./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/GCD4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/GCD4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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 e1a6e72adfb4c8fee6c8faa90b8bdc807e2f6147 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:07:51,422 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:07:51,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:07:51,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:07:51,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:07:51,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:07:51,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:07:51,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:07:51,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:07:51,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:07:51,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:07:51,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:07:51,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:07:51,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:07:51,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:07:51,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:07:51,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:07:51,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:07:51,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:07:51,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:07:51,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:07:51,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:07:51,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:07:51,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:07:51,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:07:51,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:07:51,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:07:51,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:07:51,588 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:07:51,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:07:51,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:07:51,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:07:51,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:07:51,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:07:51,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:07:51,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:07:51,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:07:51,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:07:51,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:07:51,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:07:51,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:07:51,603 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 19:07:51,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:07:51,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:07:51,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:07:51,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:07:51,663 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:07:51,663 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 19:07:51,663 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 19:07:51,664 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 19:07:51,664 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 19:07:51,664 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 19:07:51,665 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 19:07:51,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:07:51,666 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:07:51,666 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:07:51,666 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:07:51,667 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 19:07:51,667 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 19:07:51,667 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 19:07:51,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:07:51,668 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 19:07:51,668 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:07:51,668 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 19:07:51,668 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:07:51,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:07:51,669 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 19:07:51,669 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:07:51,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:07:51,670 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:07:51,670 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 19:07:51,673 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 19:07:51,673 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_37a634c1-25ea-481f-838a-d5e4732a45a7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1a6e72adfb4c8fee6c8faa90b8bdc807e2f6147 [2020-11-29 19:07:52,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:07:52,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:07:52,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:07:52,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:07:52,049 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:07:52,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/GCD4.c [2020-11-29 19:07:52,170 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/data/f2fe2f709/dd6b38b2b0ea4684a09c2b4be7fbab66/FLAG06a4ee3ea [2020-11-29 19:07:52,700 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:07:52,700 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/sv-benchmarks/c/termination-restricted-15/GCD4.c [2020-11-29 19:07:52,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/data/f2fe2f709/dd6b38b2b0ea4684a09c2b4be7fbab66/FLAG06a4ee3ea [2020-11-29 19:07:53,063 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/data/f2fe2f709/dd6b38b2b0ea4684a09c2b4be7fbab66 [2020-11-29 19:07:53,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:07:53,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:07:53,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:07:53,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:07:53,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:07:53,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3094be8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53, skipping insertion in model container [2020-11-29 19:07:53,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:07:53,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:07:53,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:07:53,291 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:07:53,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:07:53,346 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:07:53,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53 WrapperNode [2020-11-29 19:07:53,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:07:53,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:07:53,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:07:53,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:07:53,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,393 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:07:53,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:07:53,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:07:53,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:07:53,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... [2020-11-29 19:07:53,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:07:53,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:07:53,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:07:53,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:07:53,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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 [2020-11-29 19:07:53,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:07:53,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:07:53,701 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:07:53,701 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 19:07:53,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:07:53 BoogieIcfgContainer [2020-11-29 19:07:53,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:07:53,705 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 19:07:53,705 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 19:07:53,709 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 19:07:53,710 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:07:53,710 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 07:07:53" (1/3) ... [2020-11-29 19:07:53,712 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@57a7adb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:07:53, skipping insertion in model container [2020-11-29 19:07:53,712 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:07:53,712 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:07:53" (2/3) ... [2020-11-29 19:07:53,713 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@57a7adb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:07:53, skipping insertion in model container [2020-11-29 19:07:53,713 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:07:53,713 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:07:53" (3/3) ... [2020-11-29 19:07:53,715 INFO L373 chiAutomizerObserver]: Analyzing ICFG GCD4.c [2020-11-29 19:07:53,786 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 19:07:53,786 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 19:07:53,786 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 19:07:53,787 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:07:53,787 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:07:53,787 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 19:07:53,787 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:07:53,787 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 19:07:53,803 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 19:07:53,824 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:07:53,824 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:07:53,825 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:07:53,832 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:07:53,832 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:07:53,832 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 19:07:53,833 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-29 19:07:53,834 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:07:53,834 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:07:53,834 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:07:53,835 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:07:53,835 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:07:53,843 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L13-2true [2020-11-29 19:07:53,844 INFO L796 eck$LassoCheckResult]: Loop: 6#L13-2true assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 3#L17-2true assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 9#L17-3true main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 6#L13-2true [2020-11-29 19:07:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:53,855 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 19:07:53,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:07:53,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314627559] [2020-11-29 19:07:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:07:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:53,970 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:53,986 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:54,010 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:07:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-11-29 19:07:54,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:07:54,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434221741] [2020-11-29 19:07:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:07:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:54,055 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:54,076 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:54,081 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:07:54,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:54,086 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2020-11-29 19:07:54,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:07:54,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329760039] [2020-11-29 19:07:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:07:54,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:54,105 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:54,127 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:54,132 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:07:54,336 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2020-11-29 19:07:54,411 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:07:54,412 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:07:54,412 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:07:54,412 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:07:54,412 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:07:54,413 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:54,413 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:07:54,413 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:07:54,413 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2020-11-29 19:07:54,413 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:07:54,414 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:07:54,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:54,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:54,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:54,788 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:07:54,789 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:07:54,815 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:07:54,816 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:54,864 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:07:54,864 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:07:55,686 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:07:55,689 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:07:55,689 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:07:55,690 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:07:55,690 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:07:55,690 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:07:55,690 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:55,690 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:07:55,690 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:07:55,690 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2020-11-29 19:07:55,691 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:07:55,691 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:07:55,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:55,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:55,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:55,860 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:07:55,865 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:07:55,874 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 [2020-11-29 19:07:55,876 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:07:55,877 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:07:55,877 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:07:55,877 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:07:55,883 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:07:55,883 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:55,891 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:07:55,921 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 [2020-11-29 19:07:55,923 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:07:55,924 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:07:55,924 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:07:55,924 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:07:55,925 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:07:55,929 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:07:55,929 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:55,941 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:07:55,963 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:07:55,963 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:55,979 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:07:55,979 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:07:55,979 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:07:55,980 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2020-11-29 19:07:56,007 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:07:56,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:07:56,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:07:56,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:07:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:07:56,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:07:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:07:56,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:07:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:07:56,227 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 19:07:56,229 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 4 states. [2020-11-29 19:07:56,441 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 4 states. Result 33 states and 49 transitions. Complement of second has 10 states. [2020-11-29 19:07:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 19:07:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 19:07:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 24 transitions. [2020-11-29 19:07:56,448 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 3 letters. [2020-11-29 19:07:56,449 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:07:56,449 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-29 19:07:56,449 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:07:56,449 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 6 letters. [2020-11-29 19:07:56,450 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:07:56,451 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 49 transitions. [2020-11-29 19:07:56,460 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-11-29 19:07:56,466 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 11 states and 16 transitions. [2020-11-29 19:07:56,468 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-11-29 19:07:56,468 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-29 19:07:56,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2020-11-29 19:07:56,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:07:56,471 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-11-29 19:07:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2020-11-29 19:07:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-11-29 19:07:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 19:07:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2020-11-29 19:07:56,504 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2020-11-29 19:07:56,504 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2020-11-29 19:07:56,504 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 19:07:56,504 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 15 transitions. [2020-11-29 19:07:56,505 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-11-29 19:07:56,506 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:07:56,506 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:07:56,506 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 19:07:56,506 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 19:07:56,507 INFO L794 eck$LassoCheckResult]: Stem: 90#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 91#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 86#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 87#L17-2 [2020-11-29 19:07:56,507 INFO L796 eck$LassoCheckResult]: Loop: 87#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 87#L17-2 [2020-11-29 19:07:56,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:56,508 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-11-29 19:07:56,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:07:56,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969787714] [2020-11-29 19:07:56,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:07:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:56,529 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:56,547 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:56,549 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:07:56,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:56,550 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-11-29 19:07:56,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:07:56,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168816159] [2020-11-29 19:07:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:07:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:56,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:56,573 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:56,577 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:07:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:56,578 INFO L82 PathProgramCache]: Analyzing trace with hash 963530, now seen corresponding path program 2 times [2020-11-29 19:07:56,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:07:56,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398406468] [2020-11-29 19:07:56,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:07:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:56,607 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:56,614 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:56,616 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:07:56,650 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:07:56,650 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:07:56,650 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:07:56,650 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:07:56,651 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:07:56,651 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:56,651 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:07:56,651 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:07:56,651 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2020-11-29 19:07:56,651 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:07:56,652 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:07:56,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:56,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:56,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:56,765 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:07:56,765 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:07:56,776 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:07:56,776 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:56,782 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:07:56,782 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_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:56,830 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:07:56,831 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:07:56,836 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:07:56,837 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_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:56,890 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:07:56,890 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:07:56,944 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:07:56,944 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:57,092 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:07:57,094 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:07:57,095 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:07:57,095 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:07:57,095 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:07:57,095 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:07:57,095 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:57,095 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:07:57,095 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:07:57,095 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2020-11-29 19:07:57,095 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:07:57,095 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:07:57,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:57,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:57,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:57,228 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:07:57,229 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:07:57,243 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 [2020-11-29 19:07:57,245 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:07:57,245 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:07:57,245 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:07:57,245 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:07:57,251 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:07:57,254 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:57,260 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:57,299 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 19:07:57,301 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:07:57,301 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:07:57,302 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:07:57,302 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:07:57,313 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:07:57,314 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:07:57,321 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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 [2020-11-29 19:07:57,350 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 [2020-11-29 19:07:57,352 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:07:57,352 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:07:57,352 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:07:57,353 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:07:57,353 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:07:57,355 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:07:57,355 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:07:57,378 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:07:57,385 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:07:57,385 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:07:57,393 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:07:57,393 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:07:57,393 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:07:57,394 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:57,434 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:07:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:07:57,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:07:57,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:07:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:07:57,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:07:57,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:07:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:07:57,481 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:07:57,481 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 15 transitions. cyclomatic complexity: 8 Second operand 2 states. [2020-11-29 19:07:57,499 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 15 transitions. cyclomatic complexity: 8. Second operand 2 states. Result 15 states and 22 transitions. Complement of second has 5 states. [2020-11-29 19:07:57,522 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 [2020-11-29 19:07:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:07:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2020-11-29 19:07:57,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 1 letters. [2020-11-29 19:07:57,524 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:07:57,524 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 1 letters. [2020-11-29 19:07:57,524 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:07:57,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 2 letters. [2020-11-29 19:07:57,525 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:07:57,525 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 22 transitions. [2020-11-29 19:07:57,526 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:07:57,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 13 states and 19 transitions. [2020-11-29 19:07:57,527 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-29 19:07:57,527 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-11-29 19:07:57,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2020-11-29 19:07:57,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:07:57,528 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2020-11-29 19:07:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2020-11-29 19:07:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2020-11-29 19:07:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 19:07:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2020-11-29 19:07:57,530 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2020-11-29 19:07:57,531 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2020-11-29 19:07:57,531 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 19:07:57,531 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 17 transitions. [2020-11-29 19:07:57,532 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-29 19:07:57,546 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:07:57,546 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:07:57,548 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 19:07:57,548 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 19:07:57,548 INFO L794 eck$LassoCheckResult]: Stem: 146#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 147#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 150#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 153#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 144#L17-3 [2020-11-29 19:07:57,548 INFO L796 eck$LassoCheckResult]: Loop: 144#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 148#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 143#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 144#L17-3 [2020-11-29 19:07:57,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:57,549 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 1 times [2020-11-29 19:07:57,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:07:57,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765428314] [2020-11-29 19:07:57,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:07:57,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:57,557 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:57,578 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:57,583 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:07:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:57,586 INFO L82 PathProgramCache]: Analyzing trace with hash 52221, now seen corresponding path program 2 times [2020-11-29 19:07:57,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:07:57,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564961887] [2020-11-29 19:07:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:07:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:57,596 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:07:57,600 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:07:57,601 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:07:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:07:57,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285994, now seen corresponding path program 1 times [2020-11-29 19:07:57,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:07:57,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874868612] [2020-11-29 19:07:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:07:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:07:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:07:57,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874868612] [2020-11-29 19:07:57,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318237285] [2020-11-29 19:07:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:07:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:07:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 19:07:57,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:07:57,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 19:07:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:07:57,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:07:57,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-11-29 19:07:57,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284268494] [2020-11-29 19:07:57,954 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:07:57,955 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:07:57,955 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:07:57,955 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:07:57,955 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:07:57,955 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:07:57,955 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:07:57,955 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:07:57,955 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2020-11-29 19:07:57,955 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:07:57,956 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:07:57,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:57,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:57,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:07:58,090 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:07:58,091 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:07:58,141 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:07:58,142 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:07:58,205 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:07:58,205 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:02,507 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:08:02,511 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:08:02,511 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:08:02,511 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:08:02,511 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:08:02,511 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:08:02,511 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:02,511 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:08:02,512 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:08:02,512 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2020-11-29 19:08:02,512 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:08:02,512 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:08:02,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:02,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:02,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:02,700 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:08:02,700 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:08:02,709 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 [2020-11-29 19:08:02,711 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:08:02,711 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:08:02,712 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:08:02,712 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:08:02,715 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:08:02,716 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:02,728 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:08:02,780 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 [2020-11-29 19:08:02,783 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:08:02,783 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:08:02,783 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:08:02,783 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:08:02,783 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:08:02,787 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:08:02,788 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:02,793 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:08:02,798 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 19:08:02,798 INFO L444 ModelExtractionUtils]: 4 out of 6 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:08:02,812 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:08:02,812 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:08:02,813 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:08:02,813 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:02,843 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:08:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:08:02,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:02,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 19:08:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:02,933 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 19:08:02,933 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 9 Second operand 4 states. [2020-11-29 19:08:02,990 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 9. Second operand 4 states. Result 33 states and 52 transitions. Complement of second has 10 states. [2020-11-29 19:08:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 19:08:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 19:08:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2020-11-29 19:08:02,992 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-29 19:08:02,992 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:02,992 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-29 19:08:02,993 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:02,993 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 6 letters. [2020-11-29 19:08:02,993 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:02,993 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 52 transitions. [2020-11-29 19:08:02,996 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2020-11-29 19:08:02,997 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 24 states and 35 transitions. [2020-11-29 19:08:02,997 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-29 19:08:02,997 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2020-11-29 19:08:02,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2020-11-29 19:08:02,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:08:02,997 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2020-11-29 19:08:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2020-11-29 19:08:03,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-11-29 19:08:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 19:08:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2020-11-29 19:08:03,001 INFO L714 BuchiCegarLoop]: Abstraction has 22 states and 33 transitions. [2020-11-29 19:08:03,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:08:03,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 19:08:03,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 19:08:03,008 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand 9 states. [2020-11-29 19:08:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:08:03,248 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2020-11-29 19:08:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 19:08:03,249 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2020-11-29 19:08:03,250 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2020-11-29 19:08:03,251 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 26 transitions. [2020-11-29 19:08:03,251 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-11-29 19:08:03,251 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-29 19:08:03,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 26 transitions. [2020-11-29 19:08:03,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:08:03,252 INFO L691 BuchiCegarLoop]: Abstraction has 19 states and 26 transitions. [2020-11-29 19:08:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 26 transitions. [2020-11-29 19:08:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2020-11-29 19:08:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 19:08:03,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2020-11-29 19:08:03,254 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2020-11-29 19:08:03,254 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2020-11-29 19:08:03,254 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 19:08:03,254 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2020-11-29 19:08:03,255 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 19:08:03,255 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:08:03,255 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:08:03,255 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 19:08:03,255 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 19:08:03,255 INFO L794 eck$LassoCheckResult]: Stem: 322#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 323#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 326#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 325#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 321#L17-3 [2020-11-29 19:08:03,256 INFO L796 eck$LassoCheckResult]: Loop: 321#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 324#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 318#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 319#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 321#L17-3 [2020-11-29 19:08:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:03,256 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 2 times [2020-11-29 19:08:03,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:03,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996599676] [2020-11-29 19:08:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:03,261 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:03,266 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:03,267 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:08:03,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:03,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1618930, now seen corresponding path program 1 times [2020-11-29 19:08:03,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:03,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657119015] [2020-11-29 19:08:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:03,274 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:03,279 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:03,281 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:08:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:03,282 INFO L82 PathProgramCache]: Analyzing trace with hash 780807225, now seen corresponding path program 2 times [2020-11-29 19:08:03,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:03,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467783436] [2020-11-29 19:08:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:03,292 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:03,301 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:03,304 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:08:03,403 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:08:03,404 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:08:03,404 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:08:03,404 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:08:03,404 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:08:03,404 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:03,404 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:08:03,404 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:08:03,404 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2020-11-29 19:08:03,404 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:08:03,405 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:08:03,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:03,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:03,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:03,581 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:08:03,581 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:03,585 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:08:03,586 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:08:03,589 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:08:03,589 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/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) [2020-11-29 19:08:03,623 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:08:03,623 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 [2020-11-29 19:08:03,628 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:08:03,628 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_7=0} Honda state: {v_rep~unnamed0~0~false_7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:03,664 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:08:03,664 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:03,714 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:08:03,714 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:08:06,543 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:08:06,546 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:08:06,546 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:08:06,546 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:08:06,546 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:08:06,547 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:08:06,547 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:06,547 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:08:06,547 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:08:06,547 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2020-11-29 19:08:06,547 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:08:06,547 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:08:06,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:06,568 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:06,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:06,642 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:08:06,642 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:06,650 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 [2020-11-29 19:08:06,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:08:06,652 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:08:06,652 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:08:06,652 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:08:06,652 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:08:06,655 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:08:06,655 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:08:06,659 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:08:06,663 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:08:06,663 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:08:06,666 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:08:06,666 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:08:06,666 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:08:06,666 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:06,691 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:08:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:08:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:06,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:08:06,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:08:06,752 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 19:08:06,753 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-29 19:08:06,817 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 23 states and 32 transitions. Complement of second has 6 states. [2020-11-29 19:08:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 19:08:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 19:08:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-11-29 19:08:06,819 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-29 19:08:06,819 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:06,819 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 4 letters. [2020-11-29 19:08:06,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:06,820 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 8 letters. [2020-11-29 19:08:06,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:06,820 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 32 transitions. [2020-11-29 19:08:06,822 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:08:06,822 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 27 transitions. [2020-11-29 19:08:06,823 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-29 19:08:06,823 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-29 19:08:06,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 27 transitions. [2020-11-29 19:08:06,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:08:06,823 INFO L691 BuchiCegarLoop]: Abstraction has 19 states and 27 transitions. [2020-11-29 19:08:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 27 transitions. [2020-11-29 19:08:06,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2020-11-29 19:08:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 19:08:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2020-11-29 19:08:06,826 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-29 19:08:06,826 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2020-11-29 19:08:06,826 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 19:08:06,826 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2020-11-29 19:08:06,827 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:08:06,827 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:08:06,827 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:08:06,827 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2020-11-29 19:08:06,827 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 19:08:06,828 INFO L794 eck$LassoCheckResult]: Stem: 405#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 406#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 415#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 412#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 411#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 407#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 402#L17-2 [2020-11-29 19:08:06,828 INFO L796 eck$LassoCheckResult]: Loop: 402#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 402#L17-2 [2020-11-29 19:08:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 3 times [2020-11-29 19:08:06,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:06,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023304861] [2020-11-29 19:08:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:06,836 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:06,843 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:06,845 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:08:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-11-29 19:08:06,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:06,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097584654] [2020-11-29 19:08:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:06,851 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:06,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:06,854 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:06,855 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:08:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:06,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285992, now seen corresponding path program 4 times [2020-11-29 19:08:06,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:08:06,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025767300] [2020-11-29 19:08:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:08:06,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:06,869 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:08:06,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:08:06,885 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:08:06,917 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:08:06,917 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:08:06,917 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:08:06,917 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:08:06,918 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:08:06,918 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:06,918 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:08:06,918 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:08:06,918 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2020-11-29 19:08:06,918 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:08:06,918 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:08:06,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:06,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:06,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:07,010 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:08:07,010 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:07,016 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:08:07,017 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:08:07,020 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:08:07,020 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:07,049 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:08:07,049 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:08:07,052 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:08:07,053 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:07,084 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:08:07,084 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:07,115 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:08:07,115 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:08:07,266 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:08:07,268 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:08:07,268 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:08:07,269 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:08:07,269 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:08:07,269 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:08:07,269 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:07,269 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:08:07,269 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:08:07,269 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2020-11-29 19:08:07,269 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:08:07,269 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:08:07,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:07,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:07,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:08:07,372 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:08:07,372 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:07,376 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 [2020-11-29 19:08:07,378 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:08:07,378 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:08:07,378 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:08:07,378 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:08:07,381 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:08:07,381 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:08:07,385 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 32 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:07,413 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 [2020-11-29 19:08:07,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:08:07,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:08:07,417 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:08:07,417 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:08:07,421 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:08:07,421 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:08:07,430 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 33 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:07,461 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 [2020-11-29 19:08:07,463 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:08:07,463 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:08:07,463 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:08:07,463 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:08:07,463 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:08:07,465 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:08:07,465 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:08:07,468 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:08:07,475 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-29 19:08:07,475 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37a634c1-25ea-481f-838a-d5e4732a45a7/bin/uautomizer/z3 Starting monitored process 34 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:08:07,478 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:08:07,478 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:08:07,479 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:08:07,479 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2020-11-29 19:08:07,506 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:08:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:07,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:08:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:07,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:08:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:07,545 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:08:07,545 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2020-11-29 19:08:07,570 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9. Second operand 2 states. Result 20 states and 28 transitions. Complement of second has 5 states. [2020-11-29 19:08:07,571 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 [2020-11-29 19:08:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:08:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:08:07,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2020-11-29 19:08:07,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:07,571 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 19:08:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:07,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:08:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:07,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:08:07,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:07,604 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:08:07,604 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2020-11-29 19:08:07,615 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9. Second operand 2 states. Result 20 states and 28 transitions. Complement of second has 5 states. [2020-11-29 19:08:07,616 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 [2020-11-29 19:08:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:08:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-29 19:08:07,616 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2020-11-29 19:08:07,616 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:07,616 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 19:08:07,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:08:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:08:07,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:08:07,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:08:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:08:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:08:07,660 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-29 19:08:07,660 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2020-11-29 19:08:07,678 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9. Second operand 2 states. Result 22 states and 30 transitions. Complement of second has 4 states. [2020-11-29 19:08:07,679 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 [2020-11-29 19:08:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-29 19:08:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-11-29 19:08:07,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2020-11-29 19:08:07,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:07,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 1 letters. [2020-11-29 19:08:07,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:07,681 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 2 letters. [2020-11-29 19:08:07,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:08:07,681 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 30 transitions. [2020-11-29 19:08:07,683 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 19:08:07,683 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 0 states and 0 transitions. [2020-11-29 19:08:07,683 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 19:08:07,683 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 19:08:07,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 19:08:07,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:08:07,684 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:08:07,684 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:08:07,684 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:08:07,684 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 19:08:07,684 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:08:07,685 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 19:08:07,685 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 19:08:07,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 07:08:07 BoogieIcfgContainer [2020-11-29 19:08:07,691 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 19:08:07,692 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:08:07,692 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:08:07,692 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:08:07,693 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:07:53" (3/4) ... [2020-11-29 19:08:07,696 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:08:07,696 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:08:07,697 INFO L168 Benchmark]: Toolchain (without parser) took 14623.35 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 62.0 MB in the beginning and 93.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2020-11-29 19:08:07,698 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory was 70.0 MB in the beginning and 70.0 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:08:07,698 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.72 ms. Allocated memory is still 96.5 MB. Free memory was 61.8 MB in the beginning and 74.6 MB in the end (delta: -12.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:08:07,699 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.69 ms. Allocated memory is still 96.5 MB. Free memory was 74.6 MB in the beginning and 73.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:08:07,700 INFO L168 Benchmark]: Boogie Preprocessor took 24.73 ms. Allocated memory is still 96.5 MB. Free memory was 73.4 MB in the beginning and 72.6 MB in the end (delta: 855.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:08:07,700 INFO L168 Benchmark]: RCFGBuilder took 281.61 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 64.3 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:08:07,701 INFO L168 Benchmark]: BuchiAutomizer took 13986.53 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 63.9 MB in the beginning and 94.5 MB in the end (delta: -30.5 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. [2020-11-29 19:08:07,702 INFO L168 Benchmark]: Witness Printer took 4.03 ms. Allocated memory is still 146.8 MB. Free memory was 94.5 MB in the beginning and 93.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:08:07,706 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 96.5 MB. Free memory was 70.0 MB in the beginning and 70.0 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 273.72 ms. Allocated memory is still 96.5 MB. Free memory was 61.8 MB in the beginning and 74.6 MB in the end (delta: -12.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.69 ms. Allocated memory is still 96.5 MB. Free memory was 74.6 MB in the beginning and 73.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.73 ms. Allocated memory is still 96.5 MB. Free memory was 73.4 MB in the beginning and 72.6 MB in the end (delta: 855.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 281.61 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 64.3 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 13986.53 ms. Allocated memory was 96.5 MB in the beginning and 146.8 MB in the end (delta: 50.3 MB). Free memory was 63.9 MB in the beginning and 94.5 MB in the end (delta: -30.5 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. * Witness Printer took 4.03 ms. Allocated memory is still 146.8 MB. Free memory was 94.5 MB in the beginning and 93.4 MB in the end (delta: 1.0 MB). 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 6 terminating modules (1 trivial, 4 deterministic, 1 nondeterministic). One deterministic module has affine ranking function y and consists of 6 locations. One deterministic module has affine ranking function xtmp and consists of 3 locations. One deterministic module has affine ranking function xtmp and consists of 6 locations. One deterministic module has affine ranking function xtmp and consists of 4 locations. One nondeterministic module has affine ranking function xtmp and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 9 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 13.9s and 6 iterations. TraceHistogramMax:2. Analysis of lassos took 12.5s. Construction of modules took 0.1s. Büchi inclusion checks took 1.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 14 states and ocurred in iteration 4. Nontrivial modules had stage [4, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 33 SDtfs, 45 SDslu, 9 SDs, 0 SdLazy, 102 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax165 hnf95 lsp58 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq166 hnf91 smp100 dnf100 smp100 tf108 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 24ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...