) ... [2019-11-28 03:18:06,903 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6d480edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:18:06, skipping insertion in model container [2019-11-28 03:18:06,903 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:18:06,903 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:18:06" (3/3) ... [2019-11-28 03:18:06,906 INFO L371 chiAutomizerObserver]: Analyzing ICFG gr2006.i [2019-11-28 03:18:06,967 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 03:18:06,967 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 03:18:06,967 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 03:18:06,967 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 03:18:06,967 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 03:18:06,968 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 03:18:06,968 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 03:18:06,968 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 03:18:06,981 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states. [2019-11-28 03:18:07,003 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 03:18:07,003 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:18:07,004 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:18:07,010 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 03:18:07,011 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 03:18:07,011 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 03:18:07,011 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states. [2019-11-28 03:18:07,012 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 03:18:07,012 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:18:07,013 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:18:07,013 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 03:18:07,013 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 03:18:07,021 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~post1, main_#t~post2, main_#t~post3, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 7#L14-2true [2019-11-28 03:18:07,022 INFO L796 eck$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 03:18:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:07,028 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-28 03:18:07,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:18:07,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403084830] [2019-11-28 03:18:07,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:18:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,127 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:18:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:07,128 INFO L82 PathProgramCache]: Analyzing trace with hash 39825, now seen corresponding path program 1 times [2019-11-28 03:18:07,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:18:07,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939113002] [2019-11-28 03:18:07,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:18:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,156 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:18:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 1 times [2019-11-28 03:18:07,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:18:07,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828733771] [2019-11-28 03:18:07,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:18:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,179 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:18:07,279 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:18:07,280 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:18:07,293 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:18:07,293 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:18:07,293 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:18:07,294 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:07,294 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:18:07,294 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:18:07,295 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2019-11-28 03:18:07,295 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:18:07,295 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:18:07,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:18:07,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:18:07,375 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 03:18:07,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:18:07,468 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:18:07,468 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 03:18:07,476 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:18:07,476 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) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:07,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:18:07,499 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:18:07,510 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:18:07,512 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:18:07,512 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:18:07,512 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:18:07,513 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:18:07,513 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:18:07,513 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:07,513 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:18:07,513 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:18:07,513 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2019-11-28 03:18:07,513 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:18:07,514 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:18:07,516 INFO 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 03:18:07,526 INFO 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 03:18:07,544 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 03:18:07,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:18:07,606 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:18:07,611 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:07,618 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 03:18:07,620 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:18:07,621 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:18:07,621 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:18:07,622 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:18:07,622 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:18:07,625 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:18:07,625 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:18:07,629 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:18:07,638 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:18:07,639 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 03:18:07,649 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:18:07,649 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:07,650 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:18:07,651 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 03:18:07,657 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:18:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:07,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 03:18:07,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:07,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:18:07,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:07,743 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 03:18:07,760 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 03:18:07,761 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states. Second operand 4 states. [2019-11-28 03:18:07,822 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 03:18:07,822 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 03:18:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:18:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 34 transitions. [2019-11-28 03:18:07,827 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 34 transitions. Stem has 1 letters. Loop has 3 letters. [2019-11-28 03:18:07,828 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:07,828 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 34 transitions. Stem has 4 letters. Loop has 3 letters. [2019-11-28 03:18:07,828 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:07,829 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 34 transitions. Stem has 1 letters. Loop has 6 letters. [2019-11-28 03:18:07,829 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:07,830 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 03:18:07,834 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 03:18:07,839 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 11 states and 14 transitions. [2019-11-28 03:18:07,840 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-11-28 03:18:07,840 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-11-28 03:18:07,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 14 transitions. [2019-11-28 03:18:07,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:18:07,841 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 14 transitions. [2019-11-28 03:18:07,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 14 transitions. [2019-11-28 03:18:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-28 03:18:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-28 03:18:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2019-11-28 03:18:07,870 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-28 03:18:07,870 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2019-11-28 03:18:07,870 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 03:18:07,870 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2019-11-28 03:18:07,871 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 03:18:07,871 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:18:07,871 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:18:07,871 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:18:07,872 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 03:18:07,872 INFO L794 eck$LassoCheckResult]: Stem: 102#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~post1, main_#t~post2, main_#t~post3, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 103#L14-2 assume !false; 97#L15 [2019-11-28 03:18:07,872 INFO L796 eck$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 03:18:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-28 03:18:07,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:18:07,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488137059] [2019-11-28 03:18:07,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:18:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,879 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:18:07,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:07,880 INFO L82 PathProgramCache]: Analyzing trace with hash 44867, now seen corresponding path program 1 times [2019-11-28 03:18:07,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:18:07,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848350872] [2019-11-28 03:18:07,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:18:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:07,889 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:18:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:07,890 INFO L82 PathProgramCache]: Analyzing trace with hash 29865658, now seen corresponding path program 1 times [2019-11-28 03:18:07,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:18:07,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120570023] [2019-11-28 03:18:07,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:18:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:07,936 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 03:18:07,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120570023] [2019-11-28 03:18:07,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 03:18:07,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 03:18:07,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953080713] [2019-11-28 03:18:07,964 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:18:07,964 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:18:07,965 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:18:07,965 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:18:07,965 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:18:07,965 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:07,965 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:18:07,966 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:18:07,966 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2019-11-28 03:18:07,966 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:18:07,966 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:18:07,968 INFO 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 03:18:07,973 INFO 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 03:18:07,981 INFO 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 03:18:07,984 INFO 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 03:18:08,031 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:18:08,032 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 03:18:08,039 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:18:08,040 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:18:08,045 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:18:08,045 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 03:18:08,069 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:18:08,069 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 03:18:08,088 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:18:08,088 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:18:08,099 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:18:08,100 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 03:18:08,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:18:08,121 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:18:08,125 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:18:08,125 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 03:18:08,141 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:18:08,141 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 03:18:08,153 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:18:08,153 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:18:08,183 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:18:08,184 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:18:08,184 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:18:08,185 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:18:08,185 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:18:08,185 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:18:08,185 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,185 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:18:08,185 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:18:08,185 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2019-11-28 03:18:08,186 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:18:08,186 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:18:08,187 INFO 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 03:18:08,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:18:08,201 INFO 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 03:18:08,204 INFO 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 03:18:08,253 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:18:08,254 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 03:18:08,259 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 03:18:08,261 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:18:08,261 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:18:08,261 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:18:08,261 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:18:08,261 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:18:08,262 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:18:08,262 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 03:18:08,265 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) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,277 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 03:18:08,279 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:18:08,279 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:18:08,279 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:18:08,280 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:18:08,280 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:18:08,281 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:18:08,281 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:18:08,284 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) [2019-11-28 03:18:08,299 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:18:08,301 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:18:08,301 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:18:08,301 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:18:08,301 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:18:08,301 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:18:08,302 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:18:08,302 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,304 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) [2019-11-28 03:18:08,319 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:18:08,321 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:18:08,321 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:18:08,321 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:18:08,322 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:18:08,322 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:18:08,323 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:18:08,323 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,326 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:18:08,328 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 03:18:08,329 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 03:18:08,341 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:18:08,341 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:18:08,342 INFO L510 LassoAnalysis]: Proved termination. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,342 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 03:18:08,345 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:18:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:08,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 03:18:08,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:08,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:18:08,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:08,411 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 03:18:08,411 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 03:18:08,411 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 13 transitions. cyclomatic complexity: 5 Second operand 4 states. [2019-11-28 03:18:08,440 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 03:18:08,441 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 03:18:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:18:08,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2019-11-28 03:18:08,443 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 3 letters. [2019-11-28 03:18:08,443 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:08,443 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-28 03:18:08,443 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:08,444 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-28 03:18:08,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:08,444 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 29 transitions. [2019-11-28 03:18:08,446 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 03:18:08,449 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 15 states and 19 transitions. [2019-11-28 03:18:08,449 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-11-28 03:18:08,449 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-28 03:18:08,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 19 transitions. [2019-11-28 03:18:08,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:18:08,450 INFO L688 BuchiCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-28 03:18:08,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 19 transitions. [2019-11-28 03:18:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-28 03:18:08,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 03:18:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2019-11-28 03:18:08,455 INFO L711 BuchiCegarLoop]: Abstraction has 15 states and 19 transitions. [2019-11-28 03:18:08,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:18:08,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 03:18:08,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 03:18:08,460 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 3 states. [2019-11-28 03:18:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:18:08,474 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2019-11-28 03:18:08,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 03:18:08,474 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 14 transitions. [2019-11-28 03:18:08,475 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 03:18:08,477 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 14 transitions. [2019-11-28 03:18:08,477 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-11-28 03:18:08,478 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-28 03:18:08,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 14 transitions. [2019-11-28 03:18:08,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:18:08,478 INFO L688 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-28 03:18:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 14 transitions. [2019-11-28 03:18:08,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2019-11-28 03:18:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 03:18:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-28 03:18:08,484 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-28 03:18:08,484 INFO L591 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-28 03:18:08,484 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 03:18:08,485 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 13 transitions. [2019-11-28 03:18:08,485 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-28 03:18:08,487 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:18:08,487 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:18:08,487 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2019-11-28 03:18:08,489 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-28 03:18:08,489 INFO L794 eck$LassoCheckResult]: Stem: 202#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~post1, main_#t~post2, main_#t~post3, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 203#L14-2 assume !false; 200#L15 assume main_~x~0 < 50;main_#t~post1 := main_~y~0;main_~y~0 := 1 + main_#t~post1;havoc main_#t~post1; 201#L15-2 assume !(main_~y~0 < 0);main_#t~post3 := main_~x~0;main_~x~0 := 1 + main_#t~post3;havoc main_#t~post3; 208#L14-2 assume !false; 198#L15 [2019-11-28 03:18:08,489 INFO L796 eck$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 03:18:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:08,490 INFO L82 PathProgramCache]: Analyzing trace with hash 29863736, now seen corresponding path program 2 times [2019-11-28 03:18:08,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:18:08,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482108797] [2019-11-28 03:18:08,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:18:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:08,513 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:18:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:08,517 INFO L82 PathProgramCache]: Analyzing trace with hash 44867, now seen corresponding path program 2 times [2019-11-28 03:18:08,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:18:08,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906396949] [2019-11-28 03:18:08,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:18:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:18:08,528 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:18:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:08,529 INFO L82 PathProgramCache]: Analyzing trace with hash 612343980, now seen corresponding path program 1 times [2019-11-28 03:18:08,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:18:08,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348305241] [2019-11-28 03:18:08,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:18:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:08,566 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 03:18:08,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348305241] [2019-11-28 03:18:08,567 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204393685] [2019-11-28 03:18:08,567 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) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:18:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:08,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-28 03:18:08,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:08,613 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 03:18:08,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:18:08,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-28 03:18:08,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561551174] [2019-11-28 03:18:08,633 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:18:08,633 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:18:08,634 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:18:08,634 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:18:08,634 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:18:08,634 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,634 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:18:08,634 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:18:08,634 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2019-11-28 03:18:08,635 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:18:08,637 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:18:08,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:18:08,640 INFO 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 03:18:08,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:18:08,650 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 03:18:08,697 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:18:08,697 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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,712 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:18:08,713 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:18:08,716 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:18:08,716 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 03:18:08,726 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:18:08,726 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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,736 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:18:08,737 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:18:08,770 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:18:08,772 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:18:08,772 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:18:08,772 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:18:08,772 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:18:08,772 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:18:08,772 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,772 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:18:08,773 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:18:08,773 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2019-11-28 03:18:08,773 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:18:08,773 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:18:08,774 INFO 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 03:18:08,782 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:18:08,786 INFO 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 03:18:08,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:18:08,830 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:18:08,830 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 03:18:08,837 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 03:18:08,838 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:18:08,838 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:18:08,839 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:18:08,839 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:18:08,839 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:18:08,840 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:18:08,840 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 03:18:08,844 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:18:08,849 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:18:08,849 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) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:18:08,854 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:18:08,854 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:18:08,855 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:18:08,855 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 03:18:08,857 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:18:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:08,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 03:18:08,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:08,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:18:08,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:08,917 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 03:18:08,918 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 03:18:08,918 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 13 transitions. cyclomatic complexity: 4 Second operand 4 states. [2019-11-28 03:18:08,925 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 03:18:08,927 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 03:18:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:18:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-28 03:18:08,927 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-28 03:18:08,928 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:08,928 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:18:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:08,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 03:18:08,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:08,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:18:08,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:08,977 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 03:18:08,978 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 03:18:08,978 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 13 transitions. cyclomatic complexity: 4 Second operand 4 states. [2019-11-28 03:18:08,984 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 03:18:08,986 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 03:18:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:18:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-28 03:18:08,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-28 03:18:08,987 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:08,987 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:18:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:18:09,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:09,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 03:18:09,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:18:09,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:18:09,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:18:09,043 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 03:18:09,044 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 03:18:09,044 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 13 transitions. cyclomatic complexity: 4 Second operand 4 states. [2019-11-28 03:18:09,080 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 03:18:09,081 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 03:18:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:18:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 03:18:09,082 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-28 03:18:09,082 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:09,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 3 letters. [2019-11-28 03:18:09,083 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:09,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 5 letters. Loop has 6 letters. [2019-11-28 03:18:09,084 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:18:09,084 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 22 transitions. [2019-11-28 03:18:09,085 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:18:09,085 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2019-11-28 03:18:09,086 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 03:18:09,086 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 03:18:09,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 03:18:09,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 03:18:09,086 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:18:09,086 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:18:09,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:18:09,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 03:18:09,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 03:18:09,089 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2019-11-28 03:18:09,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:18:09,090 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-28 03:18:09,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 03:18:09,090 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-28 03:18:09,090 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:18:09,091 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 03:18:09,091 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 03:18:09,091 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 03:18:09,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 03:18:09,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 03:18:09,093 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:18:09,093 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:18:09,093 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:18:09,093 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 03:18:09,094 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 03:18:09,094 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:18:09,094 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 03:18:09,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:18:09 BoogieIcfgContainer [2019-11-28 03:18:09,101 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 03:18:09,102 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 03:18:09,102 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 03:18:09,102 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 03:18:09,104 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:18:06" (3/4) ... [2019-11-28 03:18:09,110 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 03:18:09,110 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 03:18:09,114 INFO L168 Benchmark]: Toolchain (without parser) took 2859.80 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.0 MB). Free memory was 959.0 MB in the beginning and 794.8 MB in the end (delta: 164.3 MB). Peak memory consumption was 250.3 MB. Max. memory is 11.5 GB. [2019-11-28 03:18:09,116 INFO L168 Benchmark]: CDTParser took 0.26 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 03:18:09,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.13 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 948.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:18:09,118 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.43 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:18:09,119 INFO L168 Benchmark]: Boogie Preprocessor took 79.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.0 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -133.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 03:18:09,120 INFO L168 Benchmark]: RCFGBuilder took 255.38 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. [2019-11-28 03:18:09,125 INFO L168 Benchmark]: BuchiAutomizer took 2206.34 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 794.8 MB in the end (delta: 261.5 MB). Peak memory consumption was 261.5 MB. Max. memory is 11.5 GB. [2019-11-28 03:18:09,125 INFO L168 Benchmark]: Witness Printer took 8.73 ms. Allocated memory is still 1.1 GB. Free memory is still 794.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:18:09,133 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 261.13 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 948.3 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 43.43 ms. Allocated memory is still 1.0 GB. Free memory is still 948.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 79.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 86.0 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -133.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 255.38 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2206.34 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 794.8 MB in the end (delta: 261.5 MB). Peak memory consumption was 261.5 MB. Max. memory is 11.5 GB. * Witness Printer took 8.73 ms. Allocated memory is still 1.1 GB. Free memory is still 794.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 2.1s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 1.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. 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: 38ms 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...