./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.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-lit/CookSeeZuleger-TACAS2013-Fig8a.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 df3ddc93bc6339292c9158119f1fdb949bb8842d ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:29:55,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:29:55,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:29:55,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:29:55,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:29:55,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:29:55,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:29:55,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:29:55,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:29:55,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:29:55,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:29:55,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:29:55,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:29:55,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:29:55,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:29:55,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:29:55,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:29:55,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:29:55,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:29:55,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:29:55,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:29:55,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:29:55,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:29:55,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:29:55,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:29:55,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:29:55,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:29:55,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:29:55,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:29:55,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:29:55,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:29:55,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:29:55,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:29:55,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:29:55,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:29:55,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:29:55,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:29:55,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:29:55,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:29:55,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:29:55,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:29:55,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 20:29:55,932 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:29:55,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:29:55,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:29:55,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:29:55,941 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:29:55,941 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 20:29:55,942 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 20:29:55,942 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 20:29:55,942 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 20:29:55,943 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 20:29:55,943 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 20:29:55,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:29:55,943 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:29:55,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:29:55,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:29:55,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 20:29:55,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 20:29:55,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 20:29:55,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 20:29:55,946 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 20:29:55,947 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:29:55,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 20:29:55,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:29:55,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:29:55,948 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 20:29:55,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:29:55,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:29:55,949 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:29:55,949 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 20:29:55,950 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 20:29:55,951 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 -> df3ddc93bc6339292c9158119f1fdb949bb8842d [2019-11-28 20:29:56,323 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:29:56,342 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:29:56,346 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:29:56,347 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:29:56,348 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:29:56,349 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2019-11-28 20:29:56,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9aeaf4b/a1f571dd53384762bb2346cbcbdb07c2/FLAGbb2ac48d6 [2019-11-28 20:29:56,880 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:29:56,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2019-11-28 20:29:56,888 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9aeaf4b/a1f571dd53384762bb2346cbcbdb07c2/FLAGbb2ac48d6 [2019-11-28 20:29:57,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9aeaf4b/a1f571dd53384762bb2346cbcbdb07c2 [2019-11-28 20:29:57,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:29:57,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 20:29:57,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:29:57,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:29:57,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:29:57,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69923c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57, skipping insertion in model container [2019-11-28 20:29:57,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:29:57,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:29:57,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:29:57,585 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:29:57,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:29:57,623 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:29:57,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57 WrapperNode [2019-11-28 20:29:57,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:29:57,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 20:29:57,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 20:29:57,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 20:29:57,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,737 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 20:29:57,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:29:57,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:29:57,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:29:57,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (1/1) ... [2019-11-28 20:29:57,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:29:57,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:29:57,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:29:57,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:29:57,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (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 20:29:57,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:29:57,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:29:57,951 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:29:57,952 INFO L287 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-28 20:29:57,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:29:57 BoogieIcfgContainer [2019-11-28 20:29:57,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:29:57,954 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 20:29:57,954 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 20:29:57,958 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 20:29:57,958 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:29:57,959 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 08:29:57" (1/3) ... [2019-11-28 20:29:57,960 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1ea4131f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:29:57, skipping insertion in model container [2019-11-28 20:29:57,960 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:29:57,960 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:29:57" (2/3) ... [2019-11-28 20:29:57,960 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1ea4131f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:29:57, skipping insertion in model container [2019-11-28 20:29:57,961 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:29:57,961 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:29:57" (3/3) ... [2019-11-28 20:29:57,962 INFO L371 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a.c [2019-11-28 20:29:58,007 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 20:29:58,008 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 20:29:58,008 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 20:29:58,008 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:29:58,008 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:29:58,008 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 20:29:58,009 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:29:58,009 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 20:29:58,023 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-28 20:29:58,043 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:58,044 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:29:58,044 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:29:58,051 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 20:29:58,051 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 20:29:58,051 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 20:29:58,051 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-28 20:29:58,052 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:58,052 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:29:58,053 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:29:58,053 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 20:29:58,053 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 20:29:58,060 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 3#L17-2true [2019-11-28 20:29:58,060 INFO L796 eck$LassoCheckResult]: Loop: 3#L17-2true assume !!(0 != main_~x~0); 5#L17true assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 3#L17-2true [2019-11-28 20:29:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:58,067 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-28 20:29:58,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:58,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378045039] [2019-11-28 20:29:58,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,158 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-11-28 20:29:58,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:58,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020083418] [2019-11-28 20:29:58,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,172 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:58,174 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-28 20:29:58,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:58,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001768289] [2019-11-28 20:29:58,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,185 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:58,294 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:58,294 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:58,295 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:58,295 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:58,295 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:29:58,296 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:58,296 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:58,296 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:58,297 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2019-11-28 20:29:58,297 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:58,297 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:58,328 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 20:29:58,338 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 20:29:58,346 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 20:29:58,423 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:58,424 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 20:29:58,430 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:58,430 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:58,440 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:58,441 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: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:58,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:58,454 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:58,459 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:58,459 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 20:29:58,470 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:58,470 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 20:29:58,483 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:29:58,483 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:58,496 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:29:58,499 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:58,499 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:58,499 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:58,499 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:58,499 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:29:58,500 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:58,500 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:58,500 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:58,500 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2019-11-28 20:29:58,500 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:58,500 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:58,503 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 20:29:58,512 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 20:29:58,518 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 20:29:58,598 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:58,605 INFO L489 LassoAnalysis]: Using template 'affine'. 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 20:29:58,612 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 20:29:58,614 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:58,615 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:58,615 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:58,615 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:58,621 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:29:58,621 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:29:58,631 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:58,648 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 20:29:58,649 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:58,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:58,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:58,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:58,654 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:29:58,654 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:29:58,661 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 20:29:58,678 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 20:29:58,680 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:58,681 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:58,681 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:58,681 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:58,682 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:58,683 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:29:58,683 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:29:58,686 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:29:58,691 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:29:58,691 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:58,700 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:29:58,701 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:29:58,701 INFO L510 LassoAnalysis]: Proved termination. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:58,702 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2019-11-28 20:29:58,707 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 20:29:58,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:58,761 WARN L262 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:29:58,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:58,773 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:29:58,775 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:58,778 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 20:29:58,797 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-11-28 20:29:58,799 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2019-11-28 20:29:58,868 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 23 states and 30 transitions. Complement of second has 6 states. [2019-11-28 20:29:58,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 20:29:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:29:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-28 20:29:58,874 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2019-11-28 20:29:58,876 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:58,876 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-28 20:29:58,877 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:58,877 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2019-11-28 20:29:58,877 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:58,878 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2019-11-28 20:29:58,885 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:58,891 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2019-11-28 20:29:58,893 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-11-28 20:29:58,893 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-28 20:29:58,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2019-11-28 20:29:58,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:29:58,895 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-28 20:29:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2019-11-28 20:29:58,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-28 20:29:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 20:29:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-11-28 20:29:58,927 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-28 20:29:58,927 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-28 20:29:58,927 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 20:29:58,928 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2019-11-28 20:29:58,929 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:58,929 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:29:58,930 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:29:58,930 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-28 20:29:58,930 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 20:29:58,931 INFO L794 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 69#L17-2 assume !!(0 != main_~x~0); 67#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 63#L17-2 [2019-11-28 20:29:58,931 INFO L796 eck$LassoCheckResult]: Loop: 63#L17-2 assume !!(0 != main_~x~0); 64#L17 assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 63#L17-2 [2019-11-28 20:29:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:58,932 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-28 20:29:58,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:58,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581010905] [2019-11-28 20:29:58,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,952 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-11-28 20:29:58,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:58,954 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360643] [2019-11-28 20:29:58,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:58,968 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:58,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:58,969 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2019-11-28 20:29:58,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:58,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801403107] [2019-11-28 20:29:58,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:29:59,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801403107] [2019-11-28 20:29:59,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699809866] [2019-11-28 20:29:59,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 20:29:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:59,058 INFO L264 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:29:59,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:29:59,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 20:29:59,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-28 20:29:59,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720335083] [2019-11-28 20:29:59,109 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:59,110 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:59,110 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:59,110 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:59,110 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:29:59,110 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,113 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:59,113 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:59,113 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2019-11-28 20:29:59,113 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:59,113 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:59,115 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 20:29:59,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:59,134 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 20:29:59,197 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:59,197 INFO L404 LassoAnalysis]: Checking for nontermination... 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 20:29:59,205 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:59,205 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,213 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:59,213 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 12 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,229 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:59,229 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:59,234 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:59,235 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,251 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:59,251 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 20:29:59,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:29:59,267 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:29:59,280 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:29:59,282 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:59,282 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:59,282 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:59,283 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:59,283 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:29:59,283 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,283 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:59,283 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:59,283 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2019-11-28 20:29:59,283 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:59,284 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:59,285 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 20:29:59,293 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 20:29:59,298 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 20:29:59,346 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:59,346 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:59,357 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 20:29:59,363 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:59,363 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:59,364 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:59,364 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:59,367 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:29:59,367 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:29:59,377 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 15 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:59,399 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 20:29:59,401 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:59,401 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:59,402 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:59,402 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:59,405 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:29:59,406 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,412 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,422 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 20:29:59,424 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:29:59,424 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:29:59,425 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:29:59,425 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:29:59,425 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:29:59,426 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:29:59,427 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:29:59,429 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:29:59,433 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:29:59,433 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:29:59,442 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:29:59,442 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:29:59,443 INFO L510 LassoAnalysis]: Proved termination. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,443 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2019-11-28 20:29:59,445 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 20:29:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:59,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:29:59,472 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:29:59,477 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:29:59,478 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:29:59,478 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 20:29:59,479 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-11-28 20:29:59,479 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2019-11-28 20:29:59,509 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 11 states and 16 transitions. Complement of second has 5 states. [2019-11-28 20:29:59,510 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 20:29:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:29:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2019-11-28 20:29:59,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-28 20:29:59,513 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:59,513 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2019-11-28 20:29:59,513 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:59,514 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2019-11-28 20:29:59,514 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:29:59,514 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2019-11-28 20:29:59,516 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:59,517 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2019-11-28 20:29:59,518 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-11-28 20:29:59,518 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-28 20:29:59,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2019-11-28 20:29:59,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:29:59,519 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-11-28 20:29:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2019-11-28 20:29:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-28 20:29:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 20:29:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2019-11-28 20:29:59,525 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-11-28 20:29:59,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:29:59,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:29:59,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:29:59,530 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 4 states. [2019-11-28 20:29:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:29:59,576 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2019-11-28 20:29:59,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 20:29:59,578 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2019-11-28 20:29:59,579 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:59,580 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2019-11-28 20:29:59,580 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-28 20:29:59,580 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-28 20:29:59,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2019-11-28 20:29:59,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:29:59,580 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-28 20:29:59,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2019-11-28 20:29:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2019-11-28 20:29:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 20:29:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2019-11-28 20:29:59,583 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-11-28 20:29:59,583 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-11-28 20:29:59,583 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 20:29:59,584 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2019-11-28 20:29:59,584 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:29:59,584 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:29:59,584 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:29:59,585 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 20:29:59,585 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 20:29:59,585 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 158#L17-2 assume !!(0 != main_~x~0); 154#L17 [2019-11-28 20:29:59,586 INFO L796 eck$LassoCheckResult]: Loop: 154#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 153#L17-2 assume !!(0 != main_~x~0); 154#L17 [2019-11-28 20:29:59,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:59,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-28 20:29:59,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:59,587 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990222142] [2019-11-28 20:29:59,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:59,593 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:59,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2019-11-28 20:29:59,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:59,594 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514555893] [2019-11-28 20:29:59,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:59,601 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:29:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2019-11-28 20:29:59,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:29:59,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308252839] [2019-11-28 20:29:59,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:29:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:29:59,612 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:29:59,649 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:59,650 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:59,650 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:59,650 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:59,650 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:29:59,650 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,651 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:59,651 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:59,651 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2019-11-28 20:29:59,651 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:59,652 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:59,656 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 20:29:59,664 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:29:59,684 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 20:29:59,775 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:29:59,777 INFO L404 LassoAnalysis]: Checking for nontermination... 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 20:29:59,784 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:59,784 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,790 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:29:59,791 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 20:29:59,812 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:29:59,812 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 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 20:29:59,844 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:29:59,845 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,946 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:29:59,948 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:29:59,949 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:29:59,949 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:29:59,949 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:29:59,949 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:29:59,949 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:29:59,949 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:29:59,949 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:29:59,949 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2019-11-28 20:29:59,950 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:29:59,950 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:29:59,952 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 20:29:59,959 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 20:29:59,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:00,060 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:30:00,061 INFO L489 LassoAnalysis]: Using template 'affine'. 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 20:30:00,077 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:30:00,079 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:30:00,079 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:30:00,079 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:30:00,079 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:30:00,088 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:30:00,089 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,097 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,118 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:30:00,120 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:30:00,121 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:30:00,121 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:30:00,121 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-28 20:30:00,121 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:30:00,123 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-11-28 20:30:00,124 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:30:00,133 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:30:00,137 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:30:00,138 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,142 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:30:00,142 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:30:00,142 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:30:00,142 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2019-11-28 20:30:00,146 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 20:30:00,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:00,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:30:00,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:00,174 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:30:00,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:30:00,190 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 20:30:00,190 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 3 states. [2019-11-28 20:30:00,202 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 11 states and 13 transitions. Complement of second has 5 states. [2019-11-28 20:30:00,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 20:30:00,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:30:00,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-28 20:30:00,203 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2019-11-28 20:30:00,204 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:00,204 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 20:30:00,204 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:00,204 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 20:30:00,204 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:00,205 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2019-11-28 20:30:00,205 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:30:00,206 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2019-11-28 20:30:00,206 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-11-28 20:30:00,206 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2019-11-28 20:30:00,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2019-11-28 20:30:00,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:30:00,207 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-28 20:30:00,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2019-11-28 20:30:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2019-11-28 20:30:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 20:30:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2019-11-28 20:30:00,208 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-28 20:30:00,208 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-28 20:30:00,208 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 20:30:00,209 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2019-11-28 20:30:00,209 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 20:30:00,209 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:30:00,209 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:30:00,210 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2019-11-28 20:30:00,210 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 20:30:00,210 INFO L794 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 203#L17-2 assume !!(0 != main_~x~0); 204#L17 assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 205#L17-2 assume !!(0 != main_~x~0); 206#L17 [2019-11-28 20:30:00,210 INFO L796 eck$LassoCheckResult]: Loop: 206#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 208#L17-2 assume !!(0 != main_~x~0); 206#L17 [2019-11-28 20:30:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:00,211 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2019-11-28 20:30:00,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:00,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315378917] [2019-11-28 20:30:00,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:00,228 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:00,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2019-11-28 20:30:00,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:00,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361818069] [2019-11-28 20:30:00,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:30:00,245 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:30:00,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:00,249 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2019-11-28 20:30:00,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:30:00,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040911934] [2019-11-28 20:30:00,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:30:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:30:00,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040911934] [2019-11-28 20:30:00,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:30:00,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:30:00,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241030559] [2019-11-28 20:30:00,328 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:30:00,328 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:30:00,328 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:30:00,328 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:30:00,328 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:30:00,328 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,329 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:30:00,329 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:30:00,329 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2019-11-28 20:30:00,329 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:30:00,329 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:30:00,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:00,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:00,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:00,431 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:30:00,431 INFO L404 LassoAnalysis]: Checking for nontermination... 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 20:30:00,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:30:00,440 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,445 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:30:00,445 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:00,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:30:00,481 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:00,509 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:30:00,509 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,580 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:30:00,582 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:30:00,582 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:30:00,583 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:30:00,583 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:30:00,583 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:30:00,583 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,583 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:30:00,583 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:30:00,583 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2019-11-28 20:30:00,583 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:30:00,583 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:30:00,585 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:00,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:00,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:30:00,661 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:30:00,661 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,670 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:30:00,671 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:30:00,672 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:30:00,672 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:30:00,672 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:30:00,680 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 20:30:00,680 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 20:30:00,686 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:00,697 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 20:30:00,700 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:30:00,700 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:30:00,700 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:30:00,700 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-28 20:30:00,701 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:30:00,702 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-11-28 20:30:00,703 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,707 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:30:00,711 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:30:00,711 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:30:00,718 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:30:00,718 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:30:00,718 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:30:00,718 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2019-11-28 20:30:00,721 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:30:00,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:00,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:30:00,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:00,787 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:30:00,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:30:00,809 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 20:30:00,809 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-28 20:30:00,814 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2019-11-28 20:30:00,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2019-11-28 20:30:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:30:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-28 20:30:00,815 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 20:30:00,815 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:00,815 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 20:30:00,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:00,831 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:30:00,831 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:00,840 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:30:00,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:30:00,859 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 20:30:00,859 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-28 20:30:00,865 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2019-11-28 20:30:00,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2019-11-28 20:30:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:30:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-28 20:30:00,866 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 20:30:00,866 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:00,866 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 20:30:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:30:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:00,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 20:30:00,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:30:00,887 WARN L262 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:30:00,887 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:30:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:30:00,905 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 20:30:00,905 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-28 20:30:00,917 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 8 states and 9 transitions. Complement of second has 4 states. [2019-11-28 20:30:00,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-28 20:30:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 20:30:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-11-28 20:30:00,921 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 20:30:00,922 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:00,922 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-28 20:30:00,922 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:00,923 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2019-11-28 20:30:00,923 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:30:00,924 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2019-11-28 20:30:00,924 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:30:00,925 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2019-11-28 20:30:00,925 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 20:30:00,925 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 20:30:00,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 20:30:00,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 20:30:00,925 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:30:00,925 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:30:00,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:30:00,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 20:30:00,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 20:30:00,926 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2019-11-28 20:30:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:30:00,926 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-28 20:30:00,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 20:30:00,926 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-28 20:30:00,927 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:30:00,927 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 20:30:00,927 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 20:30:00,927 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 20:30:00,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 20:30:00,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 20:30:00,927 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:30:00,927 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:30:00,927 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 20:30:00,928 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 20:30:00,928 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 20:30:00,928 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 20:30:00,928 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 20:30:00,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 08:30:00 BoogieIcfgContainer [2019-11-28 20:30:00,935 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 20:30:00,935 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:30:00,935 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:30:00,936 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:30:00,936 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:29:57" (3/4) ... [2019-11-28 20:30:00,940 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 20:30:00,940 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:30:00,943 INFO L168 Benchmark]: Toolchain (without parser) took 3648.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 208.1 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -166.4 MB). Peak memory consumption was 41.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:30:00,943 INFO L168 Benchmark]: CDTParser took 0.27 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 20:30:00,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.19 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 20:30:00,945 INFO L168 Benchmark]: Boogie Procedure Inliner took 111.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -167.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:30:00,946 INFO L168 Benchmark]: Boogie Preprocessor took 22.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:30:00,946 INFO L168 Benchmark]: RCFGBuilder took 193.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:30:00,947 INFO L168 Benchmark]: BuchiAutomizer took 2980.67 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 86.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -30.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:30:00,948 INFO L168 Benchmark]: Witness Printer took 4.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:30:00,952 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 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 326.19 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 111.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 122.2 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -167.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.48 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 193.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2980.67 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 86.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -30.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 11.5 GB. * Witness Printer took 4.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x and consists of 4 locations. One deterministic module has affine ranking function x and consists of 3 locations. One deterministic module has affine ranking function -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * x + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.9s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 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 [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 20 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax200 hnf98 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf94 smp100 dnf132 smp89 tf110 neg96 sie112 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: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...