./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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 054e86c0b11592f66f6efc3e0f84c6f8bee49b59 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:27:17,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:27:17,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:27:17,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:27:17,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:27:17,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:27:17,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:27:17,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:27:17,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:27:17,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:27:17,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:27:17,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:27:17,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:27:17,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:27:17,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:27:17,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:27:17,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:27:17,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:27:17,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:27:17,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:27:17,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:27:17,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:27:17,566 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:27:17,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:27:17,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:27:17,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:27:17,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:27:17,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:27:17,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:27:17,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:27:17,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:27:17,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:27:17,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:27:17,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:27:17,582 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:27:17,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:27:17,583 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:27:17,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:27:17,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:27:17,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:27:17,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:27:17,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-12-01 15:27:17,646 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:27:17,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:27:17,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:27:17,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:27:17,650 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:27:17,651 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-12-01 15:27:17,651 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-12-01 15:27:17,651 INFO L138 SettingsManager]: * Use old map elimination=false [2020-12-01 15:27:17,651 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-12-01 15:27:17,652 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-12-01 15:27:17,653 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-12-01 15:27:17,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:27:17,654 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 15:27:17,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:27:17,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:27:17,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-12-01 15:27:17,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-12-01 15:27:17,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-12-01 15:27:17,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:27:17,656 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-12-01 15:27:17,656 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:27:17,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-12-01 15:27:17,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:27:17,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:27:17,657 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-12-01 15:27:17,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:27:17,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:27:17,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:27:17,659 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-12-01 15:27:17,660 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-12-01 15:27:17,660 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 054e86c0b11592f66f6efc3e0f84c6f8bee49b59 [2020-12-01 15:27:17,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:27:18,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:27:18,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:27:18,034 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:27:18,035 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:27:18,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c [2020-12-01 15:27:18,144 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/data/4f5879425/e2450eedbc864bfd97026d2f0b335e40/FLAG1689146be [2020-12-01 15:27:18,693 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:27:18,694 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/sv-benchmarks/c/termination-crafted/Nyala-2lex-2.c [2020-12-01 15:27:18,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/data/4f5879425/e2450eedbc864bfd97026d2f0b335e40/FLAG1689146be [2020-12-01 15:27:19,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/bin/uautomizer/data/4f5879425/e2450eedbc864bfd97026d2f0b335e40 [2020-12-01 15:27:19,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:27:19,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:27:19,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:27:19,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:27:19,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:27:19,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b159d08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19, skipping insertion in model container [2020-12-01 15:27:19,076 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:27:19,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:27:19,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:27:19,374 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:27:19,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:27:19,439 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:27:19,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19 WrapperNode [2020-12-01 15:27:19,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:27:19,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:27:19,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:27:19,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:27:19,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:27:19,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:27:19,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:27:19,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:27:19,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... [2020-12-01 15:27:19,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:27:19,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:27:19,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:27:19,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:27:19,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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 [2020-12-01 15:27:19,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:27:19,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:27:19,827 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:27:19,828 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-01 15:27:19,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:27:19 BoogieIcfgContainer [2020-12-01 15:27:19,830 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:27:19,831 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-12-01 15:27:19,832 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-12-01 15:27:19,836 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-12-01 15:27:19,837 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:27:19,839 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 01.12 03:27:19" (1/3) ... [2020-12-01 15:27:19,841 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@560aa865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 03:27:19, skipping insertion in model container [2020-12-01 15:27:19,841 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:27:19,841 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:27:19" (2/3) ... [2020-12-01 15:27:19,842 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@560aa865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 03:27:19, skipping insertion in model container [2020-12-01 15:27:19,842 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:27:19,842 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:27:19" (3/3) ... [2020-12-01 15:27:19,844 INFO L389 chiAutomizerObserver]: Analyzing ICFG Nyala-2lex-2.c [2020-12-01 15:27:19,902 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-12-01 15:27:19,902 INFO L360 BuchiCegarLoop]: Hoare is false [2020-12-01 15:27:19,903 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-12-01 15:27:19,903 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:27:19,903 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:27:19,903 INFO L364 BuchiCegarLoop]: Difference is false [2020-12-01 15:27:19,904 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:27:19,904 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-12-01 15:27:19,916 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-12-01 15:27:19,936 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-12-01 15:27:19,936 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:27:19,936 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:27:19,943 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-12-01 15:27:19,943 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-12-01 15:27:19,943 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-12-01 15:27:19,944 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-12-01 15:27:19,945 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-12-01 15:27:19,945 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:27:19,945 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:27:19,946 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-12-01 15:27:19,946 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-12-01 15:27:19,954 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 8#L21-2true [2020-12-01 15:27:19,955 INFO L796 eck$LassoCheckResult]: Loop: 8#L21-2true assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 4#L21true assume main_~y~0 < 0;main_~x~0 := main_~x~0 - 1;main_~y~0 := main_#t~nondet2;havoc main_#t~nondet2; 8#L21-2true [2020-12-01 15:27:19,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:19,962 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-12-01 15:27:19,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:19,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069579487] [2020-12-01 15:27:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:20,066 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:20,072 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:20,090 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2020-12-01 15:27:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:20,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94098197] [2020-12-01 15:27:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:20,109 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:20,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:20,118 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2020-12-01 15:27:20,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:20,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604484277] [2020-12-01 15:27:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:20,132 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:20,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:20,143 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:20,284 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:27:20,285 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:27:20,285 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:27:20,285 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:27:20,285 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:27:20,286 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:20,286 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:27:20,286 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:27:20,286 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration1_Loop [2020-12-01 15:27:20,286 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:27:20,287 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:27:20,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:20,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:20,322 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:20,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:20,516 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:27:20,517 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:20,529 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:27:20,530 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 [2020-12-01 15:27:20,553 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:27:20,553 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:20,602 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:27:20,603 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 [2020-12-01 15:27:20,629 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:27:20,630 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:20,702 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:27:20,702 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:20,722 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:27:20,722 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~y~0=0, ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_~y~0=0, ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:20,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:27:20,772 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:20,838 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:27:20,838 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:20,901 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:27:20,904 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:27:20,905 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:27:20,905 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:27:20,905 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:27:20,905 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:27:20,905 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:20,905 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:27:20,906 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:27:20,906 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration1_Loop [2020-12-01 15:27:20,906 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:27:20,906 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:27:20,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:20,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:20,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:20,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:21,073 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:27:21,078 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:21,084 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 [2020-12-01 15:27:21,087 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:27:21,087 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:27:21,088 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:27:21,088 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:27:21,095 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:27:21,095 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:21,123 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:21,169 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 [2020-12-01 15:27:21,171 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:27:21,171 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:27:21,172 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:27:21,172 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:27:21,177 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:27:21,177 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:21,188 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:21,237 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 [2020-12-01 15:27:21,240 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:27:21,240 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:27:21,240 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:27:21,241 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:27:21,241 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:27:21,243 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:27:21,244 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:21,254 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:21,300 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 [2020-12-01 15:27:21,303 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:27:21,303 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:27:21,303 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:27:21,303 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:27:21,303 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:27:21,305 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:27:21,305 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:21,321 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:27:21,326 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:27:21,326 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:21,336 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:27:21,336 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:27:21,336 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:27:21,337 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:21,377 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:27:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:21,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-01 15:27:21,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:27:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:21,502 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-12-01 15:27:21,503 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2020-12-01 15:27:21,596 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 28 states and 35 transitions. Complement of second has 7 states. [2020-12-01 15:27:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-12-01 15:27:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-12-01 15:27:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2020-12-01 15:27:21,601 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 1 letters. Loop has 2 letters. [2020-12-01 15:27:21,615 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:21,615 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 3 letters. Loop has 2 letters. [2020-12-01 15:27:21,615 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:21,616 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 1 letters. Loop has 4 letters. [2020-12-01 15:27:21,616 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:21,621 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 35 transitions. [2020-12-01 15:27:21,625 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-12-01 15:27:21,631 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 8 states and 11 transitions. [2020-12-01 15:27:21,632 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-12-01 15:27:21,633 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-12-01 15:27:21,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 11 transitions. [2020-12-01 15:27:21,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:27:21,635 INFO L692 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2020-12-01 15:27:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 11 transitions. [2020-12-01 15:27:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-12-01 15:27:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-01 15:27:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-12-01 15:27:21,667 INFO L715 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-12-01 15:27:21,668 INFO L595 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-12-01 15:27:21,668 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-12-01 15:27:21,668 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-12-01 15:27:21,671 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-12-01 15:27:21,671 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:27:21,672 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:27:21,672 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-12-01 15:27:21,672 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-12-01 15:27:21,673 INFO L794 eck$LassoCheckResult]: Stem: 76#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 77#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 71#L21 [2020-12-01 15:27:21,673 INFO L796 eck$LassoCheckResult]: Loop: 71#L21 assume !(main_~y~0 < 0); 72#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 71#L21 [2020-12-01 15:27:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-12-01 15:27:21,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:21,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301434078] [2020-12-01 15:27:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:21,687 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:21,702 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:21,707 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:21,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2020-12-01 15:27:21,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:21,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905620376] [2020-12-01 15:27:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:21,729 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:21,737 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:21,738 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:21,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:21,740 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 1 times [2020-12-01 15:27:21,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:21,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246430372] [2020-12-01 15:27:21,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:21,753 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:21,775 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:21,777 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:21,821 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:27:21,822 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:27:21,822 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:27:21,823 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:27:21,823 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:27:21,823 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:21,823 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:27:21,823 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:27:21,824 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration2_Loop [2020-12-01 15:27:21,824 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:27:21,824 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:27:21,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:21,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:21,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:21,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:21,974 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:27:21,974 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:21,982 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:27:21,982 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:22,006 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:27:22,006 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_c6047725-7212-4b56-85cf-f1011c79d974/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 [2020-12-01 15:27:22,049 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:27:22,053 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:27:22,069 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:27:22,070 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:22,114 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:27:22,114 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:22,137 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:27:22,138 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=0} Honda state: {ULTIMATE.start_main_~x~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:22,182 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:27:22,182 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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 [2020-12-01 15:27:22,250 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:27:22,253 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:27:22,317 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:27:22,320 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:27:22,320 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:27:22,320 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:27:22,320 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:27:22,321 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:27:22,321 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:22,321 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:27:22,321 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:27:22,321 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration2_Loop [2020-12-01 15:27:22,321 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:27:22,322 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:27:22,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:22,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:22,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:22,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:22,422 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:27:22,425 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:22,435 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 [2020-12-01 15:27:22,437 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:27:22,437 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:27:22,438 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:27:22,438 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:27:22,447 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:27:22,448 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:22,459 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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 [2020-12-01 15:27:22,484 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 [2020-12-01 15:27:22,486 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:27:22,486 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:27:22,486 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:27:22,486 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:27:22,490 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:27:22,490 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-12-01 15:27:22,526 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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 [2020-12-01 15:27:22,556 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 15:27:22,564 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:27:22,565 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:27:22,565 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:27:22,565 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:27:22,565 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:27:22,566 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:27:22,566 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:27:22,593 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:22,646 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 [2020-12-01 15:27:22,648 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:27:22,649 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:27:22,649 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:27:22,649 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:27:22,649 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:27:22,651 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:27:22,651 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:22,688 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:27:22,691 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:27:22,691 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:22,731 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:27:22,731 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:27:22,731 INFO L510 LassoAnalysis]: Proved termination. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:22,731 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] [2020-12-01 15:27:22,753 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:27:22,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:22,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-01 15:27:22,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:22,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:27:22,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:22,814 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-12-01 15:27:22,814 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-12-01 15:27:22,842 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 14 states and 19 transitions. Complement of second has 5 states. [2020-12-01 15:27:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-12-01 15:27:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-12-01 15:27:22,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2020-12-01 15:27:22,844 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 2 letters. Loop has 2 letters. [2020-12-01 15:27:22,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:22,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2020-12-01 15:27:22,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:22,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 2 letters. Loop has 4 letters. [2020-12-01 15:27:22,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:22,846 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 19 transitions. [2020-12-01 15:27:22,849 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-12-01 15:27:22,851 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 9 states and 12 transitions. [2020-12-01 15:27:22,851 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-12-01 15:27:22,851 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-12-01 15:27:22,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2020-12-01 15:27:22,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:27:22,852 INFO L692 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2020-12-01 15:27:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2020-12-01 15:27:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 7. [2020-12-01 15:27:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-01 15:27:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2020-12-01 15:27:22,854 INFO L715 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2020-12-01 15:27:22,854 INFO L595 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2020-12-01 15:27:22,855 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-12-01 15:27:22,855 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 9 transitions. [2020-12-01 15:27:22,856 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-12-01 15:27:22,856 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:27:22,856 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:27:22,857 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2020-12-01 15:27:22,857 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-12-01 15:27:22,857 INFO L794 eck$LassoCheckResult]: Stem: 130#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 131#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 127#L21 assume main_~y~0 < 0;main_~x~0 := main_~x~0 - 1;main_~y~0 := main_#t~nondet2;havoc main_#t~nondet2; 128#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 125#L21 [2020-12-01 15:27:22,859 INFO L796 eck$LassoCheckResult]: Loop: 125#L21 assume !(main_~y~0 < 0); 126#L21-2 assume !!(main_~x~0 >= 0 && main_~y~0 >= 0);main_~y~0 := main_~y~0 - 1; 125#L21 [2020-12-01 15:27:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:22,860 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2020-12-01 15:27:22,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:22,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096484490] [2020-12-01 15:27:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:22,878 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:22,893 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:22,898 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:22,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2020-12-01 15:27:22,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:22,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459261447] [2020-12-01 15:27:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:22,912 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:22,921 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:22,923 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 1 times [2020-12-01 15:27:22,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:27:22,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420343685] [2020-12-01 15:27:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:27:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:22,943 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:27:22,956 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:27:22,958 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:27:23,005 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:27:23,009 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:27:23,009 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:27:23,009 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:27:23,010 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:27:23,010 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:23,011 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:27:23,011 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:27:23,011 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration3_Loop [2020-12-01 15:27:23,011 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:27:23,012 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:27:23,014 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:23,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:23,028 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:23,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:23,101 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:27:23,101 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:23,110 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:27:23,110 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:23,180 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:27:23,180 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:23,241 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:27:23,243 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:27:23,243 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:27:23,243 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:27:23,243 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:27:23,244 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:27:23,244 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:23,244 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:27:23,244 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:27:23,244 INFO L133 ssoRankerPreferences]: Filename of dumped script: Nyala-2lex-2.c_Iteration3_Loop [2020-12-01 15:27:23,244 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:27:23,244 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:27:23,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:23,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:23,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:23,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:27:23,342 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:27:23,342 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:23,350 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 [2020-12-01 15:27:23,352 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:27:23,352 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:27:23,352 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:27:23,352 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:27:23,352 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:27:23,354 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:27:23,354 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:23,373 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:27:23,376 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:27:23,377 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6047725-7212-4b56-85cf-f1011c79d974/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) [2020-12-01 15:27:23,381 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:27:23,381 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:27:23,381 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:27:23,381 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:27:23,419 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:27:23,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:23,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-01 15:27:23,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:23,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:27:23,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:23,513 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-12-01 15:27:23,513 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-12-01 15:27:23,527 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 10 states and 13 transitions. Complement of second has 5 states. [2020-12-01 15:27:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-12-01 15:27:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-12-01 15:27:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2020-12-01 15:27:23,529 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2020-12-01 15:27:23,529 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:23,529 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:27:23,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:23,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-01 15:27:23,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:23,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:27:23,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:23,599 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-12-01 15:27:23,599 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-12-01 15:27:23,627 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 10 states and 13 transitions. Complement of second has 5 states. [2020-12-01 15:27:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-12-01 15:27:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-12-01 15:27:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 4 transitions. [2020-12-01 15:27:23,629 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 4 transitions. Stem has 4 letters. Loop has 2 letters. [2020-12-01 15:27:23,629 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:23,629 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:27:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:27:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:23,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-01 15:27:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:27:23,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:27:23,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:27:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:27:23,715 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-12-01 15:27:23,715 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-12-01 15:27:23,742 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 9 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 10 states and 13 transitions. Complement of second has 4 states. [2020-12-01 15:27:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-12-01 15:27:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-12-01 15:27:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-12-01 15:27:23,743 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 2 letters. [2020-12-01 15:27:23,743 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:23,743 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 6 letters. Loop has 2 letters. [2020-12-01 15:27:23,744 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:23,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 4 letters. [2020-12-01 15:27:23,744 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:27:23,744 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 13 transitions. [2020-12-01 15:27:23,745 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-12-01 15:27:23,745 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 0 states and 0 transitions. [2020-12-01 15:27:23,746 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-12-01 15:27:23,746 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-12-01 15:27:23,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-12-01 15:27:23,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-12-01 15:27:23,746 INFO L692 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:27:23,746 INFO L715 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:27:23,746 INFO L595 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:27:23,746 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-12-01 15:27:23,747 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-12-01 15:27:23,747 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-12-01 15:27:23,747 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-12-01 15:27:23,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.12 03:27:23 BoogieIcfgContainer [2020-12-01 15:27:23,754 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-12-01 15:27:23,754 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:27:23,754 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:27:23,755 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:27:23,755 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:27:19" (3/4) ... [2020-12-01 15:27:23,773 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-01 15:27:23,773 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:27:23,775 INFO L168 Benchmark]: Toolchain (without parser) took 4723.96 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 46.2 MB in the beginning and 68.2 MB in the end (delta: -22.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:27:23,781 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory was 37.0 MB in the beginning and 37.0 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:27:23,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.51 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 45.9 MB in the beginning and 73.1 MB in the end (delta: -27.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:23,783 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.20 ms. Allocated memory is still 94.4 MB. Free memory was 73.1 MB in the beginning and 72.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:27:23,783 INFO L168 Benchmark]: Boogie Preprocessor took 28.63 ms. Allocated memory is still 94.4 MB. Free memory was 72.0 MB in the beginning and 71.0 MB in the end (delta: 993.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:27:23,784 INFO L168 Benchmark]: RCFGBuilder took 310.87 ms. Allocated memory is still 94.4 MB. Free memory was 71.0 MB in the beginning and 63.1 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:27:23,785 INFO L168 Benchmark]: BuchiAutomizer took 3922.30 ms. Allocated memory is still 94.4 MB. Free memory was 62.6 MB in the beginning and 68.7 MB in the end (delta: -6.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:27:23,785 INFO L168 Benchmark]: Witness Printer took 19.42 ms. Allocated memory is still 94.4 MB. Free memory was 68.7 MB in the beginning and 68.2 MB in the end (delta: 484.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:27:23,789 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 77.6 MB. Free memory was 37.0 MB in the beginning and 37.0 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 377.51 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 45.9 MB in the beginning and 73.1 MB in the end (delta: -27.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.20 ms. Allocated memory is still 94.4 MB. Free memory was 73.1 MB in the beginning and 72.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.63 ms. Allocated memory is still 94.4 MB. Free memory was 72.0 MB in the beginning and 71.0 MB in the end (delta: 993.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 310.87 ms. Allocated memory is still 94.4 MB. Free memory was 71.0 MB in the beginning and 63.1 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3922.30 ms. Allocated memory is still 94.4 MB. Free memory was 62.6 MB in the beginning and 68.7 MB in the end (delta: -6.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 19.42 ms. Allocated memory is still 94.4 MB. Free memory was 68.7 MB in the beginning and 68.2 MB in the end (delta: 484.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (0 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function 2 * x + 1 and consists of 5 locations. One deterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.8s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 3.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 18 SDtfs, 18 SDslu, 10 SDs, 0 SdLazy, 36 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax182 hnf100 lsp38 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf93 smp100 dnf100 smp100 tf113 neg100 sie101 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 38ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...