./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/gcd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/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 32bit --witnessprinter.graph.data.programhash d6f4e1dd3818e9d3e8c54653af66359ead501b84 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:57:02,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:57:02,443 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:57:02,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:57:02,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:57:02,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:57:02,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:57:02,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:57:02,515 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:57:02,516 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:57:02,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:57:02,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:57:02,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:57:02,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:57:02,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:57:02,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:57:02,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:57:02,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:57:02,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:57:02,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:57:02,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:57:02,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:57:02,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:57:02,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:57:02,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:57:02,580 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:57:02,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:57:02,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:57:02,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:57:02,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:57:02,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:57:02,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:57:02,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:57:02,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:57:02,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:57:02,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:57:02,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:57:02,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:57:02,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:57:02,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:57:02,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:57:02,603 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-12-01 15:57:02,636 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:57:02,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:57:02,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:57:02,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:57:02,651 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:57:02,651 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-12-01 15:57:02,651 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-12-01 15:57:02,652 INFO L138 SettingsManager]: * Use old map elimination=false [2020-12-01 15:57:02,652 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-12-01 15:57:02,652 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-12-01 15:57:02,652 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-12-01 15:57:02,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:57:02,653 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:57:02,653 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 15:57:02,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:57:02,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:57:02,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:57:02,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-12-01 15:57:02,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-12-01 15:57:02,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-12-01 15:57:02,655 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:57:02,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:57:02,656 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-12-01 15:57:02,657 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:57:02,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-12-01 15:57:02,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:57:02,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:57:02,658 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-12-01 15:57:02,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:57:02,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:57:02,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:57:02,659 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-12-01 15:57:02,661 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-12-01 15:57:02,661 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_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6f4e1dd3818e9d3e8c54653af66359ead501b84 [2020-12-01 15:57:02,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:57:03,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:57:03,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:57:03,039 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:57:03,041 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:57:03,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/../../sv-benchmarks/c/recursive/gcd01-1.c [2020-12-01 15:57:03,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/data/0d7775d95/919d3305d2964ac5844ca8051ee606ba/FLAGf395cafd9 [2020-12-01 15:57:03,770 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:57:03,771 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/sv-benchmarks/c/recursive/gcd01-1.c [2020-12-01 15:57:03,780 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/data/0d7775d95/919d3305d2964ac5844ca8051ee606ba/FLAGf395cafd9 [2020-12-01 15:57:04,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/data/0d7775d95/919d3305d2964ac5844ca8051ee606ba [2020-12-01 15:57:04,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:57:04,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:57:04,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:57:04,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:57:04,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:57:04,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75477b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04, skipping insertion in model container [2020-12-01 15:57:04,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:57:04,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:57:04,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:57:04,492 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:57:04,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:57:04,560 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:57:04,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04 WrapperNode [2020-12-01 15:57:04,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:57:04,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:57:04,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:57:04,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:57:04,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:57:04,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:57:04,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:57:04,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:57:04,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... [2020-12-01 15:57:04,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:57:04,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:57:04,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:57:04,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:57:04,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:04,833 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-12-01 15:57:04,833 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-12-01 15:57:04,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:57:04,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:57:04,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:57:04,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:57:05,222 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:57:05,223 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 15:57:05,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:57:05 BoogieIcfgContainer [2020-12-01 15:57:05,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:57:05,227 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-12-01 15:57:05,227 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-12-01 15:57:05,235 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-12-01 15:57:05,236 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:57:05,237 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 01.12 03:57:04" (1/3) ... [2020-12-01 15:57:05,239 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@47661771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 03:57:05, skipping insertion in model container [2020-12-01 15:57:05,239 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:57:05,239 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:57:04" (2/3) ... [2020-12-01 15:57:05,240 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@47661771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 03:57:05, skipping insertion in model container [2020-12-01 15:57:05,240 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:57:05,241 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:57:05" (3/3) ... [2020-12-01 15:57:05,243 INFO L389 chiAutomizerObserver]: Analyzing ICFG gcd01-1.c [2020-12-01 15:57:05,310 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-12-01 15:57:05,311 INFO L360 BuchiCegarLoop]: Hoare is false [2020-12-01 15:57:05,311 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-12-01 15:57:05,311 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:57:05,312 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:57:05,312 INFO L364 BuchiCegarLoop]: Difference is false [2020-12-01 15:57:05,312 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:57:05,312 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-12-01 15:57:05,330 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-12-01 15:57:05,363 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-12-01 15:57:05,363 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:57:05,363 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:57:05,373 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-12-01 15:57:05,374 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-12-01 15:57:05,374 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-12-01 15:57:05,374 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-12-01 15:57:05,378 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-12-01 15:57:05,379 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:57:05,379 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:57:05,380 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-12-01 15:57:05,380 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-12-01 15:57:05,390 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 15#L32true assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 24#L36true assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 8#L39true call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 3#gcdENTRYtrue [2020-12-01 15:57:05,391 INFO L796 eck$LassoCheckResult]: Loop: 3#gcdENTRYtrue ~y1 := #in~y1;~y2 := #in~y2; 13#L18true assume !(~y1 <= 0 || ~y2 <= 0); 10#L21true assume !(~y1 == ~y2); 4#L24true assume ~y1 > ~y2; 7#L25true call #t~ret7 := gcd(~y1 - ~y2, ~y2);< 3#gcdENTRYtrue [2020-12-01 15:57:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:05,401 INFO L82 PathProgramCache]: Analyzing trace with hash 45873353, now seen corresponding path program 1 times [2020-12-01 15:57:05,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:57:05,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654731091] [2020-12-01 15:57:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:57:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:05,559 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:05,587 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:05,617 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:57:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:05,620 INFO L82 PathProgramCache]: Analyzing trace with hash 28756389, now seen corresponding path program 1 times [2020-12-01 15:57:05,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:57:05,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372313388] [2020-12-01 15:57:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:57:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:05,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:05,640 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:05,643 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:57:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:05,646 INFO L82 PathProgramCache]: Analyzing trace with hash 50269661, now seen corresponding path program 1 times [2020-12-01 15:57:05,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:57:05,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258618612] [2020-12-01 15:57:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:57:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:05,679 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:05,708 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:05,717 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:57:06,034 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:57:06,034 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:57:06,035 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:57:06,035 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:57:06,035 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:57:06,035 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:06,036 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:57:06,036 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:57:06,036 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration1_Loop [2020-12-01 15:57:06,036 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:57:06,037 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:57:06,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,102 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,106 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,257 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:57:06,258 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:57:06,273 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:57:06,273 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:06,291 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:57:06,291 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#res=0} Honda state: {gcd_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/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 [2020-12-01 15:57:06,337 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:57:06,338 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:06,380 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:57:06,380 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:57:06,607 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:57:06,615 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:57:06,615 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:57:06,616 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:57:06,616 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:57:06,616 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:57:06,616 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:06,616 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:57:06,616 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:57:06,616 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration1_Loop [2020-12-01 15:57:06,616 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:57:06,616 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:57:06,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:06,781 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:57:06,788 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:06,803 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 15:57:06,807 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:57:06,807 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:57:06,808 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:57:06,808 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:57:06,809 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:57:06,812 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:57:06,812 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:57:06,819 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:57:06,875 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 15:57:06,877 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:57:06,878 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:57:06,878 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:57:06,878 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:57:06,878 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:57:06,880 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:57:06,880 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:06,894 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:57:06,949 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 15:57:06,952 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:57:06,953 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:57:06,953 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:57:06,953 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:57:06,953 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:57:06,957 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:57:06,957 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:06,986 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:57:06,994 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:57:06,995 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_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:57:07,020 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:57:07,021 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:57:07,021 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:57:07,022 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_#in~y1) = 1*gcd_#in~y1 Supporting invariants [] Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:07,058 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:57:07,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:57:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:57:07,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:57:07,432 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2020-12-01 15:57:07,434 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states. Second operand 5 states. [2020-12-01 15:57:07,887 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 22 states.. Second operand 5 states. Result 95 states and 131 transitions. Complement of second has 30 states. [2020-12-01 15:57:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-12-01 15:57:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-12-01 15:57:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 25 transitions. [2020-12-01 15:57:07,901 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 5 letters. [2020-12-01 15:57:07,903 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:07,903 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 10 letters. Loop has 5 letters. [2020-12-01 15:57:07,904 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:07,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 10 letters. [2020-12-01 15:57:07,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:07,906 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 95 states and 131 transitions. [2020-12-01 15:57:07,919 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:57:07,927 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 95 states to 36 states and 41 transitions. [2020-12-01 15:57:07,929 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-12-01 15:57:07,930 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2020-12-01 15:57:07,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 41 transitions. [2020-12-01 15:57:07,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:57:07,936 INFO L692 BuchiCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-01 15:57:07,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states and 41 transitions. [2020-12-01 15:57:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 18. [2020-12-01 15:57:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-01 15:57:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-01 15:57:07,988 INFO L715 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-01 15:57:07,988 INFO L595 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-01 15:57:07,988 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-12-01 15:57:07,988 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 21 transitions. [2020-12-01 15:57:07,993 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:57:07,993 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:57:07,993 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:57:07,994 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-12-01 15:57:07,994 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-12-01 15:57:07,995 INFO L794 eck$LassoCheckResult]: Stem: 217#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 205#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 206#L32 assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 218#L36 assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 210#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 222#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 207#L18 [2020-12-01 15:57:07,995 INFO L796 eck$LassoCheckResult]: Loop: 207#L18 assume !(~y1 <= 0 || ~y2 <= 0); 209#L21 assume !(~y1 == ~y2); 219#L24 assume !(~y1 > ~y2); 208#L27 call #t~ret8 := gcd(~y1, ~y2 - ~y1);< 215#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 207#L18 [2020-12-01 15:57:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1422073943, now seen corresponding path program 1 times [2020-12-01 15:57:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:57:07,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177246211] [2020-12-01 15:57:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:57:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:08,044 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:08,090 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:08,096 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:57:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:08,097 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 1 times [2020-12-01 15:57:08,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:57:08,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139086796] [2020-12-01 15:57:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:57:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:08,120 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:08,139 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:08,141 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:57:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:08,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1558362436, now seen corresponding path program 1 times [2020-12-01 15:57:08,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:57:08,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453099445] [2020-12-01 15:57:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:57:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:08,199 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:08,250 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:08,257 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:57:08,413 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:57:08,413 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:57:08,414 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:57:08,414 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:57:08,414 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:57:08,415 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:08,415 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:57:08,416 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:57:08,416 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration2_Loop [2020-12-01 15:57:08,416 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:57:08,416 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:57:08,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:08,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:08,476 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:08,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:08,614 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-12-01 15:57:08,701 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:57:08,702 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:57:08,718 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:57:08,718 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:57:08,800 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:57:08,801 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 [2020-12-01 15:57:11,351 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:57:11,354 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:57:11,354 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:57:11,354 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:57:11,354 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:57:11,354 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:57:11,354 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:11,354 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:57:11,354 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:57:11,354 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration2_Loop [2020-12-01 15:57:11,355 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:57:11,355 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:57:11,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:11,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:11,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:11,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:11,527 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:57:11,528 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:11,536 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 15:57:11,539 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:57:11,539 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:57:11,539 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:57:11,539 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:57:11,539 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:57:11,545 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:57:11,545 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:57:11,566 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:57:11,597 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:57:11,597 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_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/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 [2020-12-01 15:57:11,648 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:57:11,649 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:57:11,649 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:57:11,649 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] [2020-12-01 15:57:11,688 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:57:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:57:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:11,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:57:11,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:57:11,918 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 [2020-12-01 15:57:11,918 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5 Second operand 4 states. [2020-12-01 15:57:11,973 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 54 states and 61 transitions. Complement of second has 11 states. [2020-12-01 15:57:11,974 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 [2020-12-01 15:57:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-12-01 15:57:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-12-01 15:57:11,976 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 5 letters. [2020-12-01 15:57:11,976 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:11,976 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-12-01 15:57:11,977 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:11,977 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 10 letters. [2020-12-01 15:57:11,977 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:11,977 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 61 transitions. [2020-12-01 15:57:11,981 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:57:11,983 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 33 states and 37 transitions. [2020-12-01 15:57:11,983 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-12-01 15:57:11,983 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-12-01 15:57:11,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 37 transitions. [2020-12-01 15:57:11,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:57:11,984 INFO L692 BuchiCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-01 15:57:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 37 transitions. [2020-12-01 15:57:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-12-01 15:57:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-01 15:57:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-01 15:57:11,989 INFO L715 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-01 15:57:11,989 INFO L595 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-01 15:57:11,989 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-12-01 15:57:11,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 28 transitions. [2020-12-01 15:57:11,990 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:57:11,990 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:57:11,990 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:57:11,991 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:57:11,998 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-12-01 15:57:11,998 INFO L794 eck$LassoCheckResult]: Stem: 353#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 339#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 340#L32 assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 354#L36 assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 342#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 341#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 343#L18 assume !(~y1 <= 0 || ~y2 <= 0); 358#L21 assume !(~y1 == ~y2); 356#L24 assume ~y1 > ~y2; 347#L25 call #t~ret7 := gcd(~y1 - ~y2, ~y2);< 357#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 346#L18 [2020-12-01 15:57:11,998 INFO L796 eck$LassoCheckResult]: Loop: 346#L18 assume !(~y1 <= 0 || ~y2 <= 0); 349#L21 assume !(~y1 == ~y2); 355#L24 assume !(~y1 > ~y2); 348#L27 call #t~ret8 := gcd(~y1, ~y2 - ~y1);< 359#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 346#L18 [2020-12-01 15:57:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:11,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1558359491, now seen corresponding path program 2 times [2020-12-01 15:57:11,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:57:11,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461098546] [2020-12-01 15:57:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:57:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:12,013 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:12,033 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:12,041 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:57:12,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:12,042 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 2 times [2020-12-01 15:57:12,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:57:12,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030086958] [2020-12-01 15:57:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:57:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:12,055 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:12,059 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:12,061 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:57:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:12,061 INFO L82 PathProgramCache]: Analyzing trace with hash -474042536, now seen corresponding path program 1 times [2020-12-01 15:57:12,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:57:12,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103698709] [2020-12-01 15:57:12,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:57:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:12,076 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:57:12,090 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:57:12,094 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:57:12,216 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:57:12,216 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:57:12,217 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:57:12,217 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:57:12,217 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:57:12,217 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:12,217 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:57:12,217 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:57:12,217 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration3_Loop [2020-12-01 15:57:12,217 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:57:12,217 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:57:12,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:12,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:12,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:12,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:12,388 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:57:12,389 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/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) [2020-12-01 15:57:12,406 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:57:12,406 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:12,431 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:57:12,431 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#t~ret7=0} Honda state: {gcd_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:57:12,482 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:57:12,482 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:12,545 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:57:12,546 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:57:13,072 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:57:13,074 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:57:13,074 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:57:13,075 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:57:13,075 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:57:13,075 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:57:13,075 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:13,075 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:57:13,075 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:57:13,075 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration3_Loop [2020-12-01 15:57:13,075 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:57:13,075 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:57:13,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:13,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:13,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:13,101 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:57:13,204 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:57:13,205 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/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) [2020-12-01 15:57:13,212 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 15:57:13,214 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:57:13,214 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:57:13,214 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:57:13,214 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:57:13,214 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:57:13,215 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:57:13,215 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:13,230 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:57:13,270 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 15:57:13,272 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:57:13,273 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:57:13,273 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:57:13,273 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:57:13,273 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:57:13,276 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:57:13,277 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:13,297 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:57:13,311 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-12-01 15:57:13,311 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_7dd5371e-8f27-4d0d-a746-5b9c8edc1583/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) [2020-12-01 15:57:13,318 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:57:13,318 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:57:13,319 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:57:13,319 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:57:13,351 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:57:13,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:57:13,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:13,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:57:13,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:57:13,546 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 [2020-12-01 15:57:13,547 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-12-01 15:57:13,590 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 46 states and 51 transitions. Complement of second has 11 states. [2020-12-01 15:57:13,590 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 [2020-12-01 15:57:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-12-01 15:57:13,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-12-01 15:57:13,594 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-12-01 15:57:13,594 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:13,594 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:57:13,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:13,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:57:13,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:13,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:57:13,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:57:13,747 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2020-12-01 15:57:13,747 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-12-01 15:57:13,779 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 46 states and 51 transitions. Complement of second has 11 states. [2020-12-01 15:57:13,780 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 [2020-12-01 15:57:13,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-12-01 15:57:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-12-01 15:57:13,782 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-12-01 15:57:13,782 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:13,782 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:57:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:57:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:13,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:57:13,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:57:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:57:13,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:57:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:57:13,935 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 3 loop predicates [2020-12-01 15:57:13,935 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-12-01 15:57:13,984 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 75 states and 86 transitions. Complement of second has 12 states. [2020-12-01 15:57:13,985 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 [2020-12-01 15:57:13,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-12-01 15:57:13,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-12-01 15:57:13,986 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 5 letters. [2020-12-01 15:57:13,986 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:13,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 16 letters. Loop has 5 letters. [2020-12-01 15:57:13,988 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:13,988 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 10 letters. [2020-12-01 15:57:13,991 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:57:13,991 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 75 states and 86 transitions. [2020-12-01 15:57:14,000 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-12-01 15:57:14,001 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 75 states to 0 states and 0 transitions. [2020-12-01 15:57:14,001 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-12-01 15:57:14,001 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-12-01 15:57:14,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-12-01 15:57:14,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-12-01 15:57:14,001 INFO L692 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:57:14,001 INFO L715 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:57:14,001 INFO L595 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:57:14,001 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-12-01 15:57:14,001 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-12-01 15:57:14,002 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-12-01 15:57:14,002 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-12-01 15:57:14,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.12 03:57:14 BoogieIcfgContainer [2020-12-01 15:57:14,007 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-12-01 15:57:14,009 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:57:14,010 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:57:14,010 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:57:14,010 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:57:05" (3/4) ... [2020-12-01 15:57:14,015 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-01 15:57:14,015 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:57:14,018 INFO L168 Benchmark]: Toolchain (without parser) took 9908.81 ms. Allocated memory was 111.1 MB in the beginning and 159.4 MB in the end (delta: 48.2 MB). Free memory was 85.7 MB in the beginning and 115.4 MB in the end (delta: -29.7 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:57:14,019 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 77.6 MB. Free memory is still 42.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:57:14,024 INFO L168 Benchmark]: CACSL2BoogieTranslator took 457.23 ms. Allocated memory is still 111.1 MB. Free memory was 85.5 MB in the beginning and 88.1 MB in the end (delta: -2.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:57:14,025 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.53 ms. Allocated memory is still 111.1 MB. Free memory was 88.1 MB in the beginning and 86.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:57:14,025 INFO L168 Benchmark]: Boogie Preprocessor took 63.83 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 85.7 MB in the end (delta: 892.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:57:14,026 INFO L168 Benchmark]: RCFGBuilder took 528.41 ms. Allocated memory is still 111.1 MB. Free memory was 85.7 MB in the beginning and 73.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:57:14,026 INFO L168 Benchmark]: BuchiAutomizer took 8780.24 ms. Allocated memory was 111.1 MB in the beginning and 159.4 MB in the end (delta: 48.2 MB). Free memory was 73.1 MB in the beginning and 116.4 MB in the end (delta: -43.3 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:57:14,027 INFO L168 Benchmark]: Witness Printer took 5.34 ms. Allocated memory is still 159.4 MB. Free memory was 116.4 MB in the beginning and 115.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:57:14,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 77.6 MB. Free memory is still 42.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 457.23 ms. Allocated memory is still 111.1 MB. Free memory was 85.5 MB in the beginning and 88.1 MB in the end (delta: -2.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.53 ms. Allocated memory is still 111.1 MB. Free memory was 88.1 MB in the beginning and 86.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.83 ms. Allocated memory is still 111.1 MB. Free memory was 86.6 MB in the beginning and 85.7 MB in the end (delta: 892.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 528.41 ms. Allocated memory is still 111.1 MB. Free memory was 85.7 MB in the beginning and 73.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 8780.24 ms. Allocated memory was 111.1 MB in the beginning and 159.4 MB in the end (delta: 48.2 MB). Free memory was 73.1 MB in the beginning and 116.4 MB in the end (delta: -43.3 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * Witness Printer took 5.34 ms. Allocated memory is still 159.4 MB. Free memory was 116.4 MB in the beginning and 115.4 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 3 terminating modules (0 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(y1) and consists of 7 locations. One deterministic module has affine ranking function y2 and consists of 4 locations. One nondeterministic module has affine ranking function y2 and consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.7s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 6.7s. Construction of modules took 0.2s. Büchi inclusion checks took 1.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 26 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 52 SDtfs, 77 SDslu, 9 SDs, 0 SdLazy, 124 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital22 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq177 hnf91 smp89 dnf100 smp100 tf106 neg98 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 29ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...