./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-numeric/gcd01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-numeric/gcd01-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 35b25a6a3a2357b1d567ba04985a13ceb918bed2 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:37:26,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:37:26,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:37:26,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:37:26,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:37:26,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:37:26,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:37:26,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:37:26,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:37:26,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:37:26,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:37:26,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:37:26,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:37:26,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:37:26,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:37:26,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:37:26,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:37:26,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:37:26,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:37:26,565 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:37:26,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:37:26,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:37:26,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:37:26,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:37:26,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:37:26,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:37:26,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:37:26,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:37:26,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:37:26,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:37:26,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:37:26,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:37:26,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:37:26,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:37:26,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:37:26,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:37:26,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:37:26,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:37:26,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:37:26,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:37:26,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:37:26,590 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-30 00:37:26,616 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:37:26,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:37:26,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:37:26,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:37:26,618 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:37:26,619 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-30 00:37:26,619 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-30 00:37:26,619 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-30 00:37:26,619 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-30 00:37:26,620 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-30 00:37:26,620 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-30 00:37:26,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:37:26,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:37:26,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:37:26,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:37:26,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-30 00:37:26,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-30 00:37:26,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-30 00:37:26,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:37:26,622 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-30 00:37:26,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:37:26,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-30 00:37:26,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:37:26,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:37:26,623 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-30 00:37:26,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:37:26,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:37:26,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:37:26,624 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-30 00:37:26,625 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-30 00:37:26,626 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_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35b25a6a3a2357b1d567ba04985a13ceb918bed2 [2020-11-30 00:37:26,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:37:26,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:37:26,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:37:26,936 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:37:26,936 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:37:26,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/../../sv-benchmarks/c/termination-numeric/gcd01-2.c [2020-11-30 00:37:27,013 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/data/b25c5568b/11ed20c9e9464da6ad7036ef068d3655/FLAG94d5ad8cc [2020-11-30 00:37:27,646 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:37:27,646 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/sv-benchmarks/c/termination-numeric/gcd01-2.c [2020-11-30 00:37:27,659 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/data/b25c5568b/11ed20c9e9464da6ad7036ef068d3655/FLAG94d5ad8cc [2020-11-30 00:37:27,686 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/data/b25c5568b/11ed20c9e9464da6ad7036ef068d3655 [2020-11-30 00:37:27,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:37:27,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:37:27,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:37:27,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:37:27,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:37:27,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:37:27" (1/1) ... [2020-11-30 00:37:27,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f07cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:27, skipping insertion in model container [2020-11-30 00:37:27,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:37:27" (1/1) ... [2020-11-30 00:37:27,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:37:27,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:37:28,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:37:28,029 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:37:28,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:37:28,070 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:37:28,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28 WrapperNode [2020-11-30 00:37:28,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:37:28,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:37:28,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:37:28,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:37:28,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... [2020-11-30 00:37:28,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... [2020-11-30 00:37:28,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:37:28,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:37:28,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:37:28,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:37:28,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... [2020-11-30 00:37:28,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... [2020-11-30 00:37:28,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... [2020-11-30 00:37:28,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... [2020-11-30 00:37:28,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... [2020-11-30 00:37:28,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... [2020-11-30 00:37:28,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... [2020-11-30 00:37:28,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:37:28,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:37:28,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:37:28,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:37:28,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:28,240 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-11-30 00:37:28,240 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-11-30 00:37:28,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:37:28,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:37:28,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:37:28,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:37:28,525 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:37:28,528 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:37:28,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:37:28 BoogieIcfgContainer [2020-11-30 00:37:28,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:37:28,546 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-30 00:37:28,546 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-30 00:37:28,549 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-30 00:37:28,550 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:37:28,563 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 30.11 12:37:27" (1/3) ... [2020-11-30 00:37:28,564 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4f9eb9ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:37:28, skipping insertion in model container [2020-11-30 00:37:28,564 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:37:28,564 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:37:28" (2/3) ... [2020-11-30 00:37:28,565 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4f9eb9ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:37:28, skipping insertion in model container [2020-11-30 00:37:28,565 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:37:28,565 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:37:28" (3/3) ... [2020-11-30 00:37:28,566 INFO L373 chiAutomizerObserver]: Analyzing ICFG gcd01-2.c [2020-11-30 00:37:28,623 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-30 00:37:28,623 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-30 00:37:28,623 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-30 00:37:28,623 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:37:28,623 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:37:28,624 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-30 00:37:28,624 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:37:28,624 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-30 00:37:28,637 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-11-30 00:37:28,656 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-30 00:37:28,656 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:37:28,657 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:37:28,663 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-11-30 00:37:28,663 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-30 00:37:28,664 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-30 00:37:28,664 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-11-30 00:37:28,666 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-30 00:37:28,666 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:37:28,667 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:37:28,667 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-11-30 00:37:28,667 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-30 00:37:28,673 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_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 24#L36true assume !(main_~n~0 <= 0); 8#L39true call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 3#gcdENTRYtrue [2020-11-30 00:37:28,674 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 [2020-11-30 00:37:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:28,681 INFO L82 PathProgramCache]: Analyzing trace with hash 45873353, now seen corresponding path program 1 times [2020-11-30 00:37:28,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:37:28,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566014713] [2020-11-30 00:37:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:37:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:28,799 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:28,820 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:28,841 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:37:28,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:28,843 INFO L82 PathProgramCache]: Analyzing trace with hash 28756389, now seen corresponding path program 1 times [2020-11-30 00:37:28,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:37:28,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199263369] [2020-11-30 00:37:28,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:37:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:28,857 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:28,863 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:28,884 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:37:28,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:28,887 INFO L82 PathProgramCache]: Analyzing trace with hash 50269661, now seen corresponding path program 1 times [2020-11-30 00:37:28,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:37:28,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561944826] [2020-11-30 00:37:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:37:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:28,945 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:28,991 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:28,998 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:37:29,196 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:37:29,196 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:37:29,197 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:37:29,197 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:37:29,197 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:37:29,197 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:29,197 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:37:29,197 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:37:29,198 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration1_Loop [2020-11-30 00:37:29,198 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:37:29,198 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:37:29,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,225 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,253 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,258 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,347 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:37:29,348 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:37:29,359 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:37:29,360 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 [2020-11-30 00:37:29,369 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:37:29,369 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_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:37:29,414 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:37:29,414 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:37:29,462 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:37:29,462 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:29,647 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:37:29,650 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:37:29,650 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:37:29,650 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:37:29,651 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:37:29,651 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:37:29,651 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:29,651 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:37:29,651 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:37:29,651 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration1_Loop [2020-11-30 00:37:29,651 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:37:29,652 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:37:29,653 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,681 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:29,788 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:37:29,793 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:37:29,802 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:37:29,805 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:37:29,805 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:37:29,806 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:37:29,806 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:37:29,806 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:37:29,808 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:37:29,808 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:29,811 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:29,854 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:37:29,856 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:37:29,856 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:37:29,856 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:37:29,856 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:37:29,857 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:37:29,859 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:37:29,859 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:37:29,865 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:29,908 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:37:29,910 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:37:29,910 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:37:29,910 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:37:29,910 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:37:29,910 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:37:29,917 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:37:29,917 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:37:29,922 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:37:29,932 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:37:29,933 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_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/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) [2020-11-30 00:37:29,971 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:37:29,971 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:37:29,971 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:37:29,972 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 [2020-11-30 00:37:30,008 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:37:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:30,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:37:30,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:37:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:37:30,197 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 [2020-11-30 00:37:30,198 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states. Second operand 5 states. [2020-11-30 00:37:30,448 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. [2020-11-30 00:37:30,451 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 [2020-11-30 00:37:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 00:37:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 25 transitions. [2020-11-30 00:37:30,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 5 letters. [2020-11-30 00:37:30,459 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:30,459 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 10 letters. Loop has 5 letters. [2020-11-30 00:37:30,459 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:30,459 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 10 letters. [2020-11-30 00:37:30,460 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:30,461 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 95 states and 131 transitions. [2020-11-30 00:37:30,484 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-30 00:37:30,490 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 95 states to 36 states and 41 transitions. [2020-11-30 00:37:30,492 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-30 00:37:30,492 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2020-11-30 00:37:30,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 41 transitions. [2020-11-30 00:37:30,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:37:30,493 INFO L691 BuchiCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-11-30 00:37:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states and 41 transitions. [2020-11-30 00:37:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 18. [2020-11-30 00:37:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 00:37:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-30 00:37:30,527 INFO L714 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-30 00:37:30,527 INFO L594 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-30 00:37:30,527 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-30 00:37:30,528 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 21 transitions. [2020-11-30 00:37:30,529 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-30 00:37:30,530 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:37:30,530 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:37:30,530 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-11-30 00:37:30,531 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-30 00:37:30,531 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_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 218#L36 assume !(main_~n~0 <= 0); 210#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 222#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 207#L18 [2020-11-30 00:37:30,531 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 [2020-11-30 00:37:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1422073943, now seen corresponding path program 1 times [2020-11-30 00:37:30,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:37:30,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632780718] [2020-11-30 00:37:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:37:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:30,567 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:30,579 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:30,583 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:37:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:30,584 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 1 times [2020-11-30 00:37:30,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:37:30,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34567559] [2020-11-30 00:37:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:37:30,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:30,590 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:30,595 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:30,596 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:37:30,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1558362436, now seen corresponding path program 1 times [2020-11-30 00:37:30,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:37:30,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022338647] [2020-11-30 00:37:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:37:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:30,614 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:30,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:30,682 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:37:30,817 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:37:30,817 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:37:30,817 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:37:30,817 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:37:30,817 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:37:30,818 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:30,818 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:37:30,818 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:37:30,818 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration2_Loop [2020-11-30 00:37:30,818 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:37:30,818 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:37:30,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:30,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:30,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:30,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:30,978 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-11-30 00:37:31,030 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:37:31,030 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/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) [2020-11-30 00:37:31,037 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:37:31,037 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_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:37:31,098 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:37:31,099 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:33,088 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:37:33,094 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:37:33,094 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:37:33,094 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:37:33,094 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:37:33,094 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:37:33,094 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:33,095 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:37:33,095 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:37:33,095 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration2_Loop [2020-11-30 00:37:33,095 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:37:33,095 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:37:33,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:33,131 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:33,137 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:33,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:33,261 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-11-30 00:37:33,338 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:37:33,338 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/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 [2020-11-30 00:37:33,342 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:37:33,344 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:37:33,344 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:37:33,344 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:37:33,344 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:37:33,344 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:37:33,348 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:37:33,348 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:37:33,353 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:37:33,358 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:37:33,359 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_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:33,364 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:37:33,364 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:37:33,364 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:37:33,364 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] [2020-11-30 00:37:33,386 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:37:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:33,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:37:33,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:33,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:37:33,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:37:33,521 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-30 00:37:33,522 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5 Second operand 4 states. [2020-11-30 00:37:33,563 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. [2020-11-30 00:37:33,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:37:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:37:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-30 00:37:33,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 5 letters. [2020-11-30 00:37:33,565 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:33,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-11-30 00:37:33,565 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:33,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 10 letters. [2020-11-30 00:37:33,566 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:33,566 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 61 transitions. [2020-11-30 00:37:33,568 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-30 00:37:33,569 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 33 states and 37 transitions. [2020-11-30 00:37:33,570 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-30 00:37:33,570 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-30 00:37:33,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 37 transitions. [2020-11-30 00:37:33,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:37:33,570 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-11-30 00:37:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 37 transitions. [2020-11-30 00:37:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-11-30 00:37:33,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 00:37:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-11-30 00:37:33,574 INFO L714 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-30 00:37:33,574 INFO L594 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-30 00:37:33,574 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-30 00:37:33,574 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 28 transitions. [2020-11-30 00:37:33,575 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-30 00:37:33,575 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:37:33,575 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:37:33,576 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:37:33,576 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-30 00:37:33,576 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_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 354#L36 assume !(main_~n~0 <= 0); 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 [2020-11-30 00:37:33,576 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 [2020-11-30 00:37:33,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:33,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1558359491, now seen corresponding path program 2 times [2020-11-30 00:37:33,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:37:33,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449295447] [2020-11-30 00:37:33,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:37:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:33,591 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:33,603 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:33,608 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:37:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:33,608 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 2 times [2020-11-30 00:37:33,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:37:33,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131364754] [2020-11-30 00:37:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:37:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:33,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:33,634 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:33,635 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:37:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:33,641 INFO L82 PathProgramCache]: Analyzing trace with hash -474042536, now seen corresponding path program 1 times [2020-11-30 00:37:33,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:37:33,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299055607] [2020-11-30 00:37:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:37:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:33,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:37:33,682 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:37:33,692 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:37:33,811 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:37:33,812 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:37:33,812 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:37:33,812 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:37:33,812 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:37:33,812 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:33,812 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:37:33,812 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:37:33,812 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration3_Loop [2020-11-30 00:37:33,812 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:37:33,813 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:37:33,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:33,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:33,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:33,852 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:33,965 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:37:33,965 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/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) [2020-11-30 00:37:33,977 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:37:33,977 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 [2020-11-30 00:37:33,981 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:37:33,982 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_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:34,007 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:37:34,007 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/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 [2020-11-30 00:37:34,049 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:37:34,049 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:37:34,570 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:37:34,572 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:37:34,572 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:37:34,572 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:37:34,572 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:37:34,572 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:37:34,572 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:34,573 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:37:34,573 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:37:34,573 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration3_Loop [2020-11-30 00:37:34,573 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:37:34,573 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:37:34,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:34,586 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:34,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:34,659 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:37:34,782 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:37:34,783 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:37:34,798 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:37:34,801 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:37:34,801 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:37:34,802 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:37:34,802 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:37:34,802 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:37:34,803 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:37:34,803 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 [2020-11-30 00:37:34,806 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:37:34,855 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:37:34,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:37:34,857 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:37:34,858 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:37:34,858 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:37:34,858 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:37:34,861 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:37:34,862 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:37:34,869 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:37:34,873 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-30 00:37:34,874 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_b550c080-5d42-4ac2-a07e-4fe4b0dfdedf/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:37:34,881 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:37:34,881 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:37:34,882 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:37:34,882 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 [2020-11-30 00:37:34,918 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:37:34,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:34,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:37:34,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:34,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:37:34,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:37:35,052 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-30 00:37:35,052 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-30 00:37:35,084 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. [2020-11-30 00:37:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:37:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:37:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-30 00:37:35,086 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-11-30 00:37:35,086 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:35,086 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:37:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:35,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:37:35,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:35,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:37:35,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:37:35,200 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 [2020-11-30 00:37:35,200 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-30 00:37:35,231 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. [2020-11-30 00:37:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:37:35,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:37:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-30 00:37:35,233 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-11-30 00:37:35,233 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:35,233 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:37:35,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:37:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:37:35,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:37:35,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:37:35,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:37:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:37:35,390 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 [2020-11-30 00:37:35,390 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-30 00:37:35,440 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. [2020-11-30 00:37:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:37:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:37:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-11-30 00:37:35,445 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 5 letters. [2020-11-30 00:37:35,445 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:35,445 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 16 letters. Loop has 5 letters. [2020-11-30 00:37:35,445 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:35,445 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 10 letters. [2020-11-30 00:37:35,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:37:35,457 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 75 states and 86 transitions. [2020-11-30 00:37:35,459 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:37:35,459 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 75 states to 0 states and 0 transitions. [2020-11-30 00:37:35,459 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-30 00:37:35,459 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-30 00:37:35,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-30 00:37:35,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 00:37:35,460 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:37:35,460 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:37:35,460 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:37:35,460 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-30 00:37:35,460 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:37:35,460 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:37:35,461 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-30 00:37:35,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 30.11 12:37:35 BoogieIcfgContainer [2020-11-30 00:37:35,466 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-30 00:37:35,467 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:37:35,467 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:37:35,467 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:37:35,468 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:37:28" (3/4) ... [2020-11-30 00:37:35,471 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 00:37:35,471 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:37:35,472 INFO L168 Benchmark]: Toolchain (without parser) took 7777.85 ms. Allocated memory was 100.7 MB in the beginning and 151.0 MB in the end (delta: 50.3 MB). Free memory was 73.2 MB in the beginning and 124.5 MB in the end (delta: -51.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:37:35,473 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory is still 60.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:37:35,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.88 ms. Allocated memory is still 100.7 MB. Free memory was 73.0 MB in the beginning and 77.4 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:37:35,474 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.23 ms. Allocated memory is still 100.7 MB. Free memory was 77.4 MB in the beginning and 75.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:37:35,475 INFO L168 Benchmark]: Boogie Preprocessor took 40.93 ms. Allocated memory is still 100.7 MB. Free memory was 75.8 MB in the beginning and 75.1 MB in the end (delta: 741.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:37:35,475 INFO L168 Benchmark]: RCFGBuilder took 375.80 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 62.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-30 00:37:35,476 INFO L168 Benchmark]: BuchiAutomizer took 6920.70 ms. Allocated memory was 100.7 MB in the beginning and 151.0 MB in the end (delta: 50.3 MB). Free memory was 62.6 MB in the beginning and 125.4 MB in the end (delta: -62.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:37:35,476 INFO L168 Benchmark]: Witness Printer took 4.30 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 124.5 MB in the end (delta: 897.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:37:35,480 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 100.7 MB. Free memory is still 60.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 373.88 ms. Allocated memory is still 100.7 MB. Free memory was 73.0 MB in the beginning and 77.4 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.23 ms. Allocated memory is still 100.7 MB. Free memory was 77.4 MB in the beginning and 75.8 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.93 ms. Allocated memory is still 100.7 MB. Free memory was 75.8 MB in the beginning and 75.1 MB in the end (delta: 741.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 375.80 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 62.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 6920.70 ms. Allocated memory was 100.7 MB in the beginning and 151.0 MB in the end (delta: 50.3 MB). Free memory was 62.6 MB in the beginning and 125.4 MB in the end (delta: -62.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.30 ms. Allocated memory is still 151.0 MB. Free memory was 125.4 MB in the beginning and 124.5 MB in the end (delta: 897.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (0 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \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 6.8s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 5.5s. Construction of modules took 0.1s. Büchi inclusion checks took 0.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 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, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital26 mio100 ax100 hnf85 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq177 hnf91 smp89 dnf100 smp100 tf106 neg98 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.9s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...