./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 ff3652fa62b489d4e6a4a85c8349c06d13bd2232 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:01:32,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:01:32,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:01:32,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:01:32,533 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:01:32,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:01:32,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:01:32,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:01:32,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:01:32,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:01:32,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:01:32,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:01:32,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:01:32,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:01:32,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:01:32,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:01:32,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:01:32,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:01:32,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:01:32,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:01:32,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:01:32,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:01:32,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:01:32,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:01:32,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:01:32,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:01:32,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:01:32,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:01:32,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:01:32,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:01:32,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:01:32,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:01:32,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:01:32,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:01:32,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:01:32,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:01:32,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:01:32,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:01:32,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:01:32,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:01:32,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:01:32,556 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 14:01:32,566 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:01:32,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:01:32,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:01:32,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:01:32,568 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 14:01:32,568 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 14:01:32,568 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 14:01:32,568 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 14:01:32,568 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 14:01:32,568 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 14:01:32,568 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 14:01:32,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:01:32,569 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 14:01:32,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:01:32,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:01:32,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 14:01:32,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 14:01:32,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 14:01:32,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 14:01:32,570 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 14:01:32,570 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:01:32,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 14:01:32,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:01:32,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 14:01:32,570 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 14:01:32,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:01:32,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 14:01:32,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:01:32,571 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 14:01:32,571 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 14:01:32,571 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 -> ff3652fa62b489d4e6a4a85c8349c06d13bd2232 [2019-12-07 14:01:32,668 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:01:32,676 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:01:32,678 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:01:32,679 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:01:32,679 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:01:32,679 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c [2019-12-07 14:01:32,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/data/f25e05208/7b7a123a25d6481a9eb7a40f93855da9/FLAGa5d7c85f2 [2019-12-07 14:01:33,121 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:01:33,121 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-TACAS2011-Fig2.c [2019-12-07 14:01:33,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/data/f25e05208/7b7a123a25d6481a9eb7a40f93855da9/FLAGa5d7c85f2 [2019-12-07 14:01:33,498 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/data/f25e05208/7b7a123a25d6481a9eb7a40f93855da9 [2019-12-07 14:01:33,501 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:01:33,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:01:33,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:01:33,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:01:33,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:01:33,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0414ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33, skipping insertion in model container [2019-12-07 14:01:33,508 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:01:33,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:01:33,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:01:33,619 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:01:33,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:01:33,669 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:01:33,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33 WrapperNode [2019-12-07 14:01:33,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:01:33,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:01:33,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:01:33,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:01:33,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:01:33,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:01:33,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:01:33,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:01:33,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... [2019-12-07 14:01:33,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:01:33,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:01:33,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:01:33,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:01:33,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:33,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:01:33,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:01:33,834 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:01:33,835 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-07 14:01:33,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:01:33 BoogieIcfgContainer [2019-12-07 14:01:33,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:01:33,836 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 14:01:33,836 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 14:01:33,838 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 14:01:33,839 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 14:01:33,839 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 02:01:33" (1/3) ... [2019-12-07 14:01:33,840 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@56985b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 02:01:33, skipping insertion in model container [2019-12-07 14:01:33,840 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 14:01:33,840 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:01:33" (2/3) ... [2019-12-07 14:01:33,840 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@56985b44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 02:01:33, skipping insertion in model container [2019-12-07 14:01:33,840 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 14:01:33,840 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:01:33" (3/3) ... [2019-12-07 14:01:33,841 INFO L371 chiAutomizerObserver]: Analyzing ICFG PodelskiRybalchenko-TACAS2011-Fig2.c [2019-12-07 14:01:33,872 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 14:01:33,872 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 14:01:33,872 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 14:01:33,872 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:01:33,872 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:01:33,872 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 14:01:33,872 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:01:33,872 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 14:01:33,882 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-12-07 14:01:33,897 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 14:01:33,897 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:01:33,897 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:01:33,901 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 14:01:33,901 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 14:01:33,901 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 14:01:33,902 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-12-07 14:01:33,902 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-12-07 14:01:33,902 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:01:33,903 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:01:33,903 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-12-07 14:01:33,903 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 14:01:33,908 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 3#L17-2true [2019-12-07 14:01:33,908 INFO L796 eck$LassoCheckResult]: Loop: 3#L17-2true assume !!(main_~x~0 >= 0);main_~y~0 := 1; 6#L19-2true assume !(main_~y~0 < main_~x~0); 5#L19-3true main_~x~0 := main_~x~0 - 1; 3#L17-2true [2019-12-07 14:01:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:33,912 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-12-07 14:01:33,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:01:33,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692061899] [2019-12-07 14:01:33,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:01:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:33,987 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:01:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:33,988 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2019-12-07 14:01:33,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:01:33,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274933414] [2019-12-07 14:01:33,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:01:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,001 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:01:34,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:34,003 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2019-12-07 14:01:34,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:01:34,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564413568] [2019-12-07 14:01:34,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:01:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,015 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:01:34,053 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:01:34,053 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:01:34,053 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:01:34,053 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:01:34,053 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:01:34,054 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,054 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:01:34,054 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:01:34,054 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration1_Loop [2019-12-07 14:01:34,054 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:01:34,054 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:01:34,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,149 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:01:34,150 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,154 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:01:34,154 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:01:34,161 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:01:34,161 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,165 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:01:34,165 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:01:34,168 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:01:34,169 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,172 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:01:34,172 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,179 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:01:34,179 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:01:34,189 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:01:34,190 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:01:34,190 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:01:34,190 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:01:34,190 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:01:34,190 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:01:34,190 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,190 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:01:34,190 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:01:34,190 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration1_Loop [2019-12-07 14:01:34,190 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:01:34,190 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:01:34,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,246 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:01:34,250 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,254 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 14:01:34,256 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:01:34,256 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:01:34,256 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:01:34,256 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:01:34,257 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:01:34,259 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:01:34,259 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:01:34,262 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:01:34,266 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 14:01:34,266 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,270 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:01:34,270 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:01:34,270 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:01:34,271 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2019-12-07 14:01:34,274 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:01:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:34,299 INFO L264 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:01:34,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:34,306 WARN L262 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:01:34,307 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:01:34,327 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2019-12-07 14:01:34,327 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2019-12-07 14:01:34,358 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 23 states and 35 transitions. Complement of second has 7 states. [2019-12-07 14:01:34,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 14:01:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-12-07 14:01:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2019-12-07 14:01:34,360 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 1 letters. Loop has 3 letters. [2019-12-07 14:01:34,361 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:34,361 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 4 letters. Loop has 3 letters. [2019-12-07 14:01:34,361 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:34,361 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 1 letters. Loop has 6 letters. [2019-12-07 14:01:34,362 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:34,362 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 35 transitions. [2019-12-07 14:01:34,364 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 14:01:34,366 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2019-12-07 14:01:34,367 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2019-12-07 14:01:34,367 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2019-12-07 14:01:34,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2019-12-07 14:01:34,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:01:34,368 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-12-07 14:01:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2019-12-07 14:01:34,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2019-12-07 14:01:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-12-07 14:01:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 9 transitions. [2019-12-07 14:01:34,384 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-12-07 14:01:34,384 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 9 transitions. [2019-12-07 14:01:34,384 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 14:01:34,384 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 9 transitions. [2019-12-07 14:01:34,385 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 14:01:34,385 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:01:34,385 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:01:34,385 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 14:01:34,385 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-12-07 14:01:34,385 INFO L794 eck$LassoCheckResult]: Stem: 74#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 70#L17-2 assume !!(main_~x~0 >= 0);main_~y~0 := 1; 72#L19-2 [2019-12-07 14:01:34,386 INFO L796 eck$LassoCheckResult]: Loop: 72#L19-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 72#L19-2 [2019-12-07 14:01:34,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-12-07 14:01:34,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:01:34,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909824482] [2019-12-07 14:01:34,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:01:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,391 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:01:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2019-12-07 14:01:34,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:01:34,391 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662224750] [2019-12-07 14:01:34,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:01:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,396 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:01:34,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:34,396 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2019-12-07 14:01:34,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:01:34,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669806786] [2019-12-07 14:01:34,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:01:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,402 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:01:34,409 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:01:34,409 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:01:34,409 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:01:34,410 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:01:34,410 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:01:34,410 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,410 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:01:34,410 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:01:34,410 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration2_Loop [2019-12-07 14:01:34,410 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:01:34,410 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:01:34,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,446 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:01:34,446 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,449 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:01:34,449 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:01:34,453 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:01:34,453 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:01:34,457 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:34,462 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:01:34,462 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:01:34,592 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:01:34,593 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:01:34,593 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:01:34,593 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:01:34,593 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:01:34,593 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:01:34,594 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,594 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:01:34,594 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:01:34,594 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration2_Loop [2019-12-07 14:01:34,594 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:01:34,594 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:01:34,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,626 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:01:34,626 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:34,629 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 14:01:34,630 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:01:34,630 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:01:34,630 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:01:34,631 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:01:34,633 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 14:01:34,633 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 14:01:34,637 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:34,642 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 14:01:34,644 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:01:34,644 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:01:34,644 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:01:34,644 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:01:34,644 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:01:34,645 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:01:34,645 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:01:34,647 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:01:34,651 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-12-07 14:01:34,651 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:34,654 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:01:34,654 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:01:34,654 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:01:34,654 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2019-12-07 14:01:34,656 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:01:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:34,674 INFO L264 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:01:34,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:34,680 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:01:34,680 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:01:34,680 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-12-07 14:01:34,680 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 9 transitions. cyclomatic complexity: 5 Second operand 2 states. [2019-12-07 14:01:34,692 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 9 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 13 states and 18 transitions. Complement of second has 5 states. [2019-12-07 14:01:34,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:01:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 14:01:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 14:01:34,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2019-12-07 14:01:34,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:34,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2019-12-07 14:01:34,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:34,693 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2019-12-07 14:01:34,693 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:34,694 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 18 transitions. [2019-12-07 14:01:34,694 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 14:01:34,695 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 13 transitions. [2019-12-07 14:01:34,695 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2019-12-07 14:01:34,695 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2019-12-07 14:01:34,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 13 transitions. [2019-12-07 14:01:34,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:01:34,695 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2019-12-07 14:01:34,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 13 transitions. [2019-12-07 14:01:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2019-12-07 14:01:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-12-07 14:01:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2019-12-07 14:01:34,696 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-12-07 14:01:34,696 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-12-07 14:01:34,696 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 14:01:34,696 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2019-12-07 14:01:34,697 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-12-07 14:01:34,697 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:01:34,697 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:01:34,697 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2019-12-07 14:01:34,697 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-12-07 14:01:34,697 INFO L794 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 118#L17-2 assume !!(main_~x~0 >= 0);main_~y~0 := 1; 119#L19-2 assume !(main_~y~0 < main_~x~0); 123#L19-3 main_~x~0 := main_~x~0 - 1; 120#L17-2 assume !!(main_~x~0 >= 0);main_~y~0 := 1; 121#L19-2 [2019-12-07 14:01:34,697 INFO L796 eck$LassoCheckResult]: Loop: 121#L19-2 assume !!(main_~y~0 < main_~x~0);main_~y~0 := 1 + main_~y~0; 121#L19-2 [2019-12-07 14:01:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:34,698 INFO L82 PathProgramCache]: Analyzing trace with hash 29867642, now seen corresponding path program 2 times [2019-12-07 14:01:34,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:01:34,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578478330] [2019-12-07 14:01:34,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:01:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,705 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:01:34,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:34,705 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2019-12-07 14:01:34,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:01:34,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157382036] [2019-12-07 14:01:34,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:01:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:01:34,710 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:01:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:34,710 INFO L82 PathProgramCache]: Analyzing trace with hash 925896921, now seen corresponding path program 1 times [2019-12-07 14:01:34,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:01:34,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735937118] [2019-12-07 14:01:34,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:01:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:01:34,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735937118] [2019-12-07 14:01:34,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337962802] [2019-12-07 14:01:34,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:01:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:34,775 INFO L264 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 14:01:34,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:01:34,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:01:34,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-07 14:01:34,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305403266] [2019-12-07 14:01:34,802 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:01:34,802 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:01:34,802 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:01:34,802 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:01:34,802 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:01:34,802 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,802 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:01:34,803 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:01:34,803 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration3_Loop [2019-12-07 14:01:34,803 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:01:34,803 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:01:34,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,834 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:01:34,834 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:34,837 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:01:34,837 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:01:34,840 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:01:34,841 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:34,845 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:01:34,845 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:01:34,849 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:01:34,849 INFO L440 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/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:34,853 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:01:34,853 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:34,859 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:01:34,859 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:01:34,992 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:01:34,993 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:01:34,993 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:01:34,993 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:01:34,993 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:01:34,993 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:01:34,993 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:34,994 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:01:34,994 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:01:34,994 INFO L133 ssoRankerPreferences]: Filename of dumped script: PodelskiRybalchenko-TACAS2011-Fig2.c_Iteration3_Loop [2019-12-07 14:01:34,994 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:01:34,994 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:01:34,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:34,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:01:35,026 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:01:35,027 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:35,030 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 14:01:35,031 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:01:35,032 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:01:35,032 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:01:35,032 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:01:35,035 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 14:01:35,035 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 14:01:35,039 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:35,044 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 14:01:35,045 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:01:35,046 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:01:35,046 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:01:35,046 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:01:35,048 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-12-07 14:01:35,048 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-12-07 14:01:35,051 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/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 [2019-12-07 14:01:35,056 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-12-07 14:01:35,057 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:01:35,057 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:01:35,058 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:01:35,058 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:01:35,058 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:01:35,059 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:01:35,059 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:01:35,061 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:01:35,065 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-12-07 14:01:35,065 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70a2338a-1a93-403d-b664-7c7d0234c708/bin/uautomizer/z3 Starting monitored process 22 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:01:35,068 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:01:35,068 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:01:35,068 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:01:35,069 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~x~0) = -1*ULTIMATE.start_main_~y~0 + 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2019-12-07 14:01:35,071 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:01:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:35,085 INFO L264 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:01:35,085 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:35,088 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:01:35,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:01:35,088 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-12-07 14:01:35,089 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-12-07 14:01:35,098 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 11 states and 15 transitions. Complement of second has 5 states. [2019-12-07 14:01:35,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:01:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 14:01:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 14:01:35,098 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 1 letters. [2019-12-07 14:01:35,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:35,099 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 14:01:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:35,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:01:35,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:35,114 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:01:35,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:01:35,115 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 [2019-12-07 14:01:35,115 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-12-07 14:01:35,121 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 11 states and 15 transitions. Complement of second has 5 states. [2019-12-07 14:01:35,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:01:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 14:01:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-12-07 14:01:35,122 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 5 letters. Loop has 1 letters. [2019-12-07 14:01:35,122 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:35,122 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 14:01:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:01:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:35,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2019-12-07 14:01:35,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:01:35,141 WARN L262 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:01:35,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:01:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:01:35,141 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 [2019-12-07 14:01:35,141 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-12-07 14:01:35,150 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 9 states and 11 transitions. Complement of second has 4 states. [2019-12-07 14:01:35,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:01:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-12-07 14:01:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-12-07 14:01:35,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 1 letters. [2019-12-07 14:01:35,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:35,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2019-12-07 14:01:35,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:35,151 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2019-12-07 14:01:35,151 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:01:35,152 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 11 transitions. [2019-12-07 14:01:35,152 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 14:01:35,152 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 0 states and 0 transitions. [2019-12-07 14:01:35,152 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 14:01:35,152 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 14:01:35,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 14:01:35,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 14:01:35,153 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:01:35,153 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:01:35,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:01:35,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:01:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:01:35,156 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 7 states. [2019-12-07 14:01:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:01:35,157 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-12-07 14:01:35,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 14:01:35,158 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-12-07 14:01:35,158 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 14:01:35,158 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 14:01:35,158 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 14:01:35,158 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 14:01:35,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 14:01:35,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 14:01:35,158 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:01:35,158 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:01:35,158 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:01:35,158 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 14:01:35,159 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-12-07 14:01:35,159 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 14:01:35,159 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-12-07 14:01:35,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 02:01:35 BoogieIcfgContainer [2019-12-07 14:01:35,163 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 14:01:35,163 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:01:35,163 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:01:35,163 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:01:35,164 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:01:33" (3/4) ... [2019-12-07 14:01:35,166 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 14:01:35,166 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:01:35,167 INFO L168 Benchmark]: Toolchain (without parser) took 1665.08 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.4 MB). Free memory was 946.2 MB in the beginning and 853.2 MB in the end (delta: 93.0 MB). Peak memory consumption was 187.4 MB. Max. memory is 11.5 GB. [2019-12-07 14:01:35,168 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:01:35,168 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.81 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -145.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:01:35,169 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:01:35,169 INFO L168 Benchmark]: Boogie Preprocessor took 12.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:01:35,169 INFO L168 Benchmark]: RCFGBuilder took 132.70 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2019-12-07 14:01:35,170 INFO L168 Benchmark]: BuchiAutomizer took 1326.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 853.2 MB in the end (delta: 218.3 MB). Peak memory consumption was 218.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:01:35,170 INFO L168 Benchmark]: Witness Printer took 2.78 ms. Allocated memory is still 1.1 GB. Free memory is still 853.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:01:35,173 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 166.81 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.4 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -145.6 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.80 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 132.70 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1326.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 853.2 MB in the end (delta: 218.3 MB). Peak memory consumption was 218.3 MB. Max. memory is 11.5 GB. * Witness Printer took 2.78 ms. Allocated memory is still 1.1 GB. Free memory is still 853.2 MB. 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 4 terminating modules (1 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 2 * x + 1 and consists of 5 locations. One deterministic module has affine ranking function -1 * y + x and consists of 3 locations. One nondeterministic module has affine ranking function -1 * y + x and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 7 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.2s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 1.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 6 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 15 SDtfs, 21 SDslu, 6 SDs, 0 SdLazy, 39 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax203 hnf98 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf111 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 10ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...