./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/DivMinus2_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/DivMinus2_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer --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 4113f10404cd50c48db8fb998633f502f8a0b01a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 00:28:26,663 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 00:28:26,664 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 00:28:26,673 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 00:28:26,673 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 00:28:26,674 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 00:28:26,674 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 00:28:26,676 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 00:28:26,677 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 00:28:26,677 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 00:28:26,678 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 00:28:26,678 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 00:28:26,679 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 00:28:26,679 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 00:28:26,680 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 00:28:26,680 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 00:28:26,681 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 00:28:26,682 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 00:28:26,683 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 00:28:26,684 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 00:28:26,685 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 00:28:26,686 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 00:28:26,687 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 00:28:26,687 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 00:28:26,688 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 00:28:26,688 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 00:28:26,689 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 00:28:26,689 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 00:28:26,690 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 00:28:26,690 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 00:28:26,691 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 00:28:26,691 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 00:28:26,691 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 00:28:26,691 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 00:28:26,692 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 00:28:26,693 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 00:28:26,693 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-23 00:28:26,702 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 00:28:26,702 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 00:28:26,703 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 00:28:26,703 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 00:28:26,703 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 00:28:26,703 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 00:28:26,703 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 00:28:26,704 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 00:28:26,704 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 00:28:26,704 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 00:28:26,704 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 00:28:26,704 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 00:28:26,704 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 00:28:26,704 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 00:28:26,704 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 00:28:26,705 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 00:28:26,705 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 00:28:26,705 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 00:28:26,705 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 00:28:26,705 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 00:28:26,705 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 00:28:26,705 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 00:28:26,706 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 00:28:26,706 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 00:28:26,706 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 00:28:26,706 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 00:28:26,706 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 00:28:26,706 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 00:28:26,707 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 00:28:26,707 INFO L133 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer 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 -> 4113f10404cd50c48db8fb998633f502f8a0b01a [2018-11-23 00:28:26,730 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 00:28:26,739 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 00:28:26,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 00:28:26,742 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 00:28:26,743 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 00:28:26,743 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/../../sv-benchmarks/c/termination-restricted-15/DivMinus2_true-termination_true-no-overflow.c [2018-11-23 00:28:26,786 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/data/d70c947f2/92d39146bb4149e1bd075886565cfcbc/FLAG018a0c660 [2018-11-23 00:28:27,128 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 00:28:27,129 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/sv-benchmarks/c/termination-restricted-15/DivMinus2_true-termination_true-no-overflow.c [2018-11-23 00:28:27,133 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/data/d70c947f2/92d39146bb4149e1bd075886565cfcbc/FLAG018a0c660 [2018-11-23 00:28:27,548 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/data/d70c947f2/92d39146bb4149e1bd075886565cfcbc [2018-11-23 00:28:27,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 00:28:27,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 00:28:27,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 00:28:27,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 00:28:27,555 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 00:28:27,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eac3ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27, skipping insertion in model container [2018-11-23 00:28:27,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 00:28:27,576 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 00:28:27,675 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 00:28:27,677 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 00:28:27,688 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 00:28:27,695 INFO L195 MainTranslator]: Completed translation [2018-11-23 00:28:27,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27 WrapperNode [2018-11-23 00:28:27,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 00:28:27,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 00:28:27,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 00:28:27,696 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 00:28:27,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,704 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 00:28:27,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 00:28:27,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 00:28:27,715 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 00:28:27,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... [2018-11-23 00:28:27,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 00:28:27,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 00:28:27,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 00:28:27,726 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 00:28:27,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:27,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 00:28:27,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 00:28:27,885 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 00:28:27,886 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-23 00:28:27,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:28:27 BoogieIcfgContainer [2018-11-23 00:28:27,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 00:28:27,886 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 00:28:27,886 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 00:28:27,889 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 00:28:27,889 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 00:28:27,889 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 12:28:27" (1/3) ... [2018-11-23 00:28:27,890 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@79daf273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 12:28:27, skipping insertion in model container [2018-11-23 00:28:27,890 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 00:28:27,890 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:28:27" (2/3) ... [2018-11-23 00:28:27,890 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@79daf273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 12:28:27, skipping insertion in model container [2018-11-23 00:28:27,890 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 00:28:27,891 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:28:27" (3/3) ... [2018-11-23 00:28:27,892 INFO L375 chiAutomizerObserver]: Analyzing ICFG DivMinus2_true-termination_true-no-overflow.c [2018-11-23 00:28:27,926 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 00:28:27,927 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 00:28:27,927 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 00:28:27,927 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 00:28:27,927 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 00:28:27,927 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 00:28:27,927 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 00:28:27,927 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 00:28:27,927 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 00:28:27,937 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2018-11-23 00:28:27,952 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-23 00:28:27,952 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 00:28:27,952 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 00:28:27,956 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-23 00:28:27,956 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 00:28:27,956 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 00:28:27,956 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2018-11-23 00:28:27,957 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-23 00:28:27,957 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 00:28:27,957 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 00:28:27,957 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-23 00:28:27,957 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 00:28:27,962 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 7#L14-2true [2018-11-23 00:28:27,962 INFO L796 eck$LassoCheckResult]: Loop: 7#L14-2true assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 3#L17-2true assume !(0 != main_~ytmp~0); 11#L16-2true main_~res~0 := 1 + main_~res~0; 7#L14-2true [2018-11-23 00:28:27,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2018-11-23 00:28:27,967 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:27,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:28,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:28:28,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:28,023 INFO L82 PathProgramCache]: Analyzing trace with hash 39957, now seen corresponding path program 1 times [2018-11-23 00:28:28,023 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:28,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:28,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:28:28,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:28,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 00:28:28,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-23 00:28:28,063 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-23 00:28:28,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-23 00:28:28,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 00:28:28,076 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-11-23 00:28:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:28:28,102 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2018-11-23 00:28:28,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-23 00:28:28,103 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2018-11-23 00:28:28,104 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-23 00:28:28,106 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 9 transitions. [2018-11-23 00:28:28,107 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2018-11-23 00:28:28,107 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2018-11-23 00:28:28,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 9 transitions. [2018-11-23 00:28:28,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 00:28:28,108 INFO L705 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-11-23 00:28:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 9 transitions. [2018-11-23 00:28:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-11-23 00:28:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-23 00:28:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2018-11-23 00:28:28,131 INFO L728 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-11-23 00:28:28,131 INFO L608 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2018-11-23 00:28:28,131 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 00:28:28,132 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2018-11-23 00:28:28,132 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-23 00:28:28,132 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 00:28:28,132 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 00:28:28,132 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-23 00:28:28,133 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2018-11-23 00:28:28,133 INFO L794 eck$LassoCheckResult]: Stem: 31#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 32#L14-2 [2018-11-23 00:28:28,133 INFO L796 eck$LassoCheckResult]: Loop: 32#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 29#L17-2 assume !!(0 != main_~ytmp~0); 30#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 33#L17-2 assume !(0 != main_~ytmp~0); 34#L16-2 main_~res~0 := 1 + main_~res~0; 32#L14-2 [2018-11-23 00:28:28,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2018-11-23 00:28:28,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:28,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:28,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:28:28,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:28,139 INFO L82 PathProgramCache]: Analyzing trace with hash 38452088, now seen corresponding path program 1 times [2018-11-23 00:28:28,139 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:28,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:28,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:28:28,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash 925955769, now seen corresponding path program 1 times [2018-11-23 00:28:28,151 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:28,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:28,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:28:28,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,239 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 00:28:28,240 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 00:28:28,240 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 00:28:28,240 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 00:28:28,241 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 00:28:28,241 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:28,241 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 00:28:28,241 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 00:28:28,241 INFO L131 ssoRankerPreferences]: Filename of dumped script: DivMinus2_true-termination_true-no-overflow.c_Iteration2_Loop [2018-11-23 00:28:28,241 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 00:28:28,241 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 00:28:28,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,358 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 00:28:28,358 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:28,370 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 00:28:28,370 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 00:28:28,389 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 00:28:28,389 INFO L448 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 /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:28,393 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 00:28:28,393 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 00:28:28,409 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 00:28:28,409 INFO L448 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 /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:28,412 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 00:28:28,412 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:28,429 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 00:28:28,429 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 00:28:28,575 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 00:28:28,576 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 00:28:28,576 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 00:28:28,576 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 00:28:28,576 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 00:28:28,576 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 00:28:28,577 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:28,577 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 00:28:28,577 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 00:28:28,577 INFO L131 ssoRankerPreferences]: Filename of dumped script: DivMinus2_true-termination_true-no-overflow.c_Iteration2_Loop [2018-11-23 00:28:28,577 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 00:28:28,577 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 00:28:28,578 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,642 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 00:28:28,645 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 00:28:28,646 INFO L122 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 [2018-11-23 00:28:28,647 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 00:28:28,648 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 00:28:28,648 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 00:28:28,648 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 00:28:28,648 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 00:28:28,650 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 00:28:28,650 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 00:28:28,656 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 00:28:28,661 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 00:28:28,661 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 2 variables to zero. [2018-11-23 00:28:28,662 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 00:28:28,662 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 00:28:28,663 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 00:28:28,663 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2018-11-23 00:28:28,664 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 00:28:28,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:28,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:28,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:28,734 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-23 00:28:28,735 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 3 Second operand 4 states. [2018-11-23 00:28:28,762 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 3. Second operand 4 states. Result 24 states and 33 transitions. Complement of second has 7 states. [2018-11-23 00:28:28,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 00:28:28,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 00:28:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2018-11-23 00:28:28,764 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 5 letters. [2018-11-23 00:28:28,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:28,765 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 5 letters. [2018-11-23 00:28:28,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:28,766 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 10 letters. [2018-11-23 00:28:28,766 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:28,766 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 33 transitions. [2018-11-23 00:28:28,768 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-23 00:28:28,769 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 18 states and 25 transitions. [2018-11-23 00:28:28,769 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2018-11-23 00:28:28,770 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-23 00:28:28,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 25 transitions. [2018-11-23 00:28:28,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 00:28:28,770 INFO L705 BuchiCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-11-23 00:28:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 25 transitions. [2018-11-23 00:28:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-11-23 00:28:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-23 00:28:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2018-11-23 00:28:28,772 INFO L728 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-11-23 00:28:28,772 INFO L608 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-11-23 00:28:28,772 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 00:28:28,772 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2018-11-23 00:28:28,772 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-23 00:28:28,773 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 00:28:28,773 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 00:28:28,773 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2018-11-23 00:28:28,773 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-23 00:28:28,773 INFO L794 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 108#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 105#L17-2 assume !!(0 != main_~ytmp~0); 106#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 110#L17-2 assume !!(0 != main_~ytmp~0); 104#L17 [2018-11-23 00:28:28,773 INFO L796 eck$LassoCheckResult]: Loop: 104#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 103#L17-2 assume !!(0 != main_~ytmp~0); 104#L17 [2018-11-23 00:28:28,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:28,773 INFO L82 PathProgramCache]: Analyzing trace with hash 29869542, now seen corresponding path program 1 times [2018-11-23 00:28:28,773 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:28,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:28,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:28:28,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1662, now seen corresponding path program 1 times [2018-11-23 00:28:28,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:28,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:28,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:28:28,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:28,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1360140509, now seen corresponding path program 2 times [2018-11-23 00:28:28,787 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:28,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:28,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:28:28,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:28,807 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 00:28:28,807 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 00:28:28,807 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 00:28:28,807 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 00:28:28,807 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 00:28:28,807 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:28,807 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 00:28:28,807 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 00:28:28,807 INFO L131 ssoRankerPreferences]: Filename of dumped script: DivMinus2_true-termination_true-no-overflow.c_Iteration3_Loop [2018-11-23 00:28:28,808 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 00:28:28,808 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 00:28:28,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:28,957 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 00:28:28,958 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:28,961 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 00:28:28,961 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 00:28:28,985 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 00:28:28,985 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:28,990 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 00:28:28,991 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:29,007 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 00:28:29,007 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 00:28:29,017 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 00:28:29,017 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=0} Honda state: {ULTIMATE.start_main_~x~0=0} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0=-4}, {ULTIMATE.start_main_~x~0=-3}, {ULTIMATE.start_main_~x~0=6}] Lambdas: [1, 1, 1] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:29,033 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 00:28:29,034 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 00:28:29,049 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 00:28:29,049 INFO L448 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 /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:29,052 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 00:28:29,052 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:29,084 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 00:28:29,085 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 00:28:29,129 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 00:28:29,130 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 00:28:29,130 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 00:28:29,130 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 00:28:29,130 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 00:28:29,130 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 00:28:29,130 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:29,131 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 00:28:29,131 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 00:28:29,131 INFO L131 ssoRankerPreferences]: Filename of dumped script: DivMinus2_true-termination_true-no-overflow.c_Iteration3_Loop [2018-11-23 00:28:29,131 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 00:28:29,131 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 00:28:29,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,191 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 00:28:29,191 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 00:28:29,192 INFO L122 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 [2018-11-23 00:28:29,192 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 00:28:29,192 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 00:28:29,192 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 00:28:29,192 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 00:28:29,194 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-23 00:28:29,194 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-23 00:28:29,198 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 00:28:29,198 INFO L122 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 [2018-11-23 00:28:29,198 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 00:28:29,199 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 00:28:29,199 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 00:28:29,199 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 00:28:29,199 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 00:28:29,199 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 00:28:29,200 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 00:28:29,202 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 00:28:29,202 INFO L122 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 [2018-11-23 00:28:29,203 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 00:28:29,203 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 00:28:29,203 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 00:28:29,203 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 00:28:29,205 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-23 00:28:29,205 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-23 00:28:29,209 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 00:28:29,210 INFO L122 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 [2018-11-23 00:28:29,210 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 00:28:29,210 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 00:28:29,210 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 00:28:29,211 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 00:28:29,211 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 00:28:29,211 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 00:28:29,211 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 00:28:29,214 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 00:28:29,216 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 00:28:29,216 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 00:28:29,216 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 00:28:29,216 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 00:28:29,217 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 00:28:29,217 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~ytmp~0) = 1*ULTIMATE.start_main_~ytmp~0 Supporting invariants [] [2018-11-23 00:28:29,217 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 00:28:29,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:29,252 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 [2018-11-23 00:28:29,252 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 9 Second operand 3 states. [2018-11-23 00:28:29,266 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 9. Second operand 3 states. Result 32 states and 45 transitions. Complement of second has 5 states. [2018-11-23 00:28:29,266 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 [2018-11-23 00:28:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 00:28:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2018-11-23 00:28:29,267 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 2 letters. [2018-11-23 00:28:29,267 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,267 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 2 letters. [2018-11-23 00:28:29,268 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,268 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 4 letters. [2018-11-23 00:28:29,268 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,268 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 45 transitions. [2018-11-23 00:28:29,269 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-23 00:28:29,270 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 29 states and 40 transitions. [2018-11-23 00:28:29,270 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-11-23 00:28:29,270 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2018-11-23 00:28:29,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 40 transitions. [2018-11-23 00:28:29,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 00:28:29,271 INFO L705 BuchiCegarLoop]: Abstraction has 29 states and 40 transitions. [2018-11-23 00:28:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 40 transitions. [2018-11-23 00:28:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-11-23 00:28:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-23 00:28:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-11-23 00:28:29,273 INFO L728 BuchiCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-11-23 00:28:29,273 INFO L608 BuchiCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-11-23 00:28:29,273 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 00:28:29,273 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 34 transitions. [2018-11-23 00:28:29,274 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-23 00:28:29,274 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 00:28:29,274 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 00:28:29,274 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2018-11-23 00:28:29,274 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-23 00:28:29,275 INFO L794 eck$LassoCheckResult]: Stem: 199#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 200#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 204#L17-2 assume !!(0 != main_~ytmp~0); 215#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 214#L17-2 assume !!(0 != main_~ytmp~0); 198#L17 assume !(main_~ytmp~0 > 0);main_~ytmp~0 := 1 + main_~ytmp~0;main_~x~0 := 1 + main_~x~0; 210#L17-2 [2018-11-23 00:28:29,275 INFO L796 eck$LassoCheckResult]: Loop: 210#L17-2 assume !!(0 != main_~ytmp~0); 211#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 210#L17-2 [2018-11-23 00:28:29,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:29,275 INFO L82 PathProgramCache]: Analyzing trace with hash 925955826, now seen corresponding path program 1 times [2018-11-23 00:28:29,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:29,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:29,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:29,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:28:29,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:29,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 00:28:29,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-23 00:28:29,308 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 00:28:29,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1572, now seen corresponding path program 2 times [2018-11-23 00:28:29,309 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:29,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:29,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:29,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 00:28:29,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:29,331 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 00:28:29,331 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 00:28:29,331 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 00:28:29,331 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 00:28:29,331 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 00:28:29,332 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:29,332 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 00:28:29,332 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 00:28:29,332 INFO L131 ssoRankerPreferences]: Filename of dumped script: DivMinus2_true-termination_true-no-overflow.c_Iteration4_Loop [2018-11-23 00:28:29,332 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 00:28:29,332 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 00:28:29,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,381 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 00:28:29,381 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:29,383 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 00:28:29,383 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/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 [2018-11-23 00:28:29,400 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 00:28:29,400 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 00:28:29,416 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 00:28:29,417 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 00:28:29,418 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 00:28:29,418 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 00:28:29,418 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 00:28:29,418 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 00:28:29,418 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:29,418 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 00:28:29,418 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 00:28:29,418 INFO L131 ssoRankerPreferences]: Filename of dumped script: DivMinus2_true-termination_true-no-overflow.c_Iteration4_Loop [2018-11-23 00:28:29,418 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 00:28:29,418 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 00:28:29,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,466 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 00:28:29,466 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 00:28:29,466 INFO L122 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 [2018-11-23 00:28:29,467 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 00:28:29,467 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 00:28:29,467 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 00:28:29,467 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 00:28:29,467 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 00:28:29,467 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 00:28:29,468 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 00:28:29,469 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 00:28:29,471 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 00:28:29,471 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 00:28:29,471 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 00:28:29,471 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 00:28:29,472 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 00:28:29,472 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~ytmp~0) = 1*ULTIMATE.start_main_~ytmp~0 Supporting invariants [] [2018-11-23 00:28:29,472 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 00:28:29,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:29,491 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 [2018-11-23 00:28:29,491 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 34 transitions. cyclomatic complexity: 14 Second operand 3 states. [2018-11-23 00:28:29,501 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 34 transitions. cyclomatic complexity: 14. Second operand 3 states. Result 32 states and 47 transitions. Complement of second has 5 states. [2018-11-23 00:28:29,501 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 [2018-11-23 00:28:29,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 00:28:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2018-11-23 00:28:29,502 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2018-11-23 00:28:29,502 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,502 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 8 letters. Loop has 2 letters. [2018-11-23 00:28:29,503 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,503 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2018-11-23 00:28:29,503 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,503 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 47 transitions. [2018-11-23 00:28:29,504 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-23 00:28:29,504 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 30 states and 44 transitions. [2018-11-23 00:28:29,505 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2018-11-23 00:28:29,505 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2018-11-23 00:28:29,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 44 transitions. [2018-11-23 00:28:29,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 00:28:29,505 INFO L705 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2018-11-23 00:28:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 44 transitions. [2018-11-23 00:28:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2018-11-23 00:28:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-23 00:28:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2018-11-23 00:28:29,507 INFO L728 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2018-11-23 00:28:29,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 00:28:29,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-23 00:28:29,508 INFO L87 Difference]: Start difference. First operand 28 states and 42 transitions. Second operand 4 states. [2018-11-23 00:28:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:28:29,516 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-11-23 00:28:29,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 00:28:29,516 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 24 transitions. [2018-11-23 00:28:29,517 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-11-23 00:28:29,517 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 14 states and 18 transitions. [2018-11-23 00:28:29,517 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2018-11-23 00:28:29,517 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2018-11-23 00:28:29,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 18 transitions. [2018-11-23 00:28:29,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 00:28:29,518 INFO L705 BuchiCegarLoop]: Abstraction has 14 states and 18 transitions. [2018-11-23 00:28:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 18 transitions. [2018-11-23 00:28:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2018-11-23 00:28:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-23 00:28:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2018-11-23 00:28:29,519 INFO L728 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2018-11-23 00:28:29,519 INFO L608 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2018-11-23 00:28:29,519 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-23 00:28:29,519 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 15 transitions. [2018-11-23 00:28:29,519 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-11-23 00:28:29,520 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 00:28:29,520 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 00:28:29,520 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1] [2018-11-23 00:28:29,520 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-11-23 00:28:29,520 INFO L794 eck$LassoCheckResult]: Stem: 344#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 345#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 342#L17-2 assume !!(0 != main_~ytmp~0); 343#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 346#L17-2 assume !(0 != main_~ytmp~0); 349#L16-2 main_~res~0 := 1 + main_~res~0; 347#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 348#L17-2 assume !!(0 != main_~ytmp~0); 351#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 350#L17-2 assume !!(0 != main_~ytmp~0); 341#L17 [2018-11-23 00:28:29,520 INFO L796 eck$LassoCheckResult]: Loop: 341#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 340#L17-2 assume !!(0 != main_~ytmp~0); 341#L17 [2018-11-23 00:28:29,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1275475969, now seen corresponding path program 2 times [2018-11-23 00:28:29,521 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:29,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:29,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:29,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:28:29,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:29,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 00:28:29,575 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 00:28:29,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 00:28:29,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 00:28:29,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 00:28:29,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:29,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 00:28:29,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-11-23 00:28:29,627 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-23 00:28:29,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1662, now seen corresponding path program 3 times [2018-11-23 00:28:29,627 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 00:28:29,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 00:28:29,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:29,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 00:28:29,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 00:28:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 00:28:29,651 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 00:28:29,652 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 00:28:29,652 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 00:28:29,652 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 00:28:29,652 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 00:28:29,652 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:29,652 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 00:28:29,652 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 00:28:29,652 INFO L131 ssoRankerPreferences]: Filename of dumped script: DivMinus2_true-termination_true-no-overflow.c_Iteration5_Loop [2018-11-23 00:28:29,652 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 00:28:29,652 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 00:28:29,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,698 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 00:28:29,698 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:29,702 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 00:28:29,702 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d539d387-a1fe-42f6-b68b-7211728edf84/bin-2019/uautomizer/z3 Starting monitored process 16 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:29,719 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 00:28:29,719 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 00:28:29,759 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 00:28:29,760 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 00:28:29,760 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 00:28:29,760 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 00:28:29,760 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 00:28:29,760 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 00:28:29,760 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 00:28:29,761 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 00:28:29,761 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 00:28:29,761 INFO L131 ssoRankerPreferences]: Filename of dumped script: DivMinus2_true-termination_true-no-overflow.c_Iteration5_Loop [2018-11-23 00:28:29,761 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 00:28:29,761 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 00:28:29,762 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 00:28:29,797 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 00:28:29,797 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 00:28:29,797 INFO L122 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 [2018-11-23 00:28:29,798 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 00:28:29,798 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 00:28:29,798 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 00:28:29,798 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 00:28:29,798 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 00:28:29,799 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 00:28:29,799 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 00:28:29,801 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 00:28:29,802 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 00:28:29,802 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 00:28:29,802 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 00:28:29,802 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 00:28:29,802 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 00:28:29,802 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~ytmp~0) = 1*ULTIMATE.start_main_~ytmp~0 Supporting invariants [] [2018-11-23 00:28:29,803 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 00:28:29,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:29,826 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 [2018-11-23 00:28:29,826 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand 3 states. [2018-11-23 00:28:29,836 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 20 states and 24 transitions. Complement of second has 5 states. [2018-11-23 00:28:29,836 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 [2018-11-23 00:28:29,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 00:28:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2018-11-23 00:28:29,837 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 10 letters. Loop has 2 letters. [2018-11-23 00:28:29,837 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,837 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 00:28:29,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:29,855 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 [2018-11-23 00:28:29,855 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand 3 states. [2018-11-23 00:28:29,866 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 19 states and 23 transitions. Complement of second has 5 states. [2018-11-23 00:28:29,867 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 [2018-11-23 00:28:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 00:28:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2018-11-23 00:28:29,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 2 letters. [2018-11-23 00:28:29,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,868 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 00:28:29,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 00:28:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 00:28:29,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 00:28:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 00:28:29,887 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 [2018-11-23 00:28:29,887 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand 3 states. [2018-11-23 00:28:29,893 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 19 states and 24 transitions. Complement of second has 6 states. [2018-11-23 00:28:29,893 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 [2018-11-23 00:28:29,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-23 00:28:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 12 transitions. [2018-11-23 00:28:29,894 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 10 letters. Loop has 2 letters. [2018-11-23 00:28:29,894 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,894 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 12 letters. Loop has 2 letters. [2018-11-23 00:28:29,894 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,895 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 10 letters. Loop has 4 letters. [2018-11-23 00:28:29,895 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 00:28:29,895 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 24 transitions. [2018-11-23 00:28:29,895 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 00:28:29,896 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 0 states and 0 transitions. [2018-11-23 00:28:29,896 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 00:28:29,896 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 00:28:29,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 00:28:29,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 00:28:29,896 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 00:28:29,896 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 00:28:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-23 00:28:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-11-23 00:28:29,896 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 10 states. [2018-11-23 00:28:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 00:28:29,897 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-11-23 00:28:29,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-23 00:28:29,897 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-11-23 00:28:29,897 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 00:28:29,897 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 00:28:29,897 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 00:28:29,897 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 00:28:29,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 00:28:29,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 00:28:29,897 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 00:28:29,897 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 00:28:29,898 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 00:28:29,898 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-23 00:28:29,898 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 00:28:29,898 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 00:28:29,898 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 00:28:29,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 12:28:29 BoogieIcfgContainer [2018-11-23 00:28:29,903 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 00:28:29,903 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 00:28:29,903 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 00:28:29,904 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 00:28:29,904 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:28:27" (3/4) ... [2018-11-23 00:28:29,906 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 00:28:29,906 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 00:28:29,907 INFO L168 Benchmark]: Toolchain (without parser) took 2355.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -108.1 MB). Peak memory consumption was 27.2 MB. Max. memory is 11.5 GB. [2018-11-23 00:28:29,908 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 00:28:29,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.38 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 00:28:29,908 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.30 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 00:28:29,909 INFO L168 Benchmark]: Boogie Preprocessor took 10.77 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 00:28:29,909 INFO L168 Benchmark]: RCFGBuilder took 160.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -175.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-23 00:28:29,910 INFO L168 Benchmark]: BuchiAutomizer took 2016.82 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: 53.8 MB). Peak memory consumption was 53.8 MB. Max. memory is 11.5 GB. [2018-11-23 00:28:29,910 INFO L168 Benchmark]: Witness Printer took 2.90 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. [2018-11-23 00:28:29,912 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 143.38 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 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 18.30 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.77 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 160.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.3 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -175.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2016.82 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: 53.8 MB). Peak memory consumption was 53.8 MB. Max. memory is 11.5 GB. * Witness Printer took 2.90 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 7 terminating modules (3 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 ytmp and consists of 3 locations. One deterministic module has affine ranking function ytmp and consists of 3 locations. One nondeterministic module has affine ranking function ytmp and consists of 3 locations. 3 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.9s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 1.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 10 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 24 states and ocurred in iteration 3. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/1 HoareTripleCheckerStatistics: 49 SDtfs, 44 SDslu, 16 SDs, 0 SdLazy, 60 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax164 hnf100 lsp44 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq172 hnf94 smp84 dnf100 smp100 tf111 neg97 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 6ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 1 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...