./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 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/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 0.1.24-30f4e4a [2019-11-28 02:57:25,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 02:57:25,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 02:57:25,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 02:57:25,946 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 02:57:25,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 02:57:25,949 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 02:57:25,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 02:57:25,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 02:57:25,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 02:57:25,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 02:57:25,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 02:57:25,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 02:57:25,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 02:57:25,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 02:57:25,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 02:57:25,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 02:57:25,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 02:57:25,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 02:57:25,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 02:57:25,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 02:57:25,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 02:57:25,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 02:57:25,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 02:57:25,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 02:57:25,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 02:57:25,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 02:57:25,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 02:57:25,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 02:57:25,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 02:57:25,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 02:57:25,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 02:57:25,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 02:57:25,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 02:57:25,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 02:57:25,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 02:57:25,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 02:57:25,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 02:57:25,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 02:57:25,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 02:57:25,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 02:57:25,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 02:57:26,002 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 02:57:26,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 02:57:26,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 02:57:26,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 02:57:26,005 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 02:57:26,005 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 02:57:26,005 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 02:57:26,006 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 02:57:26,006 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 02:57:26,006 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 02:57:26,007 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 02:57:26,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 02:57:26,008 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 02:57:26,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 02:57:26,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 02:57:26,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 02:57:26,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 02:57:26,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 02:57:26,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 02:57:26,009 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 02:57:26,010 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 02:57:26,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 02:57:26,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 02:57:26,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 02:57:26,011 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 02:57:26,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 02:57:26,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 02:57:26,011 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 02:57:26,013 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 02:57:26,013 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 02:57:26,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 02:57:26,360 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 02:57:26,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 02:57:26,366 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 02:57:26,367 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 02:57:26,367 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2019-11-28 02:57:26,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a80e2cea/d1af44bd79914be8af3fc8efba2bbd30/FLAG0cfee1544 [2019-11-28 02:57:26,877 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 02:57:26,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2019-11-28 02:57:26,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a80e2cea/d1af44bd79914be8af3fc8efba2bbd30/FLAG0cfee1544 [2019-11-28 02:57:27,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a80e2cea/d1af44bd79914be8af3fc8efba2bbd30 [2019-11-28 02:57:27,311 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 02:57:27,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 02:57:27,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 02:57:27,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 02:57:27,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 02:57:27,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1db81b3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27, skipping insertion in model container [2019-11-28 02:57:27,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 02:57:27,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 02:57:27,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:57:27,566 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 02:57:27,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 02:57:27,599 INFO L208 MainTranslator]: Completed translation [2019-11-28 02:57:27,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27 WrapperNode [2019-11-28 02:57:27,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 02:57:27,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 02:57:27,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 02:57:27,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 02:57:27,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 02:57:27,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 02:57:27,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 02:57:27,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 02:57:27,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,711 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,711 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (1/1) ... [2019-11-28 02:57:27,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 02:57:27,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 02:57:27,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 02:57:27,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 02:57:27,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (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 02:57:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 02:57:27,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 02:57:27,913 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 02:57:27,914 INFO L297 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-28 02:57:27,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:27 BoogieIcfgContainer [2019-11-28 02:57:27,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 02:57:27,916 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 02:57:27,916 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 02:57:27,919 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 02:57:27,920 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:57:27,920 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 02:57:27" (1/3) ... [2019-11-28 02:57:27,921 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5ca7d4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:57:27, skipping insertion in model container [2019-11-28 02:57:27,921 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:57:27,921 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:27" (2/3) ... [2019-11-28 02:57:27,921 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5ca7d4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:57:27, skipping insertion in model container [2019-11-28 02:57:27,921 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 02:57:27,922 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:27" (3/3) ... [2019-11-28 02:57:27,923 INFO L371 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a.c [2019-11-28 02:57:27,968 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 02:57:27,969 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 02:57:27,969 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 02:57:27,969 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 02:57:27,969 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 02:57:27,969 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 02:57:27,969 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 02:57:27,970 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 02:57:27,983 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-28 02:57:28,003 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 02:57:28,003 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:57:28,003 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:57:28,009 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 02:57:28,009 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 02:57:28,009 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 02:57:28,009 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-28 02:57:28,010 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 02:57:28,010 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:57:28,010 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:57:28,011 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-28 02:57:28,011 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 02:57:28,018 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 3#L17-2true [2019-11-28 02:57:28,019 INFO L796 eck$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 02:57:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-28 02:57:28,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:28,032 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163233456] [2019-11-28 02:57:28,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,118 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:28,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-11-28 02:57:28,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:28,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330495771] [2019-11-28 02:57:28,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,133 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:28,135 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-28 02:57:28,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:28,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846628834] [2019-11-28 02:57:28,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,146 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:28,222 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:57:28,223 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:57:28,224 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:57:28,224 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:57:28,224 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:57:28,225 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:28,225 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:57:28,226 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:57:28,226 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2019-11-28 02:57:28,226 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:57:28,227 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:57:28,261 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 02:57:28,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:57:28,279 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 02:57:28,369 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:57:28,370 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 02:57:28,377 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:28,377 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:57:28,388 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:57:28,389 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:28,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:28,397 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:57:28,411 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:57:28,411 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) [2019-11-28 02:57:28,424 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:28,425 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 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 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 02:57:28,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:57:28,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:57:28,451 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:57:28,453 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:57:28,453 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:57:28,453 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:57:28,454 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:57:28,454 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:57:28,454 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:28,454 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:57:28,454 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:57:28,454 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2019-11-28 02:57:28,454 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:57:28,455 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:57:28,457 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 02:57:28,471 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 02:57:28,475 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 02:57:28,541 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:57:28,546 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) [2019-11-28 02:57:28,556 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 02:57:28,559 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:28,559 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:28,559 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:57:28,560 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:28,566 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 02:57:28,569 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 02:57:28,578 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 02:57:28,592 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 02:57:28,594 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:28,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:28,595 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:57:28,595 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:57:28,601 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 02:57:28,602 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 02:57:28,611 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:28,623 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 02:57:28,626 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:28,627 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:57:28,627 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:28,627 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:57:28,627 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:57:28,630 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:57:28,630 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:57:28,634 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:57:28,640 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 02:57:28,640 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) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:28,646 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:57:28,646 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:57:28,646 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:57:28,649 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 02:57:28,654 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:57:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:28,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:28,701 WARN L253 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 02:57:28,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:28,713 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:57:28,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:28,718 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 02:57:28,737 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 02:57:28,739 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2019-11-28 02:57:28,808 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 02:57:28,810 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 02:57:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 02:57:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-28 02:57:28,816 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2019-11-28 02:57:28,818 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:28,818 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-28 02:57:28,819 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:28,819 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2019-11-28 02:57:28,819 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:28,820 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2019-11-28 02:57:28,826 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 02:57:28,832 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2019-11-28 02:57:28,834 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-11-28 02:57:28,835 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-28 02:57:28,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2019-11-28 02:57:28,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:57:28,836 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-28 02:57:28,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2019-11-28 02:57:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-28 02:57:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 02:57:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-11-28 02:57:28,871 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-28 02:57:28,871 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-28 02:57:28,872 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 02:57:28,872 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2019-11-28 02:57:28,874 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 02:57:28,874 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:57:28,874 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:57:28,875 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-28 02:57:28,875 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 02:57:28,876 INFO L794 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 69#L17-2 assume !!(0 != main_~x~0); 67#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 63#L17-2 [2019-11-28 02:57:28,876 INFO L796 eck$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 02:57:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-28 02:57:28,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:28,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859907463] [2019-11-28 02:57:28,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,898 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-11-28 02:57:28,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:28,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624256957] [2019-11-28 02:57:28,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:28,915 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:28,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:28,916 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2019-11-28 02:57:28,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:28,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925678621] [2019-11-28 02:57:28,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:29,000 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 02:57:29,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925678621] [2019-11-28 02:57:29,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777604197] [2019-11-28 02:57:29,003 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) [2019-11-28 02:57:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:29,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:57:29,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 02:57:29,068 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 02:57:29,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 02:57:29,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-28 02:57:29,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235585483] [2019-11-28 02:57:29,096 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:57:29,097 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:57:29,097 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:57:29,097 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:57:29,097 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:57:29,097 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,097 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:57:29,098 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:57:29,098 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2019-11-28 02:57:29,098 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:57:29,098 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:57:29,103 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 02:57:29,112 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 02:57:29,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:57:29,167 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:57:29,167 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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,176 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:29,176 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:57:29,183 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:57:29,183 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: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] 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 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 02:57:29,197 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:29,198 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:57:29,206 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:57:29,206 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 02:57:29,227 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:29,227 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 02:57:29,246 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:57:29,246 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:57:29,256 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:57:29,258 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:57:29,258 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:57:29,259 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:57:29,259 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:57:29,259 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:57:29,259 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,259 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:57:29,259 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:57:29,260 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2019-11-28 02:57:29,260 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:57:29,260 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:57:29,262 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 02:57:29,267 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 02:57:29,272 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 02:57:29,323 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:57:29,324 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 02:57:29,334 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 02:57:29,336 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:29,337 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:29,337 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:57:29,337 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:57:29,346 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 02:57:29,349 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,357 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:57:29,369 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 02:57:29,372 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:29,372 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:29,372 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:57:29,372 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:57:29,381 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,384 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-28 02:57:29,395 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 02:57:29,414 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 02:57:29,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:29,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:57:29,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:29,416 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:57:29,417 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:57:29,418 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 02:57:29,419 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,422 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:57:29,426 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 02:57:29,426 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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,434 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:57:29,434 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:57:29,434 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:57:29,434 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 02:57:29,437 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:57:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:29,463 INFO L255 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 02:57:29,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:29,471 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:57:29,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:29,472 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 02:57:29,474 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 02:57:29,474 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2019-11-28 02:57:29,491 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 02:57:29,492 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 02:57:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 02:57:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2019-11-28 02:57:29,494 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-28 02:57:29,494 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:29,495 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2019-11-28 02:57:29,495 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:29,495 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2019-11-28 02:57:29,495 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:29,495 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2019-11-28 02:57:29,497 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 02:57:29,499 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2019-11-28 02:57:29,500 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-11-28 02:57:29,500 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-28 02:57:29,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2019-11-28 02:57:29,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:57:29,501 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-11-28 02:57:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2019-11-28 02:57:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-28 02:57:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 02:57:29,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2019-11-28 02:57:29,504 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-11-28 02:57:29,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:57:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 02:57:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 02:57:29,511 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 4 states. [2019-11-28 02:57:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:57:29,546 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2019-11-28 02:57:29,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 02:57:29,546 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2019-11-28 02:57:29,547 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 02:57:29,548 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2019-11-28 02:57:29,548 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-28 02:57:29,548 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-28 02:57:29,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2019-11-28 02:57:29,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:57:29,550 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-28 02:57:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2019-11-28 02:57:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2019-11-28 02:57:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 02:57:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2019-11-28 02:57:29,551 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-11-28 02:57:29,551 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-11-28 02:57:29,552 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 02:57:29,552 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2019-11-28 02:57:29,552 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 02:57:29,552 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:57:29,553 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:57:29,553 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 02:57:29,553 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 02:57:29,553 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 158#L17-2 assume !!(0 != main_~x~0); 154#L17 [2019-11-28 02:57:29,553 INFO L796 eck$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 02:57:29,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:29,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-28 02:57:29,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:29,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360312694] [2019-11-28 02:57:29,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:29,560 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2019-11-28 02:57:29,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:29,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991471733] [2019-11-28 02:57:29,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:29,568 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:29,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:29,568 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2019-11-28 02:57:29,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:29,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835215986] [2019-11-28 02:57:29,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:29,577 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:29,620 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:57:29,620 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:57:29,621 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:57:29,621 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:57:29,621 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:57:29,621 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,621 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:57:29,622 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:57:29,622 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2019-11-28 02:57:29,622 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:57:29,622 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:57:29,626 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 02:57:29,630 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 02:57:29,652 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 02:57:29,740 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:57:29,740 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 02:57:29,756 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:29,757 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 02:57:29,762 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:57:29,762 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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,774 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:29,774 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 02:57:29,807 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:57:29,807 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 02:57:29,919 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:57:29,921 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:57:29,922 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:57:29,922 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:57:29,922 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:57:29,922 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:57:29,922 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:29,922 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:57:29,922 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:57:29,923 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2019-11-28 02:57:29,923 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:57:29,923 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:57:29,926 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 02:57:29,932 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 02:57:29,945 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 02:57:30,034 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:57:30,034 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 02:57:30,051 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 02:57:30,053 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:30,053 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:30,053 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:57:30,053 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:57:30,061 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 02:57:30,065 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 02:57:30,072 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) [2019-11-28 02:57:30,091 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 02:57:30,093 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:30,093 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:57:30,094 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:30,094 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-28 02:57:30,094 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:30,098 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-11-28 02:57:30,098 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 02:57:30,110 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:57:30,113 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 02:57:30,113 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) [2019-11-28 02:57:30,123 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:57:30,123 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:57:30,123 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:57:30,123 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 02:57:30,127 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:30,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 02:57:30,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:30,170 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:57:30,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:30,190 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 02:57:30,190 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 02:57:30,191 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 3 states. [2019-11-28 02:57:30,204 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 02:57:30,205 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 02:57:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 02:57:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-28 02:57:30,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2019-11-28 02:57:30,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:30,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 02:57:30,206 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:30,207 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 02:57:30,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:30,207 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2019-11-28 02:57:30,208 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 02:57:30,208 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2019-11-28 02:57:30,208 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-11-28 02:57:30,208 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2019-11-28 02:57:30,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2019-11-28 02:57:30,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 02:57:30,209 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-28 02:57:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2019-11-28 02:57:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2019-11-28 02:57:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 02:57:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2019-11-28 02:57:30,210 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-28 02:57:30,211 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-28 02:57:30,211 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 02:57:30,211 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2019-11-28 02:57:30,211 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-28 02:57:30,212 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 02:57:30,212 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 02:57:30,212 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2019-11-28 02:57:30,212 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-28 02:57:30,212 INFO L794 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 203#L17-2 assume !!(0 != main_~x~0); 204#L17 assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 205#L17-2 assume !!(0 != main_~x~0); 206#L17 [2019-11-28 02:57:30,213 INFO L796 eck$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 02:57:30,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:30,213 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2019-11-28 02:57:30,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:30,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827661063] [2019-11-28 02:57:30,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:30,222 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2019-11-28 02:57:30,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:30,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548621314] [2019-11-28 02:57:30,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 02:57:30,230 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 02:57:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:30,231 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2019-11-28 02:57:30,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 02:57:30,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242176104] [2019-11-28 02:57:30,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 02:57:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:30,285 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 02:57:30,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242176104] [2019-11-28 02:57:30,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 02:57:30,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 02:57:30,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146048613] [2019-11-28 02:57:30,304 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:57:30,304 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:57:30,304 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:57:30,305 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:57:30,305 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 02:57:30,305 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:30,305 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:57:30,305 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:57:30,305 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2019-11-28 02:57:30,305 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:57:30,306 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:57:30,308 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 02:57:30,311 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 02:57:30,320 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 02:57:30,411 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:57:30,411 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 02:57:30,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:30,418 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 02:57:30,423 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 02:57:30,423 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) [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 02:57:30,460 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 02:57:30,460 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] 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 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:30,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 02:57:30,480 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 02:57:30,549 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 02:57:30,551 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 02:57:30,551 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 02:57:30,551 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 02:57:30,552 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 02:57:30,552 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 02:57:30,552 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:30,552 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 02:57:30,552 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 02:57:30,552 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2019-11-28 02:57:30,552 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 02:57:30,552 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 02:57:30,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:57:30,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 02:57:30,564 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 02:57:30,652 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 02:57:30,652 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) [2019-11-28 02:57:30,658 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 02:57:30,660 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:30,660 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:30,660 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 02:57:30,660 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:57:30,663 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-28 02:57:30,663 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:30,667 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 02:57:30,675 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 02:57:30,677 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 02:57:30,677 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 02:57:30,677 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 02:57:30,677 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-28 02:57:30,678 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 02:57:30,679 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-11-28 02:57:30,679 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 02:57:30,683 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 02:57:30,687 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 02:57:30,687 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 02:57:30,692 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 02:57:30,692 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 02:57:30,693 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 02:57:30,693 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 02:57:30,697 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 02:57:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:30,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 02:57:30,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:30,749 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:57:30,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:30,784 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 02:57:30,785 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 02:57:30,785 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-28 02:57:30,795 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 02:57:30,796 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 02:57:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 02:57:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-28 02:57:30,797 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 02:57:30,798 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:30,798 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:57:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:30,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 02:57:30,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:30,857 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:57:30,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:30,891 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 02:57:30,892 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 02:57:30,892 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-28 02:57:30,903 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 02:57:30,904 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 02:57:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 02:57:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-28 02:57:30,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 02:57:30,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:30,905 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 02:57:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 02:57:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:30,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-28 02:57:30,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 02:57:30,942 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 02:57:30,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 02:57:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 02:57:30,965 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 02:57:30,965 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-28 02:57:30,982 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 02:57:30,983 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 02:57:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-28 02:57:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-11-28 02:57:30,984 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-28 02:57:30,984 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:30,984 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-28 02:57:30,984 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:30,985 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2019-11-28 02:57:30,985 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 02:57:30,985 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2019-11-28 02:57:30,985 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:57:30,986 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2019-11-28 02:57:30,986 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 02:57:30,986 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 02:57:30,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 02:57:30,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 02:57:30,987 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:57:30,987 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:57:30,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 02:57:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 02:57:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 02:57:30,987 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2019-11-28 02:57:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 02:57:30,988 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-28 02:57:30,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 02:57:30,988 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-28 02:57:30,988 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:57:30,988 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 02:57:30,989 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 02:57:30,989 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 02:57:30,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 02:57:30,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 02:57:30,989 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:57:30,989 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:57:30,989 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 02:57:30,989 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 02:57:30,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 02:57:30,990 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 02:57:30,990 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 02:57:30,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 02:57:30 BoogieIcfgContainer [2019-11-28 02:57:30,995 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 02:57:30,996 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 02:57:30,996 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 02:57:30,996 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 02:57:30,997 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:27" (3/4) ... [2019-11-28 02:57:31,000 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 02:57:31,000 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 02:57:31,003 INFO L168 Benchmark]: Toolchain (without parser) took 3689.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 216.5 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -173.2 MB). Peak memory consumption was 43.4 MB. Max. memory is 11.5 GB. [2019-11-28 02:57:31,003 INFO L168 Benchmark]: CDTParser took 0.33 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 02:57:31,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.15 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 02:57:31,004 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.34 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 02:57:31,005 INFO L168 Benchmark]: Boogie Preprocessor took 79.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -179.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-28 02:57:31,006 INFO L168 Benchmark]: RCFGBuilder took 194.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-11-28 02:57:31,007 INFO L168 Benchmark]: BuchiAutomizer took 3079.76 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 81.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -23.4 MB). Peak memory consumption was 57.9 MB. Max. memory is 11.5 GB. [2019-11-28 02:57:31,007 INFO L168 Benchmark]: Witness Printer took 4.70 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 02:57:31,011 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 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 287.15 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 39.34 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 79.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -179.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 194.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3079.76 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 81.3 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -23.4 MB). Peak memory consumption was 57.9 MB. Max. memory is 11.5 GB. * Witness Printer took 4.70 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 3.0s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 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: 30ms 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...