./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2_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_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/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 31d0c4253184c01eb9f9573658b07bed7aa94585 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 22:22:36,949 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 22:22:36,950 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 22:22:36,957 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 22:22:36,958 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 22:22:36,958 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 22:22:36,959 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 22:22:36,960 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 22:22:36,961 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 22:22:36,961 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 22:22:36,962 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 22:22:36,962 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 22:22:36,963 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 22:22:36,963 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 22:22:36,964 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 22:22:36,965 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 22:22:36,965 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 22:22:36,966 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 22:22:36,967 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 22:22:36,968 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 22:22:36,969 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 22:22:36,970 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 22:22:36,971 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 22:22:36,971 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 22:22:36,972 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 22:22:36,972 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 22:22:36,973 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 22:22:36,973 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 22:22:36,974 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 22:22:36,975 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 22:22:36,975 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 22:22:36,975 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 22:22:36,975 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 22:22:36,976 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 22:22:36,976 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 22:22:36,977 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 22:22:36,977 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-22 22:22:36,985 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 22:22:36,985 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 22:22:36,986 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-22 22:22:36,986 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-22 22:22:36,987 INFO L133 SettingsManager]: * Use SBE=true [2018-11-22 22:22:36,987 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-22 22:22:36,987 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-22 22:22:36,987 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-22 22:22:36,987 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-22 22:22:36,987 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-22 22:22:36,987 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-22 22:22:36,987 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 22:22:36,988 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-22 22:22:36,988 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 22:22:36,988 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 22:22:36,988 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-22 22:22:36,988 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-22 22:22:36,988 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-22 22:22:36,988 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 22:22:36,988 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-22 22:22:36,989 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 22:22:36,989 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-22 22:22:36,989 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 22:22:36,989 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 22:22:36,989 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-22 22:22:36,989 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 22:22:36,990 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-22 22:22:36,990 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-22 22:22:36,990 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-22 22:22:36,990 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_478f060a-9ab2-4c1b-a118-d8ace09a4a60/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 -> 31d0c4253184c01eb9f9573658b07bed7aa94585 [2018-11-22 22:22:37,013 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 22:22:37,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 22:22:37,025 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 22:22:37,026 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 22:22:37,026 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 22:22:37,027 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2_true-termination_true-no-overflow.c [2018-11-22 22:22:37,073 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/data/eca72038d/ec89e932fce74277b88fdb97757bf265/FLAG7a64392ef [2018-11-22 22:22:37,369 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 22:22:37,370 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2_true-termination_true-no-overflow.c [2018-11-22 22:22:37,374 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/data/eca72038d/ec89e932fce74277b88fdb97757bf265/FLAG7a64392ef [2018-11-22 22:22:37,385 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/data/eca72038d/ec89e932fce74277b88fdb97757bf265 [2018-11-22 22:22:37,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 22:22:37,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 22:22:37,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 22:22:37,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 22:22:37,393 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 22:22:37,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c8d80d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37, skipping insertion in model container [2018-11-22 22:22:37,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 22:22:37,418 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 22:22:37,521 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:22:37,524 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 22:22:37,532 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 22:22:37,541 INFO L195 MainTranslator]: Completed translation [2018-11-22 22:22:37,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37 WrapperNode [2018-11-22 22:22:37,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 22:22:37,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 22:22:37,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 22:22:37,542 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 22:22:37,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 22:22:37,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 22:22:37,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 22:22:37,561 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 22:22:37,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... [2018-11-22 22:22:37,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 22:22:37,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 22:22:37,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 22:22:37,572 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 22:22:37,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/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 [2018-11-22 22:22:37,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 22:22:37,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 22:22:37,719 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 22:22:37,720 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-22 22:22:37,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:22:37 BoogieIcfgContainer [2018-11-22 22:22:37,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 22:22:37,720 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-22 22:22:37,721 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-22 22:22:37,723 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-22 22:22:37,723 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-22 22:22:37,724 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.11 10:22:37" (1/3) ... [2018-11-22 22:22:37,724 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@732ea354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 10:22:37, skipping insertion in model container [2018-11-22 22:22:37,724 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-22 22:22:37,724 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 10:22:37" (2/3) ... [2018-11-22 22:22:37,725 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@732ea354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.11 10:22:37, skipping insertion in model container [2018-11-22 22:22:37,725 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-22 22:22:37,725 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:22:37" (3/3) ... [2018-11-22 22:22:37,726 INFO L375 chiAutomizerObserver]: Analyzing ICFG Urban-WST2013-Fig2_true-termination_true-no-overflow.c [2018-11-22 22:22:37,760 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-22 22:22:37,761 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-22 22:22:37,761 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-22 22:22:37,761 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-22 22:22:37,761 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 22:22:37,761 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 22:22:37,761 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-22 22:22:37,761 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 22:22:37,761 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-22 22:22:37,770 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2018-11-22 22:22:37,784 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-11-22 22:22:37,785 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:37,785 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:37,788 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:37,789 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-22 22:22:37,789 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-22 22:22:37,789 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2018-11-22 22:22:37,789 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-11-22 22:22:37,789 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:37,789 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:37,790 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:37,790 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-22 22:22:37,794 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L19-2true [2018-11-22 22:22:37,794 INFO L796 eck$LassoCheckResult]: Loop: 6#L19-2true assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 9#L21-2true assume !(main_~x2~0 > 1); 8#L21-3true main_~x1~0 := 1 + main_~x1~0; 6#L19-2true [2018-11-22 22:22:37,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:37,799 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2018-11-22 22:22:37,800 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:37,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:37,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:37,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:37,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:37,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2018-11-22 22:22:37,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:37,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:37,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:37,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:37,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:37,906 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 22:22:37,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-22 22:22:37,909 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 22:22:37,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-22 22:22:37,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-22 22:22:37,921 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2018-11-22 22:22:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:22:37,941 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-11-22 22:22:37,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-22 22:22:37,942 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2018-11-22 22:22:37,943 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-22 22:22:37,945 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2018-11-22 22:22:37,946 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2018-11-22 22:22:37,946 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2018-11-22 22:22:37,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2018-11-22 22:22:37,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:37,947 INFO L705 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2018-11-22 22:22:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2018-11-22 22:22:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-11-22 22:22:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-22 22:22:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2018-11-22 22:22:37,970 INFO L728 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2018-11-22 22:22:37,970 INFO L608 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2018-11-22 22:22:37,970 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-22 22:22:37,970 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2018-11-22 22:22:37,970 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-22 22:22:37,970 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:37,971 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:37,971 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:37,971 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-22 22:22:37,971 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 27#L19-2 [2018-11-22 22:22:37,971 INFO L796 eck$LassoCheckResult]: Loop: 27#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 28#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 30#L21-2 assume !(main_~x2~0 > 1); 29#L21-3 main_~x1~0 := 1 + main_~x1~0; 27#L19-2 [2018-11-22 22:22:37,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:37,972 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2018-11-22 22:22:37,972 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:37,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:37,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:37,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:37,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:37,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:37,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2018-11-22 22:22:37,976 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:37,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:37,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:37,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:37,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:22:38,006 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:22:38,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:22:38,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-11-22 22:22:38,055 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 22:22:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-22 22:22:38,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-22 22:22:38,056 INFO L87 Difference]: Start difference. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand 4 states. [2018-11-22 22:22:38,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:22:38,066 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2018-11-22 22:22:38,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-22 22:22:38,067 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6 states and 7 transitions. [2018-11-22 22:22:38,068 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-22 22:22:38,068 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6 states to 6 states and 7 transitions. [2018-11-22 22:22:38,068 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2018-11-22 22:22:38,068 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2018-11-22 22:22:38,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 7 transitions. [2018-11-22 22:22:38,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:38,069 INFO L705 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-11-22 22:22:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 7 transitions. [2018-11-22 22:22:38,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-11-22 22:22:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-22 22:22:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-11-22 22:22:38,070 INFO L728 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-11-22 22:22:38,070 INFO L608 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-11-22 22:22:38,070 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-22 22:22:38,070 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2018-11-22 22:22:38,070 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-22 22:22:38,071 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:38,071 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:38,071 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:38,071 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2018-11-22 22:22:38,071 INFO L794 eck$LassoCheckResult]: Stem: 53#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 54#L19-2 [2018-11-22 22:22:38,071 INFO L796 eck$LassoCheckResult]: Loop: 54#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 55#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 57#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 58#L21-2 assume !(main_~x2~0 > 1); 56#L21-3 main_~x1~0 := 1 + main_~x1~0; 54#L19-2 [2018-11-22 22:22:38,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2018-11-22 22:22:38,072 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:38,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,075 INFO L82 PathProgramCache]: Analyzing trace with hash 38449199, now seen corresponding path program 2 times [2018-11-22 22:22:38,075 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,110 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:22:38,110 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:22:38,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:22:38,122 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:22:38,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:22:38,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:22:38,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-22 22:22:38,141 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 22:22:38,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 22:22:38,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-22 22:22:38,141 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand 5 states. [2018-11-22 22:22:38,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:22:38,150 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2018-11-22 22:22:38,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 22:22:38,150 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 8 transitions. [2018-11-22 22:22:38,151 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-22 22:22:38,151 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 8 transitions. [2018-11-22 22:22:38,151 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2018-11-22 22:22:38,151 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2018-11-22 22:22:38,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2018-11-22 22:22:38,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:38,152 INFO L705 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-11-22 22:22:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2018-11-22 22:22:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-11-22 22:22:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-22 22:22:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-11-22 22:22:38,153 INFO L728 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-11-22 22:22:38,153 INFO L608 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-11-22 22:22:38,153 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-22 22:22:38,153 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2018-11-22 22:22:38,153 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2018-11-22 22:22:38,153 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:38,153 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:38,154 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:38,154 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 1, 1, 1] [2018-11-22 22:22:38,154 INFO L794 eck$LassoCheckResult]: Stem: 86#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 87#L19-2 [2018-11-22 22:22:38,154 INFO L796 eck$LassoCheckResult]: Loop: 87#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 88#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 90#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 92#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 91#L21-2 assume !(main_~x2~0 > 1); 89#L21-3 main_~x1~0 := 1 + main_~x1~0; 87#L19-2 [2018-11-22 22:22:38,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,154 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2018-11-22 22:22:38,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1191926928, now seen corresponding path program 3 times [2018-11-22 22:22:38,158 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:22:38,197 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:22:38,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 22:22:38,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-22 22:22:38,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:22:38,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:22:38,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-22 22:22:38,233 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 22:22:38,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 22:22:38,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-11-22 22:22:38,234 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 6 states. [2018-11-22 22:22:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:22:38,249 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2018-11-22 22:22:38,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 22:22:38,250 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2018-11-22 22:22:38,250 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-22 22:22:38,250 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 8 states and 9 transitions. [2018-11-22 22:22:38,250 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2018-11-22 22:22:38,251 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2018-11-22 22:22:38,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2018-11-22 22:22:38,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:38,251 INFO L705 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-11-22 22:22:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2018-11-22 22:22:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-11-22 22:22:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-11-22 22:22:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-11-22 22:22:38,252 INFO L728 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-11-22 22:22:38,252 INFO L608 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-11-22 22:22:38,252 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-22 22:22:38,252 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2018-11-22 22:22:38,253 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-22 22:22:38,253 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:38,253 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:38,253 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:38,253 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 1, 1, 1] [2018-11-22 22:22:38,253 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 126#L19-2 [2018-11-22 22:22:38,253 INFO L796 eck$LassoCheckResult]: Loop: 126#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 127#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 129#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 132#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 131#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 130#L21-2 assume !(main_~x2~0 > 1); 128#L21-3 main_~x1~0 := 1 + main_~x1~0; 126#L19-2 [2018-11-22 22:22:38,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,254 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 5 times [2018-11-22 22:22:38,254 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1704969137, now seen corresponding path program 4 times [2018-11-22 22:22:38,257 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:22:38,308 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:22:38,316 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 22:22:38,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 22:22:38,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:22:38,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,343 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:22:38,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-22 22:22:38,343 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 22:22:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-22 22:22:38,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-22 22:22:38,344 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 7 states. [2018-11-22 22:22:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:22:38,368 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-11-22 22:22:38,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 22:22:38,368 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2018-11-22 22:22:38,369 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2018-11-22 22:22:38,369 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2018-11-22 22:22:38,369 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2018-11-22 22:22:38,369 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2018-11-22 22:22:38,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2018-11-22 22:22:38,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:38,369 INFO L705 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-11-22 22:22:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2018-11-22 22:22:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-11-22 22:22:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-22 22:22:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-11-22 22:22:38,371 INFO L728 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-11-22 22:22:38,371 INFO L608 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-11-22 22:22:38,371 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-22 22:22:38,371 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2018-11-22 22:22:38,371 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2018-11-22 22:22:38,372 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:38,372 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:38,372 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:38,372 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [5, 1, 1, 1] [2018-11-22 22:22:38,372 INFO L794 eck$LassoCheckResult]: Stem: 170#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 171#L19-2 [2018-11-22 22:22:38,372 INFO L796 eck$LassoCheckResult]: Loop: 171#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 172#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 174#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 178#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 177#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 176#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 175#L21-2 assume !(main_~x2~0 > 1); 173#L21-3 main_~x1~0 := 1 + main_~x1~0; 171#L19-2 [2018-11-22 22:22:38,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,373 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 6 times [2018-11-22 22:22:38,373 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1314433936, now seen corresponding path program 5 times [2018-11-22 22:22:38,377 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:22:38,431 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:22:38,437 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-22 22:22:38,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-22 22:22:38,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:22:38,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:22:38,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-22 22:22:38,463 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 22:22:38,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-22 22:22:38,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-11-22 22:22:38,464 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 8 states. [2018-11-22 22:22:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:22:38,480 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-11-22 22:22:38,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-22 22:22:38,480 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2018-11-22 22:22:38,481 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-22 22:22:38,481 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2018-11-22 22:22:38,481 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2018-11-22 22:22:38,481 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2018-11-22 22:22:38,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2018-11-22 22:22:38,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:38,481 INFO L705 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-11-22 22:22:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2018-11-22 22:22:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-11-22 22:22:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-11-22 22:22:38,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-11-22 22:22:38,483 INFO L728 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-11-22 22:22:38,483 INFO L608 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-11-22 22:22:38,483 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-22 22:22:38,483 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2018-11-22 22:22:38,483 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2018-11-22 22:22:38,483 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:38,483 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:38,484 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:38,484 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [6, 1, 1, 1] [2018-11-22 22:22:38,484 INFO L794 eck$LassoCheckResult]: Stem: 221#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 222#L19-2 [2018-11-22 22:22:38,484 INFO L796 eck$LassoCheckResult]: Loop: 222#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 223#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 225#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 230#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 229#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 228#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 227#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 226#L21-2 assume !(main_~x2~0 > 1); 224#L21-3 main_~x1~0 := 1 + main_~x1~0; 222#L19-2 [2018-11-22 22:22:38,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 7 times [2018-11-22 22:22:38,484 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,487 INFO L82 PathProgramCache]: Analyzing trace with hash -2092744593, now seen corresponding path program 6 times [2018-11-22 22:22:38,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:38,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:22:38,534 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:22:38,545 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-22 22:22:38,566 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-11-22 22:22:38,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:22:38,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:22:38,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-22 22:22:38,592 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 22:22:38,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-22 22:22:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-22 22:22:38,592 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 9 states. [2018-11-22 22:22:38,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:22:38,606 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-11-22 22:22:38,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-22 22:22:38,607 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2018-11-22 22:22:38,607 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-22 22:22:38,607 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2018-11-22 22:22:38,607 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-22 22:22:38,608 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-11-22 22:22:38,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2018-11-22 22:22:38,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:38,608 INFO L705 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-11-22 22:22:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2018-11-22 22:22:38,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-11-22 22:22:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-22 22:22:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-11-22 22:22:38,609 INFO L728 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-11-22 22:22:38,609 INFO L608 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-11-22 22:22:38,609 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-22 22:22:38,609 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2018-11-22 22:22:38,609 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2018-11-22 22:22:38,609 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:38,609 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:38,609 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:38,610 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [7, 1, 1, 1] [2018-11-22 22:22:38,610 INFO L794 eck$LassoCheckResult]: Stem: 278#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 279#L19-2 [2018-11-22 22:22:38,610 INFO L796 eck$LassoCheckResult]: Loop: 279#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 280#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 282#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 288#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 287#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 286#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 285#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 284#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 283#L21-2 assume !(main_~x2~0 > 1); 281#L21-3 main_~x1~0 := 1 + main_~x1~0; 279#L19-2 [2018-11-22 22:22:38,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,610 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 8 times [2018-11-22 22:22:38,610 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash -450571184, now seen corresponding path program 7 times [2018-11-22 22:22:38,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:22:38,687 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:22:38,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:22:38,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-22 22:22:38,726 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 22:22:38,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-22 22:22:38,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-11-22 22:22:38,727 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand 10 states. [2018-11-22 22:22:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:22:38,755 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-11-22 22:22:38,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-22 22:22:38,755 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2018-11-22 22:22:38,755 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2018-11-22 22:22:38,756 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2018-11-22 22:22:38,756 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-11-22 22:22:38,756 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-11-22 22:22:38,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2018-11-22 22:22:38,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:38,756 INFO L705 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-11-22 22:22:38,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2018-11-22 22:22:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-22 22:22:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-22 22:22:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-11-22 22:22:38,758 INFO L728 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-11-22 22:22:38,758 INFO L608 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-11-22 22:22:38,758 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-22 22:22:38,758 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2018-11-22 22:22:38,758 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2018-11-22 22:22:38,758 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:38,759 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:38,759 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:38,759 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [8, 1, 1, 1] [2018-11-22 22:22:38,759 INFO L794 eck$LassoCheckResult]: Stem: 341#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 342#L19-2 [2018-11-22 22:22:38,759 INFO L796 eck$LassoCheckResult]: Loop: 342#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 343#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 345#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 352#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 351#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 350#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 349#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 348#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 347#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 346#L21-2 assume !(main_~x2~0 > 1); 344#L21-3 main_~x1~0 := 1 + main_~x1~0; 342#L19-2 [2018-11-22 22:22:38,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 9 times [2018-11-22 22:22:38,760 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:38,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1082803057, now seen corresponding path program 8 times [2018-11-22 22:22:38,763 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 22:22:38,818 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 22:22:38,824 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-22 22:22:38,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-22 22:22:38,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 22:22:38,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:38,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-22 22:22:38,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-22 22:22:38,852 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-22 22:22:38,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-22 22:22:38,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-11-22 22:22:38,853 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 11 states. [2018-11-22 22:22:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 22:22:38,874 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-11-22 22:22:38,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-22 22:22:38,875 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2018-11-22 22:22:38,876 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2018-11-22 22:22:38,876 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2018-11-22 22:22:38,876 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2018-11-22 22:22:38,876 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2018-11-22 22:22:38,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2018-11-22 22:22:38,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:38,877 INFO L705 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-11-22 22:22:38,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2018-11-22 22:22:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-22 22:22:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-22 22:22:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-11-22 22:22:38,878 INFO L728 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-11-22 22:22:38,878 INFO L608 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-11-22 22:22:38,878 INFO L442 BuchiCegarLoop]: ======== Iteration 10============ [2018-11-22 22:22:38,878 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2018-11-22 22:22:38,878 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2018-11-22 22:22:38,879 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:38,879 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:38,879 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1] [2018-11-22 22:22:38,879 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [9, 1, 1, 1] [2018-11-22 22:22:38,879 INFO L794 eck$LassoCheckResult]: Stem: 410#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 411#L19-2 [2018-11-22 22:22:38,879 INFO L796 eck$LassoCheckResult]: Loop: 411#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 412#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 414#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 422#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 421#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 420#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 419#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 418#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 417#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 416#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 415#L21-2 assume !(main_~x2~0 > 1); 413#L21-3 main_~x1~0 := 1 + main_~x1~0; 411#L19-2 [2018-11-22 22:22:38,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 10 times [2018-11-22 22:22:38,880 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash 792845360, now seen corresponding path program 9 times [2018-11-22 22:22:38,887 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:38,899 INFO L82 PathProgramCache]: Analyzing trace with hash 287286735, now seen corresponding path program 1 times [2018-11-22 22:22:38,899 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:38,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:38,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:38,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:38,997 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 22:22:38,998 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 22:22:38,998 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 22:22:38,998 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 22:22:38,998 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 22:22:38,999 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:38,999 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 22:22:38,999 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 22:22:38,999 INFO L131 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2_true-termination_true-no-overflow.c_Iteration10_Loop [2018-11-22 22:22:38,999 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 22:22:38,999 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 22:22:39,010 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,015 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,017 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,075 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 22:22:39,075 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/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 [2018-11-22 22:22:39,079 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 22:22:39,079 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 22:22:39,096 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 22:22:39,097 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_478f060a-9ab2-4c1b-a118-d8ace09a4a60/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 [2018-11-22 22:22:39,099 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 22:22:39,099 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 22:22:39,122 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 22:22:39,122 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_478f060a-9ab2-4c1b-a118-d8ace09a4a60/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 [2018-11-22 22:22:39,127 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 22:22:39,128 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/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 [2018-11-22 22:22:39,144 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 22:22:39,144 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 22:22:39,169 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 22:22:39,170 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 22:22:39,170 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 22:22:39,170 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 22:22:39,170 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 22:22:39,170 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 22:22:39,171 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,171 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 22:22:39,171 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 22:22:39,171 INFO L131 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2_true-termination_true-no-overflow.c_Iteration10_Loop [2018-11-22 22:22:39,171 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 22:22:39,171 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 22:22:39,172 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,223 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 22:22:39,227 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 22:22:39,228 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 [2018-11-22 22:22:39,230 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 22:22:39,230 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 22:22:39,230 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 22:22:39,230 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 22:22:39,233 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-22 22:22:39,233 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-22 22:22:39,235 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 22:22:39,235 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 [2018-11-22 22:22:39,236 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 22:22:39,236 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 22:22:39,236 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 22:22:39,236 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 22:22:39,237 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-22 22:22:39,237 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-22 22:22:39,240 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 22:22:39,241 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 [2018-11-22 22:22:39,241 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 22:22:39,241 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 22:22:39,242 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 22:22:39,242 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 22:22:39,242 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 22:22:39,242 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 22:22:39,242 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 22:22:39,245 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 22:22:39,250 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 22:22:39,250 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-22 22:22:39,252 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 22:22:39,253 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 22:22:39,253 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 22:22:39,253 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x1~0) = -2*ULTIMATE.start_main_~x1~0 + 21 Supporting invariants [] [2018-11-22 22:22:39,254 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 22:22:39,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-22 22:22:39,309 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 [2018-11-22 22:22:39,310 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 3 states. [2018-11-22 22:22:39,330 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 25 states and 28 transitions. Complement of second has 4 states. [2018-11-22 22:22:39,330 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 [2018-11-22 22:22:39,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2018-11-22 22:22:39,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2018-11-22 22:22:39,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 12 letters. [2018-11-22 22:22:39,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 13 letters. Loop has 12 letters. [2018-11-22 22:22:39,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 24 letters. [2018-11-22 22:22:39,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,333 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 28 transitions. [2018-11-22 22:22:39,333 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2018-11-22 22:22:39,334 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 27 transitions. [2018-11-22 22:22:39,334 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-11-22 22:22:39,334 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-11-22 22:22:39,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 27 transitions. [2018-11-22 22:22:39,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 22:22:39,334 INFO L705 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-11-22 22:22:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 27 transitions. [2018-11-22 22:22:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2018-11-22 22:22:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-22 22:22:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2018-11-22 22:22:39,337 INFO L728 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2018-11-22 22:22:39,337 INFO L608 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2018-11-22 22:22:39,337 INFO L442 BuchiCegarLoop]: ======== Iteration 11============ [2018-11-22 22:22:39,337 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2018-11-22 22:22:39,338 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2018-11-22 22:22:39,338 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:39,338 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:39,338 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-22 22:22:39,338 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1] [2018-11-22 22:22:39,338 INFO L794 eck$LassoCheckResult]: Stem: 507#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 508#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 510#L21-2 [2018-11-22 22:22:39,338 INFO L796 eck$LassoCheckResult]: Loop: 510#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 510#L21-2 [2018-11-22 22:22:39,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2018-11-22 22:22:39,338 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:39,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:39,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:39,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2018-11-22 22:22:39,341 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:39,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:39,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:39,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,343 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2018-11-22 22:22:39,343 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:39,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:39,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:39,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,358 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 22:22:39,359 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 22:22:39,359 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 22:22:39,359 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 22:22:39,359 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 22:22:39,359 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,359 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 22:22:39,359 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 22:22:39,359 INFO L131 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2_true-termination_true-no-overflow.c_Iteration11_Loop [2018-11-22 22:22:39,359 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 22:22:39,359 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 22:22:39,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,388 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 22:22:39,388 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,389 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 22:22:39,389 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 22:22:39,405 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 22:22:39,405 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_478f060a-9ab2-4c1b-a118-d8ace09a4a60/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 [2018-11-22 22:22:39,407 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 22:22:39,407 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 22:22:39,422 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 22:22:39,422 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_478f060a-9ab2-4c1b-a118-d8ace09a4a60/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 [2018-11-22 22:22:39,425 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 22:22:39,425 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,443 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 22:22:39,443 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 22:22:39,459 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 22:22:39,460 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 22:22:39,460 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 22:22:39,460 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 22:22:39,460 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 22:22:39,460 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 22:22:39,460 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,460 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 22:22:39,460 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 22:22:39,460 INFO L131 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2_true-termination_true-no-overflow.c_Iteration11_Loop [2018-11-22 22:22:39,460 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 22:22:39,460 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 22:22:39,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,463 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,483 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 22:22:39,483 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 22:22:39,484 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 [2018-11-22 22:22:39,484 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 22:22:39,484 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 22:22:39,484 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 22:22:39,484 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 22:22:39,485 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-22 22:22:39,485 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-22 22:22:39,487 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 22:22:39,488 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 [2018-11-22 22:22:39,488 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 22:22:39,489 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 22:22:39,489 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 22:22:39,489 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 22:22:39,490 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-22 22:22:39,490 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-22 22:22:39,493 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 22:22:39,493 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 [2018-11-22 22:22:39,494 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 22:22:39,494 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 22:22:39,494 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 22:22:39,494 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 22:22:39,495 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 22:22:39,495 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 22:22:39,495 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 22:22:39,497 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 22:22:39,499 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 22:22:39,499 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-22 22:22:39,499 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 22:22:39,500 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 22:22:39,500 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 22:22:39,500 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] [2018-11-22 22:22:39,500 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 22:22:39,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:39,516 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 [2018-11-22 22:22:39,516 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 2 states. [2018-11-22 22:22:39,524 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 31 states and 36 transitions. Complement of second has 5 states. [2018-11-22 22:22:39,524 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 [2018-11-22 22:22:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2018-11-22 22:22:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2018-11-22 22:22:39,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2018-11-22 22:22:39,525 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2018-11-22 22:22:39,525 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,526 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2018-11-22 22:22:39,526 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,526 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 36 transitions. [2018-11-22 22:22:39,527 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2018-11-22 22:22:39,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 27 states and 31 transitions. [2018-11-22 22:22:39,527 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2018-11-22 22:22:39,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2018-11-22 22:22:39,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 31 transitions. [2018-11-22 22:22:39,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-22 22:22:39,528 INFO L705 BuchiCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-11-22 22:22:39,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 31 transitions. [2018-11-22 22:22:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2018-11-22 22:22:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-22 22:22:39,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-11-22 22:22:39,529 INFO L728 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-11-22 22:22:39,530 INFO L608 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-11-22 22:22:39,530 INFO L442 BuchiCegarLoop]: ======== Iteration 12============ [2018-11-22 22:22:39,530 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2018-11-22 22:22:39,530 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2018-11-22 22:22:39,530 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-22 22:22:39,530 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-22 22:22:39,531 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [9, 2, 1, 1, 1] [2018-11-22 22:22:39,531 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1] [2018-11-22 22:22:39,531 INFO L794 eck$LassoCheckResult]: Stem: 582#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 583#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 584#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 588#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 596#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 595#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 594#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 593#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 592#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 591#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 590#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 589#L21-2 assume !(main_~x2~0 > 1); 587#L21-3 main_~x1~0 := 1 + main_~x1~0; 585#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 586#L21-2 [2018-11-22 22:22:39,531 INFO L796 eck$LassoCheckResult]: Loop: 586#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 586#L21-2 [2018-11-22 22:22:39,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,531 INFO L82 PathProgramCache]: Analyzing trace with hash 315954203, now seen corresponding path program 2 times [2018-11-22 22:22:39,532 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:39,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:39,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 22:22:39,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,542 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2018-11-22 22:22:39,542 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:39,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:39,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:39,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1204645720, now seen corresponding path program 3 times [2018-11-22 22:22:39,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-22 22:22:39,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-22 22:22:39,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 22:22:39,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 22:22:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-22 22:22:39,565 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 22:22:39,565 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 22:22:39,565 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 22:22:39,565 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 22:22:39,565 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-22 22:22:39,566 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,566 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 22:22:39,566 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 22:22:39,566 INFO L131 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2_true-termination_true-no-overflow.c_Iteration12_Loop [2018-11-22 22:22:39,566 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 22:22:39,566 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 22:22:39,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,572 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,593 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 22:22:39,593 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,596 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 22:22:39,596 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 22:22:39,611 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 22:22:39,611 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 19 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,614 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 22:22:39,614 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 22:22:39,629 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-22 22:22:39,629 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,632 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-22 22:22:39,632 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_478f060a-9ab2-4c1b-a118-d8ace09a4a60/bin-2019/uautomizer/z3 Starting monitored process 21 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,649 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-22 22:22:39,649 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-22 22:22:39,672 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-22 22:22:39,673 INFO L216 LassoAnalysis]: Preferences: [2018-11-22 22:22:39,673 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-22 22:22:39,684 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-22 22:22:39,684 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-22 22:22:39,684 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-22 22:22:39,684 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-22 22:22:39,684 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-22 22:22:39,685 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-22 22:22:39,685 INFO L131 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2_true-termination_true-no-overflow.c_Iteration12_Loop [2018-11-22 22:22:39,685 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-22 22:22:39,685 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-22 22:22:39,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,692 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-22 22:22:39,728 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-22 22:22:39,728 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-22 22:22:39,729 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 [2018-11-22 22:22:39,729 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 22:22:39,730 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 22:22:39,730 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 22:22:39,730 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 22:22:39,731 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-22 22:22:39,731 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-22 22:22:39,733 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 22:22:39,734 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 [2018-11-22 22:22:39,734 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 22:22:39,738 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 22:22:39,739 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 22:22:39,739 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 22:22:39,740 INFO L402 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2018-11-22 22:22:39,740 INFO L403 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2018-11-22 22:22:39,742 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-22 22:22:39,742 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 [2018-11-22 22:22:39,743 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-22 22:22:39,743 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-22 22:22:39,743 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-22 22:22:39,743 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-22 22:22:39,743 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-22 22:22:39,744 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-22 22:22:39,744 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-22 22:22:39,746 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-22 22:22:39,747 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-22 22:22:39,747 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-22 22:22:39,747 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-22 22:22:39,748 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-22 22:22:39,748 INFO L518 LassoAnalysis]: Proved termination. [2018-11-22 22:22:39,748 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] [2018-11-22 22:22:39,748 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-22 22:22:39,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:39,780 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 [2018-11-22 22:22:39,780 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2018-11-22 22:22:39,791 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2018-11-22 22:22:39,791 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 [2018-11-22 22:22:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2018-11-22 22:22:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2018-11-22 22:22:39,792 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2018-11-22 22:22:39,792 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,792 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 22:22:39,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:39,814 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2018-11-22 22:22:39,814 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2018-11-22 22:22:39,819 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2018-11-22 22:22:39,820 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 [2018-11-22 22:22:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2018-11-22 22:22:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2018-11-22 22:22:39,821 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2018-11-22 22:22:39,821 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,821 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-22 22:22:39,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 22:22:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 22:22:39,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 22:22:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 22:22:39,839 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 1 loop predicates [2018-11-22 22:22:39,839 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2018-11-22 22:22:39,846 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 18 states and 20 transitions. Complement of second has 4 states. [2018-11-22 22:22:39,847 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 [2018-11-22 22:22:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2018-11-22 22:22:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2018-11-22 22:22:39,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 1 letters. [2018-11-22 22:22:39,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 15 letters. Loop has 1 letters. [2018-11-22 22:22:39,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,850 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 2 letters. [2018-11-22 22:22:39,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-22 22:22:39,851 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2018-11-22 22:22:39,851 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-22 22:22:39,851 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2018-11-22 22:22:39,851 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-22 22:22:39,851 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-22 22:22:39,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-22 22:22:39,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-22 22:22:39,852 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 22:22:39,852 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 22:22:39,852 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 22:22:39,852 INFO L442 BuchiCegarLoop]: ======== Iteration 13============ [2018-11-22 22:22:39,852 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-22 22:22:39,852 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-22 22:22:39,852 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-22 22:22:39,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.11 10:22:39 BoogieIcfgContainer [2018-11-22 22:22:39,858 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-22 22:22:39,858 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 22:22:39,859 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 22:22:39,859 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 22:22:39,859 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 10:22:37" (3/4) ... [2018-11-22 22:22:39,862 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-22 22:22:39,862 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 22:22:39,865 INFO L168 Benchmark]: Toolchain (without parser) took 2476.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 211.3 MB). Free memory was 953.8 MB in the beginning and 1.2 GB in the end (delta: -216.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:22:39,866 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:22:39,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.14 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:22:39,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.14 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 22:22:39,867 INFO L168 Benchmark]: Boogie Preprocessor took 11.12 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:22:39,868 INFO L168 Benchmark]: RCFGBuilder took 148.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -176.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-22 22:22:39,868 INFO L168 Benchmark]: BuchiAutomizer took 2137.77 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 80.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -53.4 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2018-11-22 22:22:39,869 INFO L168 Benchmark]: Witness Printer took 3.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 22:22:39,871 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 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 151.14 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.14 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.12 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 148.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -176.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2137.77 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 80.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -53.4 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * Witness Printer took 3.59 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (9 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -2 * x1 + 21 and consists of 3 locations. One deterministic module has affine ranking function x2 and consists of 3 locations. One nondeterministic module has affine ranking function x2 and consists of 3 locations. 9 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.1s and 13 iterations. TraceHistogramMax:9. Analysis of lassos took 1.6s. Construction of modules took 0.1s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 10. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 10. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 45/45 HoareTripleCheckerStatistics: 62 SDtfs, 21 SDslu, 50 SDs, 0 SdLazy, 157 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI9 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax210 hnf100 lsp43 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 7ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...