./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 054e86c0b11592f66f6efc3e0f84c6f8bee49b59 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 20:29:18,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:29:18,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:29:18,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:29:18,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:29:18,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:29:18,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:29:18,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:29:18,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:29:18,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:29:18,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:29:18,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:29:18,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:29:18,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:29:18,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:29:18,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:29:18,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:29:18,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:29:18,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:29:18,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:29:18,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:29:18,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:29:18,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:29:18,912 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:29:18,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:29:18,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:29:18,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:29:18,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:29:18,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:29:18,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:29:18,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:29:18,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:29:18,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:29:18,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:29:18,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:29:18,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:29:18,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:29:18,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:29:18,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:29:18,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:29:18,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:29:18,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 20:29:18,952 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:29:18,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:29:18,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:29:18,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:29:18,956 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:29:18,957 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 20:29:18,957 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 20:29:18,957 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 20:29:18,957 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 20:29:18,958 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 20:29:18,959 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 20:29:18,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:29:18,959 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:29:18,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:29:18,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:29:18,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 20:29:18,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 20:29:18,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 20:29:18,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 20:29:18,961 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 20:29:18,961 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:29:18,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 20:29:18,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:29:18,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:29:18,963 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 20:29:18,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:29:18,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:29:18,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:29:18,964 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 20:29:18,965 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 20:29:18,965 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 054e86c0b11592f66f6efc3e0f84c6f8bee49b59 [2019-11-28 20:29:19,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:29:19,317 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:29:19,322 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:29:19,324 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:29:19,325 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:29:19,326 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c [2019-11-28 20:29:19,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702bf6890/cd84de34bbb54a12a0818982a493fd6d/FLAGf79565748 [2019-11-28 20:29:19,821 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:29:19,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c [2019-11-28 20:29:19,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702bf6890/cd84de34bbb54a12a0818982a493fd6d/FLAGf79565748 [2019-11-28 20:29:20,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/702bf6890/cd84de34bbb54a12a0818982a493fd6d [2019-11-28 20:29:20,229 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:29:20,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 20:29:20,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:29:20,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:29:20,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:29:20,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f61f9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20, skipping insertion in model container [2019-11-28 20:29:20,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:29:20,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:29:20,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:29:20,462 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:29:20,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:29:20,497 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:29:20,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20 WrapperNode [2019-11-28 20:29:20,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:29:20,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 20:29:20,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 20:29:20,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 20:29:20,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 20:29:20,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:29:20,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:29:20,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:29:20,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,648 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... [2019-11-28 20:29:20,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:29:20,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:29:20,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:29:20,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:29:20,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:20,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:29:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:29:20,869 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:29:20,869 INFO L287 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-28 20:29:20,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:29:20 BoogieIcfgContainer [2019-11-28 20:29:20,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:29:20,871 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 20:29:20,871 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 20:29:20,876 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 20:29:20,876 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:29:20,877 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 08:29:20" (1/3) ... [2019-11-28 20:29:20,878 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3b43e947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:29:20, skipping insertion in model container [2019-11-28 20:29:20,878 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:29:20,879 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:20" (2/3) ... [2019-11-28 20:29:20,879 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3b43e947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:29:20, skipping insertion in model container [2019-11-28 20:29:20,879 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:29:20,880 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:29:20" (3/3) ... [2019-11-28 20:29:20,881 INFO L371 chiAutomizerObserver]: Analyzing ICFG Nyala-2lex-2.c [2019-11-28 20:29:20,928 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 20:29:20,928 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 20:29:20,928 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 20:29:20,928 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:29:20,928 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:29:20,929 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 20:29:20,929 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:29:20,929 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 20:29:20,942 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-28 20:29:20,961 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:20,961 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:29:20,961 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:29:20,968 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 20:29:20,968 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 20:29:20,969 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 20:29:20,969 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-28 20:29:20,970 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:20,970 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:29:20,970 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:29:20,970 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 20:29:20,970 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 20:29:20,977 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 8#L21-2true [2019-11-28 20:29:20,977 INFO L796 eck$LassoCheckResult]: Loop: 8#L21-2true assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 4#L21true assume main_~y~0 < 0;main_~x~0 := main_~x~0 - 1;main_~y~0 := main_#t~nondet2;havoc main_#t~nondet2; 8#L21-2true [2019-11-28 20:29:20,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:20,983 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-28 20:29:20,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:20,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429960785] [2019-11-28 20:29:20,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:21,090 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:21,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-11-28 20:29:21,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:21,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834058492] [2019-11-28 20:29:21,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:21,111 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-28 20:29:21,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:21,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669491871] [2019-11-28 20:29:21,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:21,137 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:21,290 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2019-11-28 20:29:21,420 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:21,421 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:21,421 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:21,421 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:21,421 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:29:21,422 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,422 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:21,422 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:21,422 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration1_Loop [2019-11-28 20:29:21,423 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:21,423 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:21,450 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:21,465 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:21,480 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:21,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:21,624 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:21,625 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,647 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:21,648 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:21,658 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:21,659 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:21,676 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:21,676 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,682 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:21,682 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 20:29:21,695 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:21,695 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:21,702 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:21,702 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~y~0=0, ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_~y~0=0, ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,708 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:21,708 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,719 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:29:21,719 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:21,728 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:29:21,730 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:21,730 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:21,731 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:21,731 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:21,731 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:29:21,731 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,732 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:21,732 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:21,732 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration1_Loop [2019-11-28 20:29:21,732 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:21,732 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:21,735 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:21,743 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:21,749 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:21,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:21,862 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:21,868 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:21,875 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:29:21,878 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:21,879 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:21,879 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:21,880 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:21,886 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:29:21,886 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,894 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:21,909 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:29:21,911 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:21,912 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:21,912 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:21,912 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:21,917 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:29:21,917 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,925 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Exception during sending of exit command (exit): Stream closed No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:21,955 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:29:21,958 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:21,958 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:29:21,960 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:21,960 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:21,960 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:21,964 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:29:21,965 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,968 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:21,981 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:29:21,982 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:21,983 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:29:21,983 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:21,983 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:21,983 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:21,985 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:29:21,985 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:29:21,988 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:29:21,992 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:29:21,992 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:22,002 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:29:22,002 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:29:22,002 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:29:22,003 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,018 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 20:29:22,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:22,082 INFO L264 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:29:22,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:22,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:29:22,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:29:22,133 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-28 20:29:22,135 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2019-11-28 20:29:22,198 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 28 states and 35 transitions. Complement of second has 7 states. [2019-11-28 20:29:22,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 20:29:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:29:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2019-11-28 20:29:22,204 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 1 letters. Loop has 2 letters. [2019-11-28 20:29:22,205 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:22,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-28 20:29:22,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:22,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 1 letters. Loop has 4 letters. [2019-11-28 20:29:22,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:22,208 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 35 transitions. [2019-11-28 20:29:22,211 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:22,216 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 8 states and 11 transitions. [2019-11-28 20:29:22,217 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-11-28 20:29:22,218 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-28 20:29:22,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2019-11-28 20:29:22,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:29:22,220 INFO L688 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-11-28 20:29:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2019-11-28 20:29:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-11-28 20:29:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 20:29:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-11-28 20:29:22,251 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-28 20:29:22,251 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-28 20:29:22,252 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 20:29:22,252 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2019-11-28 20:29:22,253 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:22,253 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:29:22,253 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:29:22,254 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 20:29:22,254 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 20:29:22,254 INFO L794 eck$LassoCheckResult]: Stem: 76#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 77#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 71#L21 [2019-11-28 20:29:22,255 INFO L796 eck$LassoCheckResult]: Loop: 71#L21 assume !(main_~y~0 < 0); 72#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 71#L21 [2019-11-28 20:29:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:22,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-28 20:29:22,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:22,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891358682] [2019-11-28 20:29:22,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,275 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:22,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2019-11-28 20:29:22,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:22,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912495770] [2019-11-28 20:29:22,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,285 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:22,286 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 1 times [2019-11-28 20:29:22,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:22,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637063196] [2019-11-28 20:29:22,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,299 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:22,333 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:22,333 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:22,333 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:22,333 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:22,334 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:29:22,334 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,334 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:22,334 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:22,335 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration2_Loop [2019-11-28 20:29:22,335 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:22,335 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:22,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:22,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:22,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:22,350 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 20:29:22,421 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:22,422 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:22,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:22,440 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,446 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:22,446 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:22,457 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:22,457 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,462 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:22,462 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,474 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:22,474 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:22,478 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:22,478 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=0} Honda state: {ULTIMATE.start_main_~x~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,494 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:22,494 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:22,513 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:29:22,514 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,524 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:29:22,527 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:22,527 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:22,527 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:22,527 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:22,527 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:29:22,528 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,528 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:22,528 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:22,528 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration2_Loop [2019-11-28 20:29:22,528 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:22,528 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:22,534 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:22,546 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:22,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:22,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:22,623 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:22,623 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:22,633 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:29:22,635 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:22,635 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:22,635 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:22,636 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:22,643 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:29:22,643 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,649 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,669 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:29:22,671 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:22,671 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:22,671 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:22,672 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:22,680 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:29:22,681 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:29:22,687 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:22,703 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:29:22,706 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:22,706 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:29:22,706 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:22,706 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:22,707 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:22,710 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:29:22,710 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,712 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:22,730 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:29:22,733 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:22,733 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:29:22,734 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:22,734 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:22,734 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:22,737 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:29:22,737 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,741 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:29:22,745 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:29:22,745 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:22,769 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:29:22,769 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:29:22,769 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:29:22,769 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] [2019-11-28 20:29:22,772 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:22,801 INFO L264 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:29:22,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:22,812 WARN L262 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:29:22,813 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:29:22,833 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-28 20:29:22,833 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2019-11-28 20:29:22,856 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 14 states and 19 transitions. Complement of second has 5 states. [2019-11-28 20:29:22,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 20:29:22,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:29:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2019-11-28 20:29:22,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 2 letters. Loop has 2 letters. [2019-11-28 20:29:22,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:22,860 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 20:29:22,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:22,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 20:29:22,861 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:22,861 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 19 transitions. [2019-11-28 20:29:22,862 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:22,864 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 9 states and 12 transitions. [2019-11-28 20:29:22,864 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-11-28 20:29:22,865 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2019-11-28 20:29:22,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2019-11-28 20:29:22,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:29:22,865 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2019-11-28 20:29:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2019-11-28 20:29:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 7. [2019-11-28 20:29:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 20:29:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2019-11-28 20:29:22,869 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2019-11-28 20:29:22,869 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2019-11-28 20:29:22,869 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 20:29:22,869 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2019-11-28 20:29:22,870 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:22,870 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:29:22,871 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:29:22,872 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2019-11-28 20:29:22,872 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 20:29:22,872 INFO L794 eck$LassoCheckResult]: Stem: 130#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 131#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 127#L21 assume main_~y~0 < 0;main_~x~0 := main_~x~0 - 1;main_~y~0 := main_#t~nondet2;havoc main_#t~nondet2; 128#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 125#L21 [2019-11-28 20:29:22,872 INFO L796 eck$LassoCheckResult]: Loop: 125#L21 assume !(main_~y~0 < 0); 126#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 125#L21 [2019-11-28 20:29:22,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:22,873 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2019-11-28 20:29:22,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:22,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406718445] [2019-11-28 20:29:22,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,911 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:22,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:22,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2019-11-28 20:29:22,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:22,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064566240] [2019-11-28 20:29:22,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,932 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:22,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:22,934 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 1 times [2019-11-28 20:29:22,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:22,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795349549] [2019-11-28 20:29:22,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:22,969 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:23,004 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:23,004 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:23,004 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:23,005 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:23,005 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:29:23,005 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:23,005 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:23,005 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:23,005 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration3_Loop [2019-11-28 20:29:23,005 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:23,006 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:23,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:23,017 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:23,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:23,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:23,077 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:23,077 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:23,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:23,091 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:23,107 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:29:23,107 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:23,120 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:23,122 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:23,122 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:23,122 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:23,122 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:23,122 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:29:23,122 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:23,123 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:23,123 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:23,123 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration3_Loop [2019-11-28 20:29:23,123 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:23,123 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:23,124 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:23,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:23,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:23,139 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:23,198 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:23,198 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:23,206 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:29:23,208 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:23,208 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:29:23,209 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:23,209 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:23,209 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:23,211 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:29:23,211 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:23,215 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:29:23,218 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:29:23,218 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:23,224 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:29:23,225 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:29:23,225 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:29:23,225 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] [2019-11-28 20:29:23,236 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:23,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:23,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:29:23,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:23,281 WARN L262 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:29:23,281 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:29:23,295 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-28 20:29:23,296 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 3 states. [2019-11-28 20:29:23,312 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 10 states and 13 transitions. Complement of second has 5 states. [2019-11-28 20:29:23,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 20:29:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:29:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2019-11-28 20:29:23,315 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 20:29:23,315 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:23,316 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 20:29:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:23,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:29:23,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:23,353 WARN L262 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:29:23,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:29:23,367 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2019-11-28 20:29:23,368 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 3 states. [2019-11-28 20:29:23,386 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 10 states and 13 transitions. Complement of second has 5 states. [2019-11-28 20:29:23,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 20:29:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:29:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2019-11-28 20:29:23,388 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 20:29:23,388 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:23,388 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 20:29:23,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:23,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:29:23,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:23,422 WARN L262 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:29:23,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:29:23,436 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 2 loop predicates [2019-11-28 20:29:23,436 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 3 states. [2019-11-28 20:29:23,453 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 10 states and 13 transitions. Complement of second has 4 states. [2019-11-28 20:29:23,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 20:29:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:29:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2019-11-28 20:29:23,456 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 20:29:23,456 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:23,456 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-28 20:29:23,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:23,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 4 letters. [2019-11-28 20:29:23,458 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:23,458 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 13 transitions. [2019-11-28 20:29:23,460 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:29:23,460 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 0 states and 0 transitions. [2019-11-28 20:29:23,460 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 20:29:23,460 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 20:29:23,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 20:29:23,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 20:29:23,461 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:29:23,461 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:29:23,461 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:29:23,461 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 20:29:23,461 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 20:29:23,461 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:29:23,461 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 20:29:23,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 08:29:23 BoogieIcfgContainer [2019-11-28 20:29:23,470 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 20:29:23,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:29:23,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:29:23,472 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:29:23,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:29:20" (3/4) ... [2019-11-28 20:29:23,477 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 20:29:23,477 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:29:23,483 INFO L168 Benchmark]: Toolchain (without parser) took 3248.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 961.7 MB in the beginning and 840.0 MB in the end (delta: 121.7 MB). Peak memory consumption was 286.8 MB. Max. memory is 11.5 GB. [2019-11-28 20:29:23,484 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:29:23,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.29 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:29:23,488 INFO L168 Benchmark]: Boogie Procedure Inliner took 130.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 951.0 MB in the beginning and 1.2 GB in the end (delta: -210.7 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:29:23,489 INFO L168 Benchmark]: Boogie Preprocessor took 19.41 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:29:23,491 INFO L168 Benchmark]: RCFGBuilder took 220.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-28 20:29:23,495 INFO L168 Benchmark]: BuchiAutomizer took 2599.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 846.8 MB in the end (delta: 294.3 MB). Peak memory consumption was 294.3 MB. Max. memory is 11.5 GB. [2019-11-28 20:29:23,497 INFO L168 Benchmark]: Witness Printer took 6.06 ms. Allocated memory is still 1.2 GB. Free memory was 846.8 MB in the beginning and 840.0 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:29:23,509 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 266.29 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 130.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 951.0 MB in the beginning and 1.2 GB in the end (delta: -210.7 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.41 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 220.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2599.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 846.8 MB in the end (delta: 294.3 MB). Peak memory consumption was 294.3 MB. Max. memory is 11.5 GB. * Witness Printer took 6.06 ms. Allocated memory is still 1.2 GB. Free memory was 846.8 MB in the beginning and 840.0 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. 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 3 terminating modules (0 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 2 * x + 1 and consists of 5 locations. One deterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.5s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 1.9s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 18 SDtfs, 18 SDslu, 10 SDs, 0 SdLazy, 36 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax178 hnf97 lsp38 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf93 smp100 dnf100 smp100 tf113 neg100 sie101 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 24ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 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...