./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 6c09c2a46ed7454ea61f3b2ddb99e3e2ba9fd4da .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 19:46:33,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 19:46:33,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 19:46:33,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 19:46:33,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 19:46:33,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 19:46:33,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 19:46:33,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 19:46:33,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 19:46:33,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 19:46:33,929 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 19:46:33,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 19:46:33,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 19:46:33,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 19:46:33,936 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 19:46:33,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 19:46:33,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 19:46:33,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 19:46:33,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 19:46:33,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 19:46:33,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 19:46:33,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 19:46:33,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 19:46:33,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 19:46:33,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 19:46:33,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 19:46:33,959 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 19:46:33,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 19:46:33,961 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 19:46:33,971 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 19:46:33,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 19:46:33,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 19:46:33,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 19:46:33,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 19:46:33,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 19:46:33,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 19:46:33,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 19:46:33,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 19:46:33,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 19:46:33,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 19:46:33,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 19:46:33,978 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-15 19:46:34,005 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 19:46:34,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 19:46:34,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 19:46:34,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 19:46:34,016 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 19:46:34,017 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-15 19:46:34,017 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-15 19:46:34,017 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-15 19:46:34,017 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-15 19:46:34,017 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-15 19:46:34,018 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-15 19:46:34,018 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 19:46:34,018 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-15 19:46:34,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 19:46:34,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 19:46:34,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-15 19:46:34,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-15 19:46:34,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-15 19:46:34,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 19:46:34,019 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-15 19:46:34,020 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 19:46:34,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-15 19:46:34,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 19:46:34,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 19:46:34,021 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-15 19:46:34,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 19:46:34,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 19:46:34,021 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-15 19:46:34,022 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-15 19:46:34,022 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_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 -> 6c09c2a46ed7454ea61f3b2ddb99e3e2ba9fd4da [2019-11-15 19:46:34,058 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 19:46:34,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 19:46:34,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 19:46:34,078 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 19:46:34,079 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 19:46:34,080 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1.c [2019-11-15 19:46:34,140 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/data/d57e57bea/ecea5024f01b49a6806f8403f362335e/FLAGce02d5a0e [2019-11-15 19:46:34,549 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 19:46:34,550 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/sv-benchmarks/c/termination-crafted-lit/BradleyMannaSipma-CAV2005-Fig1.c [2019-11-15 19:46:34,555 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/data/d57e57bea/ecea5024f01b49a6806f8403f362335e/FLAGce02d5a0e [2019-11-15 19:46:34,953 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/data/d57e57bea/ecea5024f01b49a6806f8403f362335e [2019-11-15 19:46:34,956 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 19:46:34,957 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 19:46:34,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 19:46:34,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 19:46:34,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 19:46:34,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 07:46:34" (1/1) ... [2019-11-15 19:46:34,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5408eeba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:34, skipping insertion in model container [2019-11-15 19:46:34,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 07:46:34" (1/1) ... [2019-11-15 19:46:34,977 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 19:46:34,991 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 19:46:35,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 19:46:35,255 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 19:46:35,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 19:46:35,288 INFO L192 MainTranslator]: Completed translation [2019-11-15 19:46:35,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35 WrapperNode [2019-11-15 19:46:35,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 19:46:35,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 19:46:35,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 19:46:35,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 19:46:35,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... [2019-11-15 19:46:35,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... [2019-11-15 19:46:35,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 19:46:35,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 19:46:35,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 19:46:35,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 19:46:35,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... [2019-11-15 19:46:35,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... [2019-11-15 19:46:35,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... [2019-11-15 19:46:35,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... [2019-11-15 19:46:35,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... [2019-11-15 19:46:35,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... [2019-11-15 19:46:35,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... [2019-11-15 19:46:35,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 19:46:35,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 19:46:35,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 19:46:35,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 19:46:35,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 19:46:35,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 19:46:35,535 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 19:46:35,535 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-15 19:46:35,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 07:46:35 BoogieIcfgContainer [2019-11-15 19:46:35,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 19:46:35,536 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-15 19:46:35,537 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-15 19:46:35,539 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-15 19:46:35,540 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-15 19:46:35,541 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.11 07:46:34" (1/3) ... [2019-11-15 19:46:35,542 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6d1a8ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.11 07:46:35, skipping insertion in model container [2019-11-15 19:46:35,542 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-15 19:46:35,542 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 07:46:35" (2/3) ... [2019-11-15 19:46:35,543 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6d1a8ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.11 07:46:35, skipping insertion in model container [2019-11-15 19:46:35,543 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-15 19:46:35,543 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 07:46:35" (3/3) ... [2019-11-15 19:46:35,544 INFO L371 chiAutomizerObserver]: Analyzing ICFG BradleyMannaSipma-CAV2005-Fig1.c [2019-11-15 19:46:35,632 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-15 19:46:35,632 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-15 19:46:35,633 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-15 19:46:35,633 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 19:46:35,633 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 19:46:35,633 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-15 19:46:35,633 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 19:46:35,633 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-15 19:46:35,651 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-15 19:46:35,701 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-15 19:46:35,701 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 19:46:35,701 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 19:46:35,707 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-15 19:46:35,707 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-15 19:46:35,707 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-15 19:46:35,708 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-15 19:46:35,708 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-15 19:46:35,709 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 19:46:35,709 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 19:46:35,709 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-15 19:46:35,709 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-15 19:46:35,716 INFO L791 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~y1~0, main_~y2~0;havoc main_~y1~0;havoc main_~y2~0;main_~y1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y2~0 := main_#t~nondet1;havoc main_#t~nondet1; 7#L18true assume main_~y1~0 > 0 && main_~y2~0 > 0; 8#L20-2true [2019-11-15 19:46:35,717 INFO L793 eck$LassoCheckResult]: Loop: 8#L20-2true assume !!(main_~y1~0 != main_~y2~0); 10#L20true assume main_~y1~0 > main_~y2~0;main_~y1~0 := main_~y1~0 - main_~y2~0; 8#L20-2true [2019-11-15 19:46:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2019-11-15 19:46:35,730 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:35,731 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453536109] [2019-11-15 19:46:35,731 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:35,731 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:35,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:35,834 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:35,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1380, now seen corresponding path program 1 times [2019-11-15 19:46:35,835 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:35,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925635984] [2019-11-15 19:46:35,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:35,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:35,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:35,861 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash 957575, now seen corresponding path program 1 times [2019-11-15 19:46:35,863 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:35,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37701084] [2019-11-15 19:46:35,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:35,864 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:35,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:35,876 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:35,978 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:35,978 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:35,979 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:35,979 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:35,979 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 19:46:35,979 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:35,979 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:35,979 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:35,980 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration1_Lasso [2019-11-15 19:46:35,980 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:35,980 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:35,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,002 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,019 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,028 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,164 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:36,165 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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) [2019-11-15 19:46:36,227 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:36,227 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:36,235 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:36,235 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet0=0} Honda state: {ULTIMATE.start_main_#t~nondet0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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) [2019-11-15 19:46:36,250 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:36,250 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:36,268 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 19:46:36,269 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:36,397 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 19:46:36,399 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:36,399 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:36,399 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:36,399 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:36,399 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 19:46:36,399 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:36,399 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:36,400 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:36,400 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration1_Lasso [2019-11-15 19:46:36,400 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:36,400 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:36,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:36,527 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:36,532 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 19:46:36,536 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:36,538 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:36,538 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:36,539 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:36,540 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:36,555 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:36,556 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:36,634 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 19:46:36,665 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2019-11-15 19:46:36,665 INFO L444 ModelExtractionUtils]: 4 out of 10 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-11-15 19:46:36,668 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 19:46:36,671 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2019-11-15 19:46:36,672 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 19:46:36,673 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y2~0, ULTIMATE.start_main_~y1~0) = -1*ULTIMATE.start_main_~y2~0 + 1*ULTIMATE.start_main_~y1~0 Supporting invariants [1*ULTIMATE.start_main_~y2~0 - 1 >= 0] [2019-11-15 19:46:36,682 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-15 19:46:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:36,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 19:46:36,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:36,763 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:36,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:36,781 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-11-15 19:46:36,782 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 3 states. [2019-11-15 19:46:36,859 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 3 states. Result 28 states and 35 transitions. Complement of second has 6 states. [2019-11-15 19:46:36,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-15 19:46:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2019-11-15 19:46:36,865 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 2 letters. Loop has 2 letters. [2019-11-15 19:46:36,867 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:36,867 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-15 19:46:36,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:36,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-15 19:46:36,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:36,869 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 35 transitions. [2019-11-15 19:46:36,875 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-15 19:46:36,880 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 8 states and 11 transitions. [2019-11-15 19:46:36,881 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-11-15 19:46:36,881 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-11-15 19:46:36,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2019-11-15 19:46:36,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 19:46:36,882 INFO L688 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-11-15 19:46:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2019-11-15 19:46:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-15 19:46:36,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-15 19:46:36,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2019-11-15 19:46:36,908 INFO L711 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-11-15 19:46:36,908 INFO L591 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-11-15 19:46:36,908 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-15 19:46:36,908 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2019-11-15 19:46:36,909 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-15 19:46:36,909 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 19:46:36,910 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 19:46:36,910 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-15 19:46:36,910 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-15 19:46:36,911 INFO L791 eck$LassoCheckResult]: Stem: 81#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~y1~0, main_~y2~0;havoc main_~y1~0;havoc main_~y2~0;main_~y1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y2~0 := main_#t~nondet1;havoc main_#t~nondet1; 82#L18 assume main_~y1~0 > 0 && main_~y2~0 > 0; 88#L20-2 assume !!(main_~y1~0 != main_~y2~0); 87#L20 assume !(main_~y1~0 > main_~y2~0);main_~y2~0 := main_~y2~0 - main_~y1~0; 83#L20-2 [2019-11-15 19:46:36,911 INFO L793 eck$LassoCheckResult]: Loop: 83#L20-2 assume !!(main_~y1~0 != main_~y2~0); 84#L20 assume main_~y1~0 > main_~y2~0;main_~y1~0 := main_~y1~0 - main_~y2~0; 83#L20-2 [2019-11-15 19:46:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash 957577, now seen corresponding path program 1 times [2019-11-15 19:46:36,912 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:36,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280172536] [2019-11-15 19:46:36,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:36,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:36,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:36,947 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:36,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1380, now seen corresponding path program 2 times [2019-11-15 19:46:36,949 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:36,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434588949] [2019-11-15 19:46:36,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:36,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:36,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:36,962 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:36,966 INFO L82 PathProgramCache]: Analyzing trace with hash 920231916, now seen corresponding path program 1 times [2019-11-15 19:46:36,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:36,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428394913] [2019-11-15 19:46:36,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:36,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:36,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:36,990 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:37,043 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:37,043 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:37,043 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:37,044 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:37,044 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 19:46:37,044 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:37,044 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:37,044 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:37,044 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration2_Lasso [2019-11-15 19:46:37,044 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:37,044 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:37,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,075 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,158 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:37,158 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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) [2019-11-15 19:46:37,162 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:37,162 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:37,166 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:37,167 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_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:37,173 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:37,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:37,176 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:37,176 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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) [2019-11-15 19:46:37,195 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:37,196 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:37,222 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 19:46:37,223 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:37,384 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 19:46:37,386 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:37,386 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:37,386 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:37,386 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:37,386 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 19:46:37,386 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:37,387 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:37,387 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:37,387 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration2_Lasso [2019-11-15 19:46:37,387 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:37,387 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:37,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,495 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:37,495 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 19:46:37,495 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:37,496 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:37,496 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:37,496 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:37,496 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:37,498 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:37,498 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:37,502 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:37,512 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:37,512 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:37,514 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:37,515 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:37,515 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:37,515 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:37,516 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 19:46:37,518 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:37,519 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:37,520 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:37,521 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:37,522 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:37,522 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:37,522 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:37,524 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:37,526 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:37,562 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 19:46:37,606 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2019-11-15 19:46:37,607 INFO L444 ModelExtractionUtils]: 2 out of 10 variables were initially zero. Simplification set additionally 3 variables to zero. [2019-11-15 19:46:37,607 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 19:46:37,611 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2019-11-15 19:46:37,612 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 19:46:37,612 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y1~0) = 1*ULTIMATE.start_main_~y1~0 Supporting invariants [1*ULTIMATE.start_main_~y2~0 - 1 >= 0] [2019-11-15 19:46:37,614 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-15 19:46:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:37,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:37,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:37,674 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:37,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:37,676 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2019-11-15 19:46:37,676 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 Second operand 4 states. [2019-11-15 19:46:37,719 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 12 states and 17 transitions. Complement of second has 6 states. [2019-11-15 19:46:37,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-15 19:46:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2019-11-15 19:46:37,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-15 19:46:37,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:37,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-15 19:46:37,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:37,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 4 letters. Loop has 4 letters. [2019-11-15 19:46:37,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:37,723 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 17 transitions. [2019-11-15 19:46:37,723 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-15 19:46:37,724 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 17 transitions. [2019-11-15 19:46:37,724 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-15 19:46:37,724 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-11-15 19:46:37,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 17 transitions. [2019-11-15 19:46:37,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 19:46:37,725 INFO L688 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2019-11-15 19:46:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 17 transitions. [2019-11-15 19:46:37,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-15 19:46:37,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-15 19:46:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2019-11-15 19:46:37,728 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2019-11-15 19:46:37,728 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2019-11-15 19:46:37,728 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-15 19:46:37,728 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 17 transitions. [2019-11-15 19:46:37,730 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-15 19:46:37,730 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 19:46:37,730 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 19:46:37,730 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1] [2019-11-15 19:46:37,731 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-15 19:46:37,731 INFO L791 eck$LassoCheckResult]: Stem: 151#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~y1~0, main_~y2~0;havoc main_~y1~0;havoc main_~y2~0;main_~y1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y2~0 := main_#t~nondet1;havoc main_#t~nondet1; 152#L18 assume main_~y1~0 > 0 && main_~y2~0 > 0; 153#L20-2 assume !!(main_~y1~0 != main_~y2~0); 158#L20 assume !(main_~y1~0 > main_~y2~0);main_~y2~0 := main_~y2~0 - main_~y1~0; 159#L20-2 assume !!(main_~y1~0 != main_~y2~0); 160#L20 assume !(main_~y1~0 > main_~y2~0);main_~y2~0 := main_~y2~0 - main_~y1~0; 154#L20-2 [2019-11-15 19:46:37,731 INFO L793 eck$LassoCheckResult]: Loop: 154#L20-2 assume !!(main_~y1~0 != main_~y2~0); 155#L20 assume main_~y1~0 > main_~y2~0;main_~y1~0 := main_~y1~0 - main_~y2~0; 154#L20-2 [2019-11-15 19:46:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:37,731 INFO L82 PathProgramCache]: Analyzing trace with hash 920231918, now seen corresponding path program 2 times [2019-11-15 19:46:37,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:37,732 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592619019] [2019-11-15 19:46:37,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:37,732 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:37,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:37,754 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:37,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1380, now seen corresponding path program 3 times [2019-11-15 19:46:37,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:37,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218657963] [2019-11-15 19:46:37,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:37,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:37,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:37,767 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:37,768 INFO L82 PathProgramCache]: Analyzing trace with hash -420389359, now seen corresponding path program 2 times [2019-11-15 19:46:37,768 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:37,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273729977] [2019-11-15 19:46:37,768 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:37,768 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:37,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:37,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:37,795 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:37,862 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:37,862 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:37,862 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:37,862 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:37,862 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 19:46:37,862 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:37,863 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:37,863 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:37,863 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration3_Lasso [2019-11-15 19:46:37,863 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:37,863 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:37,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:37,957 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:37,957 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:37,972 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:37,974 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:37,979 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:37,979 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet0=0} Honda state: {ULTIMATE.start_main_#t~nondet0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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) [2019-11-15 19:46:37,995 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:37,995 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:38,003 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:38,003 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_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:38,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:38,022 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:38,026 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:38,026 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet1=0} Honda state: {ULTIMATE.start_main_#t~nondet1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:38,050 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:38,051 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:38,055 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:38,056 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_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:38,070 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:38,072 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:38,081 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 19:46:38,081 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:38,200 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 19:46:38,202 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:38,202 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:38,202 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:38,202 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:38,202 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 19:46:38,203 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:38,203 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:38,203 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:38,203 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration3_Lasso [2019-11-15 19:46:38,203 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:38,203 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:38,204 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,298 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:38,298 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 19:46:38,299 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:38,299 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:38,299 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:38,300 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:38,300 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:38,300 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:38,300 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 19:46:38,300 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:38,301 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:38,301 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:38,302 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:38,302 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:38,302 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:38,302 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:38,302 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:38,302 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 19:46:38,302 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:38,303 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:38,303 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:38,304 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:38,304 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:38,304 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:38,304 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:38,305 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:38,305 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:38,308 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:38,309 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:38,309 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:38,309 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:38,310 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:38,310 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:38,311 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:38,311 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:38,314 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:38,315 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:38,315 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:38,315 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:38,316 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:38,316 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:38,317 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:38,317 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:38,328 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 19:46:38,337 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2019-11-15 19:46:38,338 INFO L444 ModelExtractionUtils]: 4 out of 10 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-11-15 19:46:38,338 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 19:46:38,339 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2019-11-15 19:46:38,340 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 19:46:38,340 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y2~0, ULTIMATE.start_main_~y1~0) = -1*ULTIMATE.start_main_~y2~0 + 1*ULTIMATE.start_main_~y1~0 Supporting invariants [1*ULTIMATE.start_main_~y2~0 - 1 >= 0] [2019-11-15 19:46:38,342 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-15 19:46:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:38,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:38,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:38,392 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:38,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:38,393 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2019-11-15 19:46:38,393 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8 Second operand 4 states. [2019-11-15 19:46:38,433 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 14 states and 21 transitions. Complement of second has 6 states. [2019-11-15 19:46:38,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:38,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-15 19:46:38,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2019-11-15 19:46:38,434 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-15 19:46:38,434 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:38,435 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-15 19:46:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:38,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:38,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:38,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:38,507 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:38,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:38,508 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 1 loop predicates [2019-11-15 19:46:38,508 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8 Second operand 4 states. [2019-11-15 19:46:38,546 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 14 states and 21 transitions. Complement of second has 6 states. [2019-11-15 19:46:38,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-15 19:46:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2019-11-15 19:46:38,548 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-15 19:46:38,548 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:38,548 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-15 19:46:38,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:38,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:38,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:38,600 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:38,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:38,601 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2019-11-15 19:46:38,601 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8 Second operand 4 states. [2019-11-15 19:46:38,634 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 16 states and 24 transitions. Complement of second has 5 states. [2019-11-15 19:46:38,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-15 19:46:38,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-11-15 19:46:38,635 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-15 19:46:38,636 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:38,636 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2019-11-15 19:46:38,636 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:38,636 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-15 19:46:38,636 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:38,636 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 24 transitions. [2019-11-15 19:46:38,637 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-15 19:46:38,638 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 14 states and 20 transitions. [2019-11-15 19:46:38,638 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-11-15 19:46:38,638 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-11-15 19:46:38,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 20 transitions. [2019-11-15 19:46:38,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 19:46:38,639 INFO L688 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-15 19:46:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 20 transitions. [2019-11-15 19:46:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 6. [2019-11-15 19:46:38,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-15 19:46:38,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2019-11-15 19:46:38,640 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-11-15 19:46:38,640 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-11-15 19:46:38,640 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-15 19:46:38,640 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2019-11-15 19:46:38,641 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-15 19:46:38,641 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 19:46:38,641 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 19:46:38,641 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-15 19:46:38,641 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-15 19:46:38,642 INFO L791 eck$LassoCheckResult]: Stem: 330#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~y1~0, main_~y2~0;havoc main_~y1~0;havoc main_~y2~0;main_~y1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y2~0 := main_#t~nondet1;havoc main_#t~nondet1; 331#L18 assume main_~y1~0 > 0 && main_~y2~0 > 0; 332#L20-2 [2019-11-15 19:46:38,642 INFO L793 eck$LassoCheckResult]: Loop: 332#L20-2 assume !!(main_~y1~0 != main_~y2~0); 334#L20 assume !(main_~y1~0 > main_~y2~0);main_~y2~0 := main_~y2~0 - main_~y1~0; 332#L20-2 [2019-11-15 19:46:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 2 times [2019-11-15 19:46:38,642 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:38,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019903407] [2019-11-15 19:46:38,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:38,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:38,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:38,649 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1382, now seen corresponding path program 1 times [2019-11-15 19:46:38,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:38,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184128119] [2019-11-15 19:46:38,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:38,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:38,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:38,657 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash 957577, now seen corresponding path program 3 times [2019-11-15 19:46:38,657 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:38,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833288609] [2019-11-15 19:46:38,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:38,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:38,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:38,664 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:38,694 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:38,694 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:38,694 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:38,695 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:38,695 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 19:46:38,695 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:38,695 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:38,695 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:38,695 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration4_Lasso [2019-11-15 19:46:38,695 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:38,695 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:38,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:38,799 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:38,799 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:38,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:38,835 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:38,839 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:38,839 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet0=0} Honda state: {ULTIMATE.start_main_#t~nondet0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:38,846 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:38,846 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:38,849 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:38,850 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:38,854 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:38,854 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:38,857 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:38,858 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_7=0} Honda state: {v_rep~unnamed0~0~false_7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:38,862 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:38,862 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:38,865 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:38,865 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet1=0} Honda state: {ULTIMATE.start_main_#t~nondet1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:38,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:38,870 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:38,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 19:46:38,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:38,999 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 19:46:39,001 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:39,002 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:39,002 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:39,002 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:39,002 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 19:46:39,002 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:39,002 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:39,002 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:39,003 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration4_Lasso [2019-11-15 19:46:39,003 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:39,003 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:39,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,010 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,018 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,020 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,104 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:39,104 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 19:46:39,104 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,105 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,105 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:39,105 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,105 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,105 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,106 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 19:46:39,106 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:39,106 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:39,107 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,107 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,107 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:39,107 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,107 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,107 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,108 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 19:46:39,108 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:39,108 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:39,108 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,109 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,109 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:39,109 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,109 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,109 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,110 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 19:46:39,110 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:39,110 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:39,110 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,111 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,111 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,111 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,111 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,112 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:39,112 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:39,114 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:39,114 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,115 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,115 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,115 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,115 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,116 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:39,117 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:39,128 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 19:46:39,135 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-15 19:46:39,135 INFO L444 ModelExtractionUtils]: 4 out of 10 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-11-15 19:46:39,136 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 19:46:39,137 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2019-11-15 19:46:39,137 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 19:46:39,137 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y1~0, ULTIMATE.start_main_~y2~0) = -1*ULTIMATE.start_main_~y1~0 + 1*ULTIMATE.start_main_~y2~0 Supporting invariants [1*ULTIMATE.start_main_~y1~0 - 1 >= 0] [2019-11-15 19:46:39,144 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-15 19:46:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:39,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 19:46:39,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:39,179 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:39,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:39,180 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-11-15 19:46:39,180 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-15 19:46:39,206 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 12 states and 18 transitions. Complement of second has 5 states. [2019-11-15 19:46:39,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-15 19:46:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2019-11-15 19:46:39,207 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 2 letters. Loop has 2 letters. [2019-11-15 19:46:39,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:39,207 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-15 19:46:39,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:39,207 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-15 19:46:39,208 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:39,208 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 18 transitions. [2019-11-15 19:46:39,208 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-15 19:46:39,209 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 10 states and 14 transitions. [2019-11-15 19:46:39,209 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-11-15 19:46:39,209 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-15 19:46:39,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 14 transitions. [2019-11-15 19:46:39,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 19:46:39,209 INFO L688 BuchiCegarLoop]: Abstraction has 10 states and 14 transitions. [2019-11-15 19:46:39,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 14 transitions. [2019-11-15 19:46:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-15 19:46:39,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-15 19:46:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2019-11-15 19:46:39,211 INFO L711 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2019-11-15 19:46:39,211 INFO L591 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2019-11-15 19:46:39,211 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-15 19:46:39,211 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 13 transitions. [2019-11-15 19:46:39,212 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-15 19:46:39,212 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 19:46:39,212 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 19:46:39,214 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2019-11-15 19:46:39,214 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-15 19:46:39,214 INFO L791 eck$LassoCheckResult]: Stem: 389#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~y1~0, main_~y2~0;havoc main_~y1~0;havoc main_~y2~0;main_~y1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y2~0 := main_#t~nondet1;havoc main_#t~nondet1; 390#L18 assume main_~y1~0 > 0 && main_~y2~0 > 0; 391#L20-2 assume !!(main_~y1~0 != main_~y2~0); 392#L20 assume main_~y1~0 > main_~y2~0;main_~y1~0 := main_~y1~0 - main_~y2~0; 397#L20-2 assume !!(main_~y1~0 != main_~y2~0); 395#L20 [2019-11-15 19:46:39,214 INFO L793 eck$LassoCheckResult]: Loop: 395#L20 assume !(main_~y1~0 > main_~y2~0);main_~y2~0 := main_~y2~0 - main_~y1~0; 396#L20-2 assume !!(main_~y1~0 != main_~y2~0); 395#L20 [2019-11-15 19:46:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash 29684838, now seen corresponding path program 2 times [2019-11-15 19:46:39,214 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:39,215 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384270767] [2019-11-15 19:46:39,215 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:39,215 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:39,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:39,220 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1532, now seen corresponding path program 2 times [2019-11-15 19:46:39,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:39,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421395506] [2019-11-15 19:46:39,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:39,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:39,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:39,225 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:39,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1537641183, now seen corresponding path program 3 times [2019-11-15 19:46:39,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:39,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196507762] [2019-11-15 19:46:39,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:39,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:39,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:39,232 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:39,277 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:39,278 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:39,278 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:39,278 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:39,278 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 19:46:39,278 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:39,278 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:39,278 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:39,279 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration5_Lasso [2019-11-15 19:46:39,279 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:39,279 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:39,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,377 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:39,377 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:39,390 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:39,391 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:39,395 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:39,395 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/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 [2019-11-15 19:46:39,400 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:39,400 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:39,403 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:39,403 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:39,411 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:39,412 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:39,418 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:39,418 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet1=0} Honda state: {ULTIMATE.start_main_#t~nondet1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:39,423 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:39,423 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:39,425 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:39,426 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet0=0} Honda state: {ULTIMATE.start_main_#t~nondet0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 25 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:39,429 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:39,430 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:39,432 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:39,433 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:39,437 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:39,437 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:39,446 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 19:46:39,446 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:39,698 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 19:46:39,699 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:39,700 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:39,700 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:39,700 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:39,700 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 19:46:39,700 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:39,700 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:39,700 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:39,700 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration5_Lasso [2019-11-15 19:46:39,700 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:39,700 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:39,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:39,816 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:39,816 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 19:46:39,816 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,817 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,817 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,817 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,817 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,818 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:39,818 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:39,820 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:39,820 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,821 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,821 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:39,821 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,821 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,821 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,821 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 19:46:39,822 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:39,822 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:39,822 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,823 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,823 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,823 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,823 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,824 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:39,824 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:39,826 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:39,827 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,827 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,827 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:39,827 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,827 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,828 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,828 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 19:46:39,828 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:39,828 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:39,829 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,829 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,829 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:39,829 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:39,829 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:39,829 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,830 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 19:46:39,830 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:39,830 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:39,830 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:39,831 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:39,831 INFO L202 nArgumentSynthesizer]: 2 stem disjuncts [2019-11-15 19:46:39,831 INFO L203 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-15 19:46:39,831 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:39,834 INFO L400 nArgumentSynthesizer]: We have 20 Motzkin's Theorem applications. [2019-11-15 19:46:39,834 INFO L401 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-11-15 19:46:39,952 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 19:46:39,993 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2019-11-15 19:46:39,993 INFO L444 ModelExtractionUtils]: 8 out of 16 variables were initially zero. Simplification set additionally 2 variables to zero. [2019-11-15 19:46:39,995 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 19:46:39,998 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-11-15 19:46:39,998 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 19:46:39,998 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y2~0, ULTIMATE.start_main_~y1~0) = 2*ULTIMATE.start_main_~y2~0 - 2*ULTIMATE.start_main_~y1~0 + 1 Supporting invariants [1*ULTIMATE.start_main_~y1~0 - 1 >= 0] [2019-11-15 19:46:40,006 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-15 19:46:40,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:40,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 19:46:40,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:40,085 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:40,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:40,102 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 2 loop predicates [2019-11-15 19:46:40,102 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-11-15 19:46:40,133 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 14 states and 18 transitions. Complement of second has 6 states. [2019-11-15 19:46:40,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:40,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-15 19:46:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 6 transitions. [2019-11-15 19:46:40,134 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2019-11-15 19:46:40,134 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:40,134 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-15 19:46:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:40,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 19:46:40,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:40,181 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:40,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:40,195 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 2 loop predicates [2019-11-15 19:46:40,195 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-11-15 19:46:40,234 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 11 states and 15 transitions. Complement of second has 6 states. [2019-11-15 19:46:40,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-15 19:46:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 5 transitions. [2019-11-15 19:46:40,236 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 5 transitions. Stem has 5 letters. Loop has 2 letters. [2019-11-15 19:46:40,236 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:40,236 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-15 19:46:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:40,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 19:46:40,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:40,278 WARN L254 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:40,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:40,303 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 2 loop predicates [2019-11-15 19:46:40,303 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-11-15 19:46:40,337 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 17 states and 21 transitions. Complement of second has 5 states. [2019-11-15 19:46:40,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-15 19:46:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 9 transitions. [2019-11-15 19:46:40,338 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 5 letters. Loop has 2 letters. [2019-11-15 19:46:40,339 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:40,339 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 7 letters. Loop has 2 letters. [2019-11-15 19:46:40,339 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:40,339 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 9 transitions. Stem has 5 letters. Loop has 4 letters. [2019-11-15 19:46:40,339 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:40,340 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 21 transitions. [2019-11-15 19:46:40,341 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-15 19:46:40,341 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 13 states and 17 transitions. [2019-11-15 19:46:40,341 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-11-15 19:46:40,341 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2019-11-15 19:46:40,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2019-11-15 19:46:40,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 19:46:40,342 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-11-15 19:46:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2019-11-15 19:46:40,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2019-11-15 19:46:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-15 19:46:40,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2019-11-15 19:46:40,344 INFO L711 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-11-15 19:46:40,344 INFO L591 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2019-11-15 19:46:40,344 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-15 19:46:40,344 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2019-11-15 19:46:40,344 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-15 19:46:40,344 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 19:46:40,345 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 19:46:40,345 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2019-11-15 19:46:40,345 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1] [2019-11-15 19:46:40,345 INFO L791 eck$LassoCheckResult]: Stem: 554#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~y1~0, main_~y2~0;havoc main_~y1~0;havoc main_~y2~0;main_~y1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y2~0 := main_#t~nondet1;havoc main_#t~nondet1; 555#L18 assume main_~y1~0 > 0 && main_~y2~0 > 0; 556#L20-2 assume !!(main_~y1~0 != main_~y2~0); 557#L20 assume main_~y1~0 > main_~y2~0;main_~y1~0 := main_~y1~0 - main_~y2~0; 561#L20-2 assume !!(main_~y1~0 != main_~y2~0); 560#L20 [2019-11-15 19:46:40,346 INFO L793 eck$LassoCheckResult]: Loop: 560#L20 assume !(main_~y1~0 > main_~y2~0);main_~y2~0 := main_~y2~0 - main_~y1~0; 559#L20-2 assume !!(main_~y1~0 != main_~y2~0); 557#L20 assume main_~y1~0 > main_~y2~0;main_~y1~0 := main_~y1~0 - main_~y2~0; 561#L20-2 assume !!(main_~y1~0 != main_~y2~0); 560#L20 [2019-11-15 19:46:40,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:40,346 INFO L82 PathProgramCache]: Analyzing trace with hash 29684838, now seen corresponding path program 3 times [2019-11-15 19:46:40,346 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:40,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667787841] [2019-11-15 19:46:40,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:40,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:40,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:40,352 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:40,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1472761, now seen corresponding path program 1 times [2019-11-15 19:46:40,353 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:40,353 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712743766] [2019-11-15 19:46:40,353 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:40,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:40,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:40,358 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:40,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:40,358 INFO L82 PathProgramCache]: Analyzing trace with hash -204426530, now seen corresponding path program 4 times [2019-11-15 19:46:40,359 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 19:46:40,359 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391828702] [2019-11-15 19:46:40,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:40,359 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 19:46:40,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 19:46:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 19:46:40,366 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 19:46:40,406 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:40,406 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:40,406 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:40,406 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:40,407 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 19:46:40,407 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:40,407 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:40,407 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:40,407 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration6_Loop [2019-11-15 19:46:40,407 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:40,407 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:40,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:40,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:40,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:40,519 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:40,519 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-15 19:46:40,527 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:40,527 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:40,532 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:40,532 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_11=0} Honda state: {v_rep~unnamed0~0~false_11=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-15 19:46:40,542 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:40,542 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:40,547 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 19:46:40,547 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_11=1} Honda state: {v_rep~unnamed0~0~true_11=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:40,551 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 19:46:40,551 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aa65f68-8403-45c4-93cc-c82d913b2ebd/bin/uautomizer/z3 Starting monitored process 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:40,559 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 19:46:40,559 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 19:46:40,912 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 19:46:40,914 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 19:46:40,914 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 19:46:40,914 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 19:46:40,914 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 19:46:40,914 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 19:46:40,914 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 19:46:40,915 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 19:46:40,915 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 19:46:40,915 INFO L131 ssoRankerPreferences]: Filename of dumped script: BradleyMannaSipma-CAV2005-Fig1.c_Iteration6_Loop [2019-11-15 19:46:40,915 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 19:46:40,915 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 19:46:40,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:40,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:40,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 19:46:41,018 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 19:46:41,018 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 19:46:41,018 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:41,019 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:41,019 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:41,019 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:41,019 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:41,020 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:41,020 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:41,022 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:41,022 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:41,023 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:41,023 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:41,023 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 19:46:41,023 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:41,024 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 19:46:41,024 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 19:46:41,025 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 19:46:41,025 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-15 19:46:41,025 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 19:46:41,026 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 19:46:41,026 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 19:46:41,026 INFO L203 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-15 19:46:41,026 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 19:46:41,026 INFO L400 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-11-15 19:46:41,027 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 19:46:41,032 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 19:46:41,035 INFO L443 ModelExtractionUtils]: Simplification made 5 calls to the SMT solver. [2019-11-15 19:46:41,036 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. [2019-11-15 19:46:41,036 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 19:46:41,036 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-15 19:46:41,037 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 19:46:41,037 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y2~0) = 1*ULTIMATE.start_main_~y2~0 Supporting invariants [] [2019-11-15 19:46:41,037 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-15 19:46:41,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 19:46:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:41,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 19:46:41,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 19:46:41,076 WARN L254 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-15 19:46:41,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 19:46:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 19:46:41,096 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-15 19:46:41,096 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 4 Second operand 4 states. [2019-11-15 19:46:41,120 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 4. Second operand 4 states. Result 27 states and 41 transitions. Complement of second has 6 states. [2019-11-15 19:46:41,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-15 19:46:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-15 19:46:41,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2019-11-15 19:46:41,121 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 5 letters. Loop has 4 letters. [2019-11-15 19:46:41,121 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:41,121 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 9 letters. Loop has 4 letters. [2019-11-15 19:46:41,122 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:41,122 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 5 letters. Loop has 8 letters. [2019-11-15 19:46:41,122 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 19:46:41,122 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 41 transitions. [2019-11-15 19:46:41,123 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-15 19:46:41,123 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 0 states and 0 transitions. [2019-11-15 19:46:41,123 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-15 19:46:41,123 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-15 19:46:41,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-15 19:46:41,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-15 19:46:41,124 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 19:46:41,124 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 19:46:41,124 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 19:46:41,124 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-15 19:46:41,124 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-15 19:46:41,124 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-15 19:46:41,124 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-15 19:46:41,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.11 07:46:41 BoogieIcfgContainer [2019-11-15 19:46:41,130 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-15 19:46:41,130 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 19:46:41,130 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 19:46:41,130 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 19:46:41,131 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 07:46:35" (3/4) ... [2019-11-15 19:46:41,133 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-15 19:46:41,133 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 19:46:41,135 INFO L168 Benchmark]: Toolchain (without parser) took 6177.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 215.0 MB). Free memory was 950.1 MB in the beginning and 893.8 MB in the end (delta: 56.3 MB). Peak memory consumption was 271.3 MB. Max. memory is 11.5 GB. [2019-11-15 19:46:41,136 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 19:46:41,136 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -181.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-15 19:46:41,137 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 19:46:41,137 INFO L168 Benchmark]: Boogie Preprocessor took 13.96 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 19:46:41,138 INFO L168 Benchmark]: RCFGBuilder took 200.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 11.5 GB. [2019-11-15 19:46:41,139 INFO L168 Benchmark]: BuchiAutomizer took 5593.34 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 893.8 MB in the end (delta: 220.8 MB). Peak memory consumption was 295.3 MB. Max. memory is 11.5 GB. [2019-11-15 19:46:41,140 INFO L168 Benchmark]: Witness Printer took 3.35 ms. Allocated memory is still 1.2 GB. Free memory is still 893.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 19:46:41,143 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 331.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -181.3 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.96 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 200.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5593.34 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 74.4 MB). Free memory was 1.1 GB in the beginning and 893.8 MB in the end (delta: 220.8 MB). Peak memory consumption was 295.3 MB. Max. memory is 11.5 GB. * Witness Printer took 3.35 ms. Allocated memory is still 1.2 GB. Free memory is still 893.8 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 6 terminating modules (0 trivial, 4 deterministic, 2 nondeterministic). One deterministic module has affine ranking function -1 * y2 + y1 and consists of 4 locations. One deterministic module has affine ranking function y1 and consists of 4 locations. One deterministic module has affine ranking function -1 * y1 + y2 and consists of 3 locations. One deterministic module has affine ranking function y2 and consists of 4 locations. One nondeterministic module has affine ranking function -1 * y2 + y1 and consists of 4 locations. One nondeterministic module has affine ranking function 2 * y2 + -2 * y1 + 1 and consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.5s and 7 iterations. TraceHistogramMax:2. Analysis of lassos took 4.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 14 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 12 states and ocurred in iteration 2. Nontrivial modules had stage [4, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 32 SDtfs, 45 SDslu, 3 SDs, 0 SdLazy, 97 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso5 LassoPreprocessingBenchmarks: Lassos: inital23 mio100 ax152 hnf92 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq153 hnf96 smp87 dnf123 smp96 tf100 neg95 sie124 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 167ms VariablesStem: 2 VariablesLoop: 3 DisjunctsStem: 2 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 20 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...