./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 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-numeric/gcd01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 0.1.25-906a4fb [2020-10-19 18:41:56,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:41:56,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:41:56,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:41:56,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:41:56,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:41:56,594 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:41:56,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:41:56,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:41:56,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:41:56,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:41:56,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:41:56,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:41:56,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:41:56,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:41:56,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:41:56,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:41:56,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:41:56,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:41:56,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:41:56,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:41:56,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:41:56,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:41:56,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:41:56,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:41:56,618 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:41:56,618 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:41:56,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:41:56,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:41:56,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:41:56,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:41:56,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:41:56,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:41:56,624 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:41:56,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:41:56,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:41:56,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:41:56,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:41:56,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:41:56,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:41:56,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:41:56,629 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:41:56,654 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:41:56,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:41:56,656 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:41:56,656 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:41:56,656 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:41:56,657 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:41:56,657 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:41:56,657 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:41:56,657 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:41:56,658 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:41:56,658 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:41:56,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:41:56,659 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:41:56,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:41:56,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:41:56,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:41:56,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:41:56,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:41:56,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:41:56,660 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:41:56,661 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:41:56,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:41:56,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:41:56,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:41:56,662 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:41:56,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:41:56,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:41:56,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:41:56,663 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:41:56,664 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:41:56,664 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 [2020-10-19 18:41:57,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:41:57,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:41:57,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:41:57,031 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:41:57,034 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:41:57,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/gcd01-2.c [2020-10-19 18:41:57,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece309e7e/744b77f7040d490d8805e06b9def7c27/FLAG5fb101941 [2020-10-19 18:41:57,565 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:41:57,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/gcd01-2.c [2020-10-19 18:41:57,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece309e7e/744b77f7040d490d8805e06b9def7c27/FLAG5fb101941 [2020-10-19 18:41:57,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece309e7e/744b77f7040d490d8805e06b9def7c27 [2020-10-19 18:41:57,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:41:57,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:41:57,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:41:57,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:41:57,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:41:57,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:41:57" (1/1) ... [2020-10-19 18:41:57,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e3c677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:57, skipping insertion in model container [2020-10-19 18:41:57,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:41:57" (1/1) ... [2020-10-19 18:41:57,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:41:57,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:41:58,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:41:58,183 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:41:58,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:41:58,220 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:41:58,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58 WrapperNode [2020-10-19 18:41:58,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:41:58,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:41:58,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:41:58,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:41:58,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... [2020-10-19 18:41:58,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... [2020-10-19 18:41:58,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:41:58,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:41:58,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:41:58,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:41:58,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... [2020-10-19 18:41:58,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... [2020-10-19 18:41:58,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... [2020-10-19 18:41:58,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... [2020-10-19 18:41:58,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... [2020-10-19 18:41:58,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... [2020-10-19 18:41:58,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... [2020-10-19 18:41:58,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:41:58,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:41:58,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:41:58,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:41:58,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-19 18:41:58,421 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-10-19 18:41:58,422 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-10-19 18:41:58,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:41:58,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:41:58,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:41:58,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:41:58,714 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:41:58,714 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 18:41:58,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:58 BoogieIcfgContainer [2020-10-19 18:41:58,716 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:41:58,717 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:41:58,717 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:41:58,721 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:41:58,722 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:58,722 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:41:57" (1/3) ... [2020-10-19 18:41:58,725 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@145ddaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:41:58, skipping insertion in model container [2020-10-19 18:41:58,726 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:58,726 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:41:58" (2/3) ... [2020-10-19 18:41:58,727 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@145ddaaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:41:58, skipping insertion in model container [2020-10-19 18:41:58,727 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:41:58,727 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:58" (3/3) ... [2020-10-19 18:41:58,729 INFO L373 chiAutomizerObserver]: Analyzing ICFG gcd01-2.c [2020-10-19 18:41:58,781 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:41:58,782 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:41:58,782 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:41:58,782 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:41:58,782 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:41:58,782 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:41:58,783 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:41:58,783 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:41:58,803 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-10-19 18:41:58,831 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-19 18:41:58,831 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:58,832 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:58,839 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 18:41:58,839 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-19 18:41:58,839 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:41:58,840 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-10-19 18:41:58,842 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-10-19 18:41:58,843 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:41:58,843 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:41:58,843 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-19 18:41:58,843 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-19 18:41:58,850 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 15#L32true assume !(main_~m~0 <= 0);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 24#L36true assume !(main_~n~0 <= 0); 8#L39true call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 3#gcdENTRYtrue [2020-10-19 18:41:58,850 INFO L796 eck$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 [2020-10-19 18:41:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash 45873353, now seen corresponding path program 1 times [2020-10-19 18:41:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:58,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698645636] [2020-10-19 18:41:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:58,967 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:58,986 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:59,011 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash 28756389, now seen corresponding path program 1 times [2020-10-19 18:41:59,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:59,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192652700] [2020-10-19 18:41:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:59,024 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:59,029 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:59,032 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:59,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash 50269661, now seen corresponding path program 1 times [2020-10-19 18:41:59,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:41:59,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728112051] [2020-10-19 18:41:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:41:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:59,060 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:41:59,099 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:41:59,112 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:41:59,250 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:59,251 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:59,251 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:59,252 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:59,252 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:41:59,252 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:59,252 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:59,252 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:59,253 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration1_Loop [2020-10-19 18:41:59,253 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:59,253 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:59,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,369 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:59,370 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:59,377 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:59,377 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 [2020-10-19 18:41:59,387 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:41:59,387 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:59,413 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:41:59,414 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:59,452 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:41:59,453 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:41:59,586 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:41:59,588 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:41:59,588 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:41:59,589 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:41:59,589 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:41:59,589 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:41:59,589 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:59,589 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:41:59,589 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:41:59,589 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration1_Loop [2020-10-19 18:41:59,590 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:41:59,590 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:41:59,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,605 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:41:59,679 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:41:59,685 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:59,696 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 [2020-10-19 18:41:59,698 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:59,698 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:59,699 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:59,699 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:59,700 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:59,702 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:59,702 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 [2020-10-19 18:41:59,705 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:59,744 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 [2020-10-19 18:41:59,746 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:59,746 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:59,746 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:59,747 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:59,747 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:59,748 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:59,748 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:59,750 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:41:59,788 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 [2020-10-19 18:41:59,790 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:41:59,790 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:41:59,790 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:41:59,790 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:41:59,791 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:41:59,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:41:59,793 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:59,802 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:41:59,808 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:41:59,808 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:41:59,817 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:41:59,818 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:41:59,818 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:41:59,819 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_#in~y1) = 1*gcd_#in~y1 Supporting invariants [] [2020-10-19 18:41:59,856 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:41:59,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:41:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:59,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:41:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:41:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:41:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:41:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:42:00,008 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 [2020-10-19 18:42:00,010 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states. Second operand 5 states. [2020-10-19 18:42:00,208 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. [2020-10-19 18:42:00,209 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 [2020-10-19 18:42:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 18:42:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 25 transitions. [2020-10-19 18:42:00,215 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 5 letters. [2020-10-19 18:42:00,217 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:00,217 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 10 letters. Loop has 5 letters. [2020-10-19 18:42:00,218 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:00,218 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 25 transitions. Stem has 5 letters. Loop has 10 letters. [2020-10-19 18:42:00,218 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:00,219 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 95 states and 131 transitions. [2020-10-19 18:42:00,229 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 18:42:00,236 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 95 states to 36 states and 41 transitions. [2020-10-19 18:42:00,237 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-19 18:42:00,238 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2020-10-19 18:42:00,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 41 transitions. [2020-10-19 18:42:00,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:42:00,239 INFO L691 BuchiCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-10-19 18:42:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states and 41 transitions. [2020-10-19 18:42:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 18. [2020-10-19 18:42:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-19 18:42:00,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-19 18:42:00,272 INFO L714 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-19 18:42:00,272 INFO L594 BuchiCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-19 18:42:00,272 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 18:42:00,272 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 21 transitions. [2020-10-19 18:42:00,273 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 18:42:00,273 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:42:00,274 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:42:00,274 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-10-19 18:42:00,274 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-19 18:42:00,275 INFO L794 eck$LassoCheckResult]: Stem: 217#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 205#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 206#L32 assume !(main_~m~0 <= 0);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 218#L36 assume !(main_~n~0 <= 0); 210#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 222#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 207#L18 [2020-10-19 18:42:00,275 INFO L796 eck$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 [2020-10-19 18:42:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:00,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1422073943, now seen corresponding path program 1 times [2020-10-19 18:42:00,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:00,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304843177] [2020-10-19 18:42:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:00,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:00,302 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:00,310 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:00,311 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 1 times [2020-10-19 18:42:00,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:00,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11807141] [2020-10-19 18:42:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:00,328 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:00,337 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:00,342 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1558362436, now seen corresponding path program 1 times [2020-10-19 18:42:00,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:00,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3041050] [2020-10-19 18:42:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:00,376 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:00,401 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:00,411 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:00,500 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:42:00,500 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:42:00,500 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:42:00,500 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:42:00,501 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:42:00,501 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:00,501 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:42:00,501 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:42:00,502 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration2_Loop [2020-10-19 18:42:00,502 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:42:00,502 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:42:00,504 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:00,520 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:00,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:00,526 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:00,635 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:42:00,636 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:42:00,640 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:42:00,640 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:42:00,693 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:42:00,693 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 [2020-10-19 18:42:02,500 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:42:02,503 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:42:02,503 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:42:02,503 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:42:02,503 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:42:02,503 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:42:02,503 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:02,504 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:42:02,504 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:42:02,504 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration2_Loop [2020-10-19 18:42:02,504 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:42:02,504 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:42:02,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:02,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:02,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:02,540 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:02,651 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:42:02,651 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:42:02,661 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 Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:02,663 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:42:02,663 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:42:02,663 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:42:02,663 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:42:02,663 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:42:02,666 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:42:02,666 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:42:02,671 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:42:02,677 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 18:42:02,678 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:42:02,690 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:42:02,690 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:42:02,690 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:42:02,690 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:02,718 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:42:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:02,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:42:02,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:42:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:42:02,835 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 [2020-10-19 18:42:02,835 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 21 transitions. cyclomatic complexity: 5 Second operand 4 states. [2020-10-19 18:42:02,865 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. [2020-10-19 18:42:02,866 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 [2020-10-19 18:42:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:42:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-10-19 18:42:02,867 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 5 letters. [2020-10-19 18:42:02,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:02,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-10-19 18:42:02,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:02,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 6 letters. Loop has 10 letters. [2020-10-19 18:42:02,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:02,869 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 61 transitions. [2020-10-19 18:42:02,871 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 18:42:02,872 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 33 states and 37 transitions. [2020-10-19 18:42:02,872 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-10-19 18:42:02,872 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-10-19 18:42:02,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 37 transitions. [2020-10-19 18:42:02,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 18:42:02,873 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-19 18:42:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 37 transitions. [2020-10-19 18:42:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2020-10-19 18:42:02,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-19 18:42:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-19 18:42:02,877 INFO L714 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-19 18:42:02,877 INFO L594 BuchiCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-19 18:42:02,877 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 18:42:02,877 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 28 transitions. [2020-10-19 18:42:02,878 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 18:42:02,878 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:42:02,878 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:42:02,879 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:42:02,879 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-10-19 18:42:02,879 INFO L794 eck$LassoCheckResult]: Stem: 353#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(10);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 339#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~nondet10, main_#t~ret11, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet9;havoc main_#t~nondet9; 340#L32 assume !(main_~m~0 <= 0);main_~n~0 := main_#t~nondet10;havoc main_#t~nondet10; 354#L36 assume !(main_~n~0 <= 0); 342#L39 call main_#t~ret11 := gcd(main_~m~0, main_~n~0);< 341#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 343#L18 assume !(~y1 <= 0 || ~y2 <= 0); 358#L21 assume !(~y1 == ~y2); 356#L24 assume ~y1 > ~y2; 347#L25 call #t~ret7 := gcd(~y1 - ~y2, ~y2);< 357#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 346#L18 [2020-10-19 18:42:02,879 INFO L796 eck$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 [2020-10-19 18:42:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1558359491, now seen corresponding path program 2 times [2020-10-19 18:42:02,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:02,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548275284] [2020-10-19 18:42:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:02,892 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:02,903 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:02,907 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash 32576474, now seen corresponding path program 2 times [2020-10-19 18:42:02,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:02,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758949789] [2020-10-19 18:42:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:02,913 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:02,917 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:02,918 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash -474042536, now seen corresponding path program 1 times [2020-10-19 18:42:02,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:42:02,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744862331] [2020-10-19 18:42:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:42:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:02,933 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:42:02,947 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:42:02,952 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:42:03,064 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:42:03,065 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:42:03,065 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:42:03,065 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:42:03,065 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 18:42:03,065 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:03,065 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:42:03,065 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:42:03,066 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration3_Loop [2020-10-19 18:42:03,066 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:42:03,066 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:42:03,068 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:03,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:03,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:03,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:03,187 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:42:03,188 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:03,193 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:42:03,193 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:42:03,197 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 18:42:03,198 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 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-19 18:42:03,232 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 18:42:03,233 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-19 18:42:03,285 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 18:42:03,285 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 18:42:03,760 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 18:42:03,763 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 18:42:03,763 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 18:42:03,763 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 18:42:03,763 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 18:42:03,763 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 18:42:03,763 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:03,763 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 18:42:03,763 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 18:42:03,763 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration3_Loop [2020-10-19 18:42:03,764 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 18:42:03,764 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 18:42:03,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:03,772 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:03,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:03,796 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 18:42:03,865 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 18:42:03,865 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 18:42:03,876 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 [2020-10-19 18:42:03,877 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:42:03,878 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:42:03,878 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:42:03,878 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:42:03,878 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:42:03,879 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:42:03,879 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 [2020-10-19 18:42:03,883 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:03,913 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 [2020-10-19 18:42:03,915 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 18:42:03,915 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 18:42:03,915 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 18:42:03,915 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 18:42:03,916 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 18:42:03,924 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 18:42:03,924 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 18:42:03,929 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 18:42:03,932 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 18:42:03,932 INFO L444 ModelExtractionUtils]: 4 out of 6 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 18:42:03,941 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 18:42:03,941 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 18:42:03,942 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 18:42:03,942 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] [2020-10-19 18:42:03,978 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 18:42:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:04,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:42:04,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:04,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:42:04,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:42:04,083 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 [2020-10-19 18:42:04,083 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-10-19 18:42:04,114 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. [2020-10-19 18:42:04,114 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 [2020-10-19 18:42:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:42:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-10-19 18:42:04,115 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-10-19 18:42:04,116 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:04,116 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:42:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:04,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:42:04,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:04,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:42:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:42:04,204 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 [2020-10-19 18:42:04,204 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-10-19 18:42:04,226 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. [2020-10-19 18:42:04,226 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 [2020-10-19 18:42:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:42:04,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-10-19 18:42:04,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 11 letters. Loop has 5 letters. [2020-10-19 18:42:04,227 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:04,227 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 18:42:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:42:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:04,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:42:04,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:42:04,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 18:42:04,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:42:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:42:04,314 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 [2020-10-19 18:42:04,314 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 28 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-10-19 18:42:04,341 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. [2020-10-19 18:42:04,342 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 [2020-10-19 18:42:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 18:42:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-10-19 18:42:04,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 5 letters. [2020-10-19 18:42:04,343 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:04,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 16 letters. Loop has 5 letters. [2020-10-19 18:42:04,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:04,344 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 11 letters. Loop has 10 letters. [2020-10-19 18:42:04,345 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 18:42:04,345 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 75 states and 86 transitions. [2020-10-19 18:42:04,348 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:42:04,348 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 75 states to 0 states and 0 transitions. [2020-10-19 18:42:04,348 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 18:42:04,348 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 18:42:04,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 18:42:04,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 18:42:04,349 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:42:04,349 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:42:04,349 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 18:42:04,349 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 18:42:04,350 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 18:42:04,350 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 18:42:04,350 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 18:42:04,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:42:04 BoogieIcfgContainer [2020-10-19 18:42:04,357 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:42:04,358 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:42:04,358 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:42:04,358 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:42:04,359 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:41:58" (3/4) ... [2020-10-19 18:42:04,362 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:42:04,363 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:42:04,365 INFO L168 Benchmark]: Toolchain (without parser) took 6430.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 205.0 MB). Free memory was 958.6 MB in the beginning and 1.1 GB in the end (delta: -132.2 MB). Peak memory consumption was 72.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:04,366 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:42:04,367 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.27 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:04,368 INFO L168 Benchmark]: Boogie Procedure Inliner took 93.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:04,369 INFO L168 Benchmark]: Boogie Preprocessor took 38.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:04,369 INFO L168 Benchmark]: RCFGBuilder took 362.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:04,370 INFO L168 Benchmark]: BuchiAutomizer took 5640.15 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.0 MB). Peak memory consumption was 83.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:42:04,371 INFO L168 Benchmark]: Witness Printer took 4.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:42:04,375 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 281.27 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 93.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -182.6 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 362.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 5640.15 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.0 MB). Peak memory consumption was 83.8 MB. Max. memory is 11.5 GB. * Witness Printer took 4.98 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * 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 5.5s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 4.5s. Construction of modules took 0.1s. Büchi inclusion checks took 0.7s. 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: 19ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...