./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive/gcd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c 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/recursive/gcd01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash 0497b69437c9ebb889888bdb31aaefcc8eaad029 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 21:15:56,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 21:15:56,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 21:15:56,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 21:15:56,627 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 21:15:56,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 21:15:56,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 21:15:56,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 21:15:56,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 21:15:56,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 21:15:56,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 21:15:56,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 21:15:56,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 21:15:56,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 21:15:56,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 21:15:56,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 21:15:56,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 21:15:56,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 21:15:56,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 21:15:56,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 21:15:56,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 21:15:56,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 21:15:56,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 21:15:56,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 21:15:56,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 21:15:56,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 21:15:56,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 21:15:56,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 21:15:56,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 21:15:56,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 21:15:56,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 21:15:56,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 21:15:56,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 21:15:56,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 21:15:56,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 21:15:56,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 21:15:56,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 21:15:56,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 21:15:56,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 21:15:56,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 21:15:56,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 21:15:56,681 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 21:15:56,712 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 21:15:56,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 21:15:56,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 21:15:56,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 21:15:56,715 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 21:15:56,715 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 21:15:56,716 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 21:15:56,716 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 21:15:56,716 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 21:15:56,717 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 21:15:56,718 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 21:15:56,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 21:15:56,718 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 21:15:56,719 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 21:15:56,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 21:15:56,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 21:15:56,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 21:15:56,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 21:15:56,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 21:15:56,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 21:15:56,721 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 21:15:56,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 21:15:56,721 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 21:15:56,721 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 21:15:56,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 21:15:56,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 21:15:56,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 21:15:56,723 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 21:15:56,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 21:15:56,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 21:15:56,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 21:15:56,725 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 21:15:56,726 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 21:15:56,726 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0497b69437c9ebb889888bdb31aaefcc8eaad029 [2019-11-28 21:15:57,016 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 21:15:57,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 21:15:57,042 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 21:15:57,044 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 21:15:57,044 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 21:15:57,045 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd01-1.c [2019-11-28 21:15:57,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfb8fb14d/c8d08409a2bc485996746179d9106227/FLAGca0965ea5 [2019-11-28 21:15:57,547 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 21:15:57,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd01-1.c [2019-11-28 21:15:57,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfb8fb14d/c8d08409a2bc485996746179d9106227/FLAGca0965ea5 [2019-11-28 21:15:57,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfb8fb14d/c8d08409a2bc485996746179d9106227 [2019-11-28 21:15:57,924 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 21:15:57,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 21:15:57,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 21:15:57,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 21:15:57,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 21:15:57,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:15:57" (1/1) ... [2019-11-28 21:15:57,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1035cb71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:57, skipping insertion in model container [2019-11-28 21:15:57,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:15:57" (1/1) ... [2019-11-28 21:15:57,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 21:15:57,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 21:15:58,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:15:58,122 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 21:15:58,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:15:58,153 INFO L208 MainTranslator]: Completed translation [2019-11-28 21:15:58,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58 WrapperNode [2019-11-28 21:15:58,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 21:15:58,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 21:15:58,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 21:15:58,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 21:15:58,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (1/1) ... [2019-11-28 21:15:58,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (1/1) ... [2019-11-28 21:15:58,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 21:15:58,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 21:15:58,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 21:15:58,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 21:15:58,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (1/1) ... [2019-11-28 21:15:58,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (1/1) ... [2019-11-28 21:15:58,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (1/1) ... [2019-11-28 21:15:58,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (1/1) ... [2019-11-28 21:15:58,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (1/1) ... [2019-11-28 21:15:58,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (1/1) ... [2019-11-28 21:15:58,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (1/1) ... [2019-11-28 21:15:58,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 21:15:58,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 21:15:58,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 21:15:58,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 21:15:58,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (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 [2019-11-28 21:15:58,325 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2019-11-28 21:15:58,325 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2019-11-28 21:15:58,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 21:15:58,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 21:15:58,486 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 21:15:58,487 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 21:15:58,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:15:58 BoogieIcfgContainer [2019-11-28 21:15:58,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 21:15:58,488 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 21:15:58,488 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 21:15:58,491 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 21:15:58,492 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:15:58,492 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 09:15:57" (1/3) ... [2019-11-28 21:15:58,493 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@75b6286e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:15:58, skipping insertion in model container [2019-11-28 21:15:58,493 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:15:58,493 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:15:58" (2/3) ... [2019-11-28 21:15:58,494 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@75b6286e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:15:58, skipping insertion in model container [2019-11-28 21:15:58,494 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:15:58,494 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:15:58" (3/3) ... [2019-11-28 21:15:58,495 INFO L371 chiAutomizerObserver]: Analyzing ICFG gcd01-1.c [2019-11-28 21:15:58,541 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 21:15:58,541 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 21:15:58,541 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 21:15:58,541 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 21:15:58,542 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 21:15:58,542 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 21:15:58,542 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 21:15:58,542 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 21:15:58,556 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-11-28 21:15:58,580 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-28 21:15:58,580 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:15:58,580 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:15:58,588 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-28 21:15:58,588 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-11-28 21:15:58,588 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 21:15:58,589 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-11-28 21:15:58,591 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-28 21:15:58,591 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:15:58,591 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:15:58,592 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-28 21:15:58,592 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-11-28 21:15:58,598 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2; 10#L30true assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 18#L34true assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 4#L37true call main_#t~ret4 := gcd(main_~m~0, main_~n~0);< 5#gcdENTRYtrue [2019-11-28 21:15:58,598 INFO L796 eck$LassoCheckResult]: Loop: 5#gcdENTRYtrue ~y1 := #in~y1;~y2 := #in~y2; 21#L16true assume !(~y1 <= 0 || ~y2 <= 0); 15#L19true assume !(~y1 == ~y2); 12#L22true assume ~y1 > ~y2; 3#L23true call #t~ret0 := gcd(~y1 - ~y2, ~y2);< 5#gcdENTRYtrue [2019-11-28 21:15:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:15:58,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1513559, now seen corresponding path program 1 times [2019-11-28 21:15:58,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:15:58,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643574833] [2019-11-28 21:15:58,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:15:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:58,697 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:15:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:15:58,699 INFO L82 PathProgramCache]: Analyzing trace with hash 28756386, now seen corresponding path program 1 times [2019-11-28 21:15:58,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:15:58,699 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018629158] [2019-11-28 21:15:58,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:15:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:58,716 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:15:58,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:15:58,719 INFO L82 PathProgramCache]: Analyzing trace with hash -15763700, now seen corresponding path program 1 times [2019-11-28 21:15:58,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:15:58,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724120789] [2019-11-28 21:15:58,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:15:58,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:58,747 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:15:58,881 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2019-11-28 21:15:58,976 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:15:58,977 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:15:58,977 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:15:58,978 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:15:58,978 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:15:58,978 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:15:58,978 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:15:58,979 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:15:58,979 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration1_Loop [2019-11-28 21:15:58,979 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:15:58,979 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:15:58,999 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,007 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,032 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,037 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,109 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:15:59,110 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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:15:59,117 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:15:59,117 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:15:59,125 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:15:59,125 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 [2019-11-28 21:15:59,135 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:15:59,136 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) [2019-11-28 21:15:59,157 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:15:59,158 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:15:59,185 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:15:59,187 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:15:59,188 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:15:59,188 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:15:59,188 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:15:59,188 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:15:59,188 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:15:59,189 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:15:59,189 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:15:59,189 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration1_Loop [2019-11-28 21:15:59,189 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:15:59,190 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:15:59,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:15:59,262 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:15:59,267 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) [2019-11-28 21:15:59,286 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 [2019-11-28 21:15:59,288 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:15:59,289 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:15:59,289 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:15:59,290 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:15:59,290 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:15:59,292 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:15:59,293 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 [2019-11-28 21:15:59,297 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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:15:59,306 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 [2019-11-28 21:15:59,308 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:15:59,308 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:15:59,308 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:15:59,308 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:15:59,309 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:15:59,310 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:15:59,310 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:15:59,312 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) [2019-11-28 21:15:59,329 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 [2019-11-28 21:15:59,331 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:15:59,331 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:15:59,332 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:15:59,332 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:15:59,332 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:15:59,336 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:15:59,336 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 [2019-11-28 21:15:59,345 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:15:59,352 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 21:15:59,352 INFO L444 ModelExtractionUtils]: 2 out of 4 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 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 [2019-11-28 21:15:59,364 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:15:59,365 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:15:59,365 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:15:59,366 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_#in~y1) = 1*gcd_#in~y1 Supporting invariants [] [2019-11-28 21:15:59,374 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:15:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:15:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:15:59,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 21:15:59,467 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:15:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:15:59,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 21:15:59,494 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:15:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:15:59,560 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 [2019-11-28 21:15:59,562 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 5 states. [2019-11-28 21:15:59,767 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states.. Second operand 5 states. Result 93 states and 129 transitions. Complement of second has 30 states. [2019-11-28 21:15:59,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2019-11-28 21:15:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:15:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2019-11-28 21:15:59,775 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 4 letters. Loop has 5 letters. [2019-11-28 21:15:59,778 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:15:59,778 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 9 letters. Loop has 5 letters. [2019-11-28 21:15:59,779 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:15:59,779 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 4 letters. Loop has 10 letters. [2019-11-28 21:15:59,779 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:15:59,780 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 93 states and 129 transitions. [2019-11-28 21:15:59,804 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:15:59,815 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 93 states to 35 states and 40 transitions. [2019-11-28 21:15:59,817 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 21:15:59,818 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2019-11-28 21:15:59,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 40 transitions. [2019-11-28 21:15:59,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:15:59,820 INFO L688 BuchiCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-11-28 21:15:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states and 40 transitions. [2019-11-28 21:15:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 17. [2019-11-28 21:15:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 21:15:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-28 21:15:59,857 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-28 21:15:59,857 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-28 21:15:59,858 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 21:15:59,858 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 20 transitions. [2019-11-28 21:15:59,860 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:15:59,860 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:15:59,860 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:15:59,861 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2019-11-28 21:15:59,861 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-11-28 21:15:59,862 INFO L794 eck$LassoCheckResult]: Stem: 208#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2; 209#L30 assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 214#L34 assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 200#L37 call main_#t~ret4 := gcd(main_~m~0, main_~n~0);< 202#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 205#L16 [2019-11-28 21:15:59,862 INFO L796 eck$LassoCheckResult]: Loop: 205#L16 assume !(~y1 <= 0 || ~y2 <= 0); 210#L19 assume !(~y1 == ~y2); 211#L22 assume !(~y1 > ~y2); 204#L25 call #t~ret1 := gcd(~y1, ~y2 - ~y1);< 203#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 205#L16 [2019-11-28 21:15:59,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:15:59,863 INFO L82 PathProgramCache]: Analyzing trace with hash 46920329, now seen corresponding path program 1 times [2019-11-28 21:15:59,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:15:59,864 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447673474] [2019-11-28 21:15:59,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:15:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:59,900 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:15:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:15:59,903 INFO L82 PathProgramCache]: Analyzing trace with hash 32576381, now seen corresponding path program 1 times [2019-11-28 21:15:59,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:15:59,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553648854] [2019-11-28 21:15:59,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:15:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:59,932 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:15:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:15:59,937 INFO L82 PathProgramCache]: Analyzing trace with hash -488671755, now seen corresponding path program 1 times [2019-11-28 21:15:59,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:15:59,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122890593] [2019-11-28 21:15:59,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:15:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:15:59,977 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:00,085 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:00,086 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:00,086 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:00,086 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:00,086 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:00,086 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:00,086 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:00,087 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:00,087 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration2_Loop [2019-11-28 21:16:00,087 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:00,087 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:00,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:00,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:00,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:00,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:00,234 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:00,234 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) [2019-11-28 21:16:00,243 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:00,243 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) [2019-11-28 21:16:00,278 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:00,278 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 [2019-11-28 21:16:01,619 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:01,625 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:01,626 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:01,626 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:01,626 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:01,626 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:01,626 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:01,626 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:01,627 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:01,627 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration2_Loop [2019-11-28 21:16:01,627 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:01,627 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:01,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:01,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:01,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:01,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:01,768 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:01,768 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) [2019-11-28 21:16:01,775 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 [2019-11-28 21:16:01,776 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:01,777 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:01,777 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:01,777 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:01,777 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:01,780 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:01,780 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:01,785 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:01,791 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:01,791 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) [2019-11-28 21:16:01,798 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:01,799 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:01,799 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:01,799 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 [2019-11-28 21:16:01,805 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:01,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 21:16:01,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:01,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 21:16:01,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:01,921 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 [2019-11-28 21:16:01,921 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 20 transitions. cyclomatic complexity: 5 Second operand 4 states. [2019-11-28 21:16:01,956 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 20 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 53 states and 60 transitions. Complement of second has 11 states. [2019-11-28 21:16:01,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 21:16:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-28 21:16:01,961 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 5 letters. Loop has 5 letters. [2019-11-28 21:16:01,962 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:01,962 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 10 letters. Loop has 5 letters. [2019-11-28 21:16:01,962 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:01,962 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 5 letters. Loop has 10 letters. [2019-11-28 21:16:01,963 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:01,963 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 60 transitions. [2019-11-28 21:16:01,965 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:01,966 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 32 states and 36 transitions. [2019-11-28 21:16:01,966 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2019-11-28 21:16:01,966 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-11-28 21:16:01,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 36 transitions. [2019-11-28 21:16:01,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:01,967 INFO L688 BuchiCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-28 21:16:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states and 36 transitions. [2019-11-28 21:16:01,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2019-11-28 21:16:01,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 21:16:01,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-28 21:16:01,970 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-28 21:16:01,971 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-28 21:16:01,971 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 21:16:01,971 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 27 transitions. [2019-11-28 21:16:01,971 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:01,972 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:01,972 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:01,972 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:01,972 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-11-28 21:16:01,973 INFO L794 eck$LassoCheckResult]: Stem: 335#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2; 336#L30 assume !(main_~m~0 <= 0 || main_~m~0 > 2147483647);main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 344#L34 assume !(main_~n~0 <= 0 || main_~n~0 > 2147483647); 331#L37 call main_#t~ret4 := gcd(main_~m~0, main_~n~0);< 332#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 333#L16 assume !(~y1 <= 0 || ~y2 <= 0); 349#L19 assume !(~y1 == ~y2); 348#L22 assume ~y1 > ~y2; 327#L23 call #t~ret0 := gcd(~y1 - ~y2, ~y2);< 329#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 345#L16 [2019-11-28 21:16:01,973 INFO L796 eck$LassoCheckResult]: Loop: 345#L16 assume !(~y1 <= 0 || ~y2 <= 0); 337#L19 assume !(~y1 == ~y2); 339#L22 assume !(~y1 > ~y2); 338#L25 call #t~ret1 := gcd(~y1, ~y2 - ~y1);< 342#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 345#L16 [2019-11-28 21:16:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash -488674700, now seen corresponding path program 2 times [2019-11-28 21:16:01,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:01,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151842861] [2019-11-28 21:16:01,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:01,991 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash 32576381, now seen corresponding path program 2 times [2019-11-28 21:16:01,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:01,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442723900] [2019-11-28 21:16:01,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:02,002 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:02,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1201587990, now seen corresponding path program 1 times [2019-11-28 21:16:02,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:02,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125556820] [2019-11-28 21:16:02,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:02,026 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:02,100 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:02,100 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:02,100 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:02,100 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:02,100 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:02,101 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:02,101 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:02,101 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:02,101 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration3_Loop [2019-11-28 21:16:02,101 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:02,101 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:02,103 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:02,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:02,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:02,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:02,216 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:02,216 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) [2019-11-28 21:16:02,236 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:02,236 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:02,241 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:02,241 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#t~ret0=0} Honda state: {gcd_#t~ret0=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 [2019-11-28 21:16:02,251 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:02,252 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 [2019-11-28 21:16:02,270 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:02,270 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:02,773 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:02,776 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:02,776 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:02,776 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:02,776 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:02,776 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:02,776 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:02,776 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:02,776 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:02,777 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-1.c_Iteration3_Loop [2019-11-28 21:16:02,777 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:02,777 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:02,778 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:02,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:02,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:02,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:02,877 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:02,877 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) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:02,904 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 [2019-11-28 21:16:02,906 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:02,906 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:02,906 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:02,907 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:02,907 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:02,908 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:02,908 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:02,916 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 [2019-11-28 21:16:02,928 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 [2019-11-28 21:16:02,930 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:02,930 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:02,930 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:02,930 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:02,930 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:02,937 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:02,937 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:02,943 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:02,947 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:02,947 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 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 [2019-11-28 21:16:02,955 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:02,955 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:02,955 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:02,955 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:02,958 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:02,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:03,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:03,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:03,023 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 21:16:03,024 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:03,047 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 [2019-11-28 21:16:03,047 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-11-28 21:16:03,077 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 45 states and 50 transitions. Complement of second has 11 states. [2019-11-28 21:16:03,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 21:16:03,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-28 21:16:03,081 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 10 letters. Loop has 5 letters. [2019-11-28 21:16:03,081 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:03,081 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:03,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:03,117 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:03,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:03,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 21:16:03,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:03,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:03,156 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 [2019-11-28 21:16:03,157 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-11-28 21:16:03,180 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 45 states and 50 transitions. Complement of second has 11 states. [2019-11-28 21:16:03,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 21:16:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-28 21:16:03,181 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 10 letters. Loop has 5 letters. [2019-11-28 21:16:03,182 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:03,182 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:03,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:03,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:03,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 21:16:03,219 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:03,248 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 [2019-11-28 21:16:03,248 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-11-28 21:16:03,279 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 74 states and 85 transitions. Complement of second has 12 states. [2019-11-28 21:16:03,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:03,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 21:16:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2019-11-28 21:16:03,283 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 10 letters. Loop has 5 letters. [2019-11-28 21:16:03,284 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:03,284 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 15 letters. Loop has 5 letters. [2019-11-28 21:16:03,284 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:03,284 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 10 letters. Loop has 10 letters. [2019-11-28 21:16:03,285 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:03,285 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 85 transitions. [2019-11-28 21:16:03,287 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:16:03,287 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 0 states and 0 transitions. [2019-11-28 21:16:03,287 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 21:16:03,288 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 21:16:03,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 21:16:03,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 21:16:03,291 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:03,291 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:03,291 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:03,291 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 21:16:03,291 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 21:16:03,291 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:16:03,291 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 21:16:03,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 09:16:03 BoogieIcfgContainer [2019-11-28 21:16:03,301 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 21:16:03,303 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 21:16:03,303 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 21:16:03,303 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 21:16:03,304 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:15:58" (3/4) ... [2019-11-28 21:16:03,308 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 21:16:03,308 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 21:16:03,311 INFO L168 Benchmark]: Toolchain (without parser) took 5383.67 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.8 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -173.0 MB). Peak memory consumption was 37.8 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:03,312 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:03,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.18 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:03,318 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.39 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:03,319 INFO L168 Benchmark]: Boogie Preprocessor took 72.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -188.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:03,320 INFO L168 Benchmark]: RCFGBuilder took 231.22 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: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:03,321 INFO L168 Benchmark]: BuchiAutomizer took 4813.09 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -6.2 MB). Peak memory consumption was 59.3 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:03,321 INFO L168 Benchmark]: Witness Printer took 4.77 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: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2019-11-28 21:16:03,336 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 227.18 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 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 29.39 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 72.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -188.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 231.22 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: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4813.09 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -6.2 MB). Peak memory consumption was 59.3 MB. Max. memory is 11.5 GB. * Witness Printer took 4.77 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: 24 B). Peak memory consumption was 24 B. 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 4.7s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 3.7s. 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 24 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 47 SDtfs, 78 SDslu, 8 SDs, 0 SdLazy, 115 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital25 mio100 ax100 hnf91 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq177 hnf91 smp89 dnf100 smp100 tf106 neg98 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 28ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...