./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-numeric/gcd01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-numeric/gcd01-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 60bddbffe1e2002d3081296e00d2a4e7e030158e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 16:11:29,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:11:29,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:11:29,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:11:29,935 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:11:29,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:11:29,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:11:29,937 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:11:29,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:11:29,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:11:29,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:11:29,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:11:29,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:11:29,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:11:29,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:11:29,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:11:29,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:11:29,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:11:29,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:11:29,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:11:29,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:11:29,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:11:29,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:11:29,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:11:29,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:11:29,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:11:29,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:11:29,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:11:29,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:11:29,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:11:29,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:11:29,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:11:29,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:11:29,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:11:29,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:11:29,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:11:29,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:11:29,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:11:29,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:11:29,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:11:29,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:11:29,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 16:11:29,968 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:11:29,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:11:29,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:11:29,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:11:29,969 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 16:11:29,969 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 16:11:29,969 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 16:11:29,969 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 16:11:29,969 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 16:11:29,969 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 16:11:29,970 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 16:11:29,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:11:29,970 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 16:11:29,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:11:29,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:11:29,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 16:11:29,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 16:11:29,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 16:11:29,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 16:11:29,971 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 16:11:29,971 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:11:29,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 16:11:29,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:11:29,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 16:11:29,971 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 16:11:29,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:11:29,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 16:11:29,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:11:29,972 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 16:11:29,972 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 16:11:29,972 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60bddbffe1e2002d3081296e00d2a4e7e030158e [2019-12-07 16:11:30,069 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:11:30,077 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:11:30,079 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:11:30,080 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:11:30,081 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:11:30,081 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/../../sv-benchmarks/c/termination-numeric/gcd01-2.c [2019-12-07 16:11:30,118 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/data/398f83592/7519a28c68ce47db9d465e43e211eabe/FLAG04cc3a4c5 [2019-12-07 16:11:30,543 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:11:30,544 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/sv-benchmarks/c/termination-numeric/gcd01-2.c [2019-12-07 16:11:30,549 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/data/398f83592/7519a28c68ce47db9d465e43e211eabe/FLAG04cc3a4c5 [2019-12-07 16:11:30,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/data/398f83592/7519a28c68ce47db9d465e43e211eabe [2019-12-07 16:11:30,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:11:30,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:11:30,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:11:30,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:11:30,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:11:30,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fee84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30, skipping insertion in model container [2019-12-07 16:11:30,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:11:30,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:11:30,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:11:30,688 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:11:30,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:11:30,744 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:11:30,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30 WrapperNode [2019-12-07 16:11:30,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:11:30,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:11:30,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:11:30,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:11:30,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:11:30,766 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:11:30,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:11:30,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:11:30,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... [2019-12-07 16:11:30,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:11:30,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:11:30,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:11:30,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:11:30,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:30,819 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2019-12-07 16:11:30,820 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2019-12-07 16:11:30,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:11:30,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:11:30,923 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:11:30,923 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 16:11:30,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:11:30 BoogieIcfgContainer [2019-12-07 16:11:30,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:11:30,925 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 16:11:30,925 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 16:11:30,927 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 16:11:30,927 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 16:11:30,927 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 04:11:30" (1/3) ... [2019-12-07 16:11:30,928 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1c518765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 04:11:30, skipping insertion in model container [2019-12-07 16:11:30,928 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 16:11:30,928 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:11:30" (2/3) ... [2019-12-07 16:11:30,929 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1c518765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 04:11:30, skipping insertion in model container [2019-12-07 16:11:30,929 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 16:11:30,929 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:11:30" (3/3) ... [2019-12-07 16:11:30,930 INFO L371 chiAutomizerObserver]: Analyzing ICFG gcd01-2.c [2019-12-07 16:11:30,958 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 16:11:30,958 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 16:11:30,958 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 16:11:30,958 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:11:30,959 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:11:30,959 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 16:11:30,959 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:11:30,959 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 16:11:30,968 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-12-07 16:11:30,984 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-12-07 16:11:30,984 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:11:30,984 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:11:30,989 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-12-07 16:11:30,989 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-12-07 16:11:30,989 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 16:11:30,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-12-07 16:11:30,991 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-12-07 16:11:30,991 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:11:30,991 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:11:30,991 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-12-07 16:11:30,991 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-12-07 16:11:30,996 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2; 10#L30true assume !(main_~m~0 <= 0);main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 18#L34true assume !(main_~n~0 <= 0); 4#L37true call main_#t~ret4 := gcd(main_~m~0, main_~n~0);< 5#gcdENTRYtrue [2019-12-07 16:11:30,996 INFO L796 eck$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 [2019-12-07 16:11:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:31,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1513559, now seen corresponding path program 1 times [2019-12-07 16:11:31,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:31,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65479782] [2019-12-07 16:11:31,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,076 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash 28756386, now seen corresponding path program 1 times [2019-12-07 16:11:31,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:31,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563454155] [2019-12-07 16:11:31,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,088 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash -15763700, now seen corresponding path program 1 times [2019-12-07 16:11:31,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:31,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119977796] [2019-12-07 16:11:31,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,107 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:31,189 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:11:31,190 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:11:31,190 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:11:31,190 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:11:31,190 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:11:31,190 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,190 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:11:31,190 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:11:31,190 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration1_Loop [2019-12-07 16:11:31,190 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:11:31,190 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:11:31,204 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,257 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:11:31,258 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,262 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:11:31,262 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:11:31,268 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:11:31,268 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {gcd_#res=0} Honda state: {gcd_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,272 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:11:31,273 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,280 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:11:31,280 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:11:31,297 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:11:31,298 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:11:31,298 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:11:31,298 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:11:31,298 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:11:31,298 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:11:31,299 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,299 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:11:31,299 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:11:31,299 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration1_Loop [2019-12-07 16:11:31,299 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:11:31,299 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:11:31,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,312 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,341 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:11:31,345 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,348 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 [2019-12-07 16:11:31,350 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:11:31,351 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:11:31,351 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:11:31,351 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:11:31,352 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:11:31,353 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:11:31,354 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:11:31,356 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,360 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 [2019-12-07 16:11:31,361 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:11:31,361 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:11:31,361 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:11:31,361 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:11:31,361 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:11:31,362 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:11:31,362 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:11:31,363 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,367 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 [2019-12-07 16:11:31,368 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:11:31,368 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:11:31,368 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:11:31,368 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:11:31,368 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:11:31,370 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:11:31,370 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:11:31,374 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:11:31,377 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-12-07 16:11:31,377 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,380 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:11:31,381 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:11:31,381 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:11:31,381 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_#in~y1) = 1*gcd_#in~y1 Supporting invariants [] [2019-12-07 16:11:31,384 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:11:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:31,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:11:31,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:31,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:11:31,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:31,470 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 [2019-12-07 16:11:31,471 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 5 states. [2019-12-07 16:11:31,601 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. [2019-12-07 16:11:31,602 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 [2019-12-07 16:11:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 16:11:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2019-12-07 16:11:31,605 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 4 letters. Loop has 5 letters. [2019-12-07 16:11:31,606 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:31,606 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 9 letters. Loop has 5 letters. [2019-12-07 16:11:31,607 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:31,607 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 4 letters. Loop has 10 letters. [2019-12-07 16:11:31,607 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:31,608 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 93 states and 129 transitions. [2019-12-07 16:11:31,613 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:11:31,617 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 93 states to 35 states and 40 transitions. [2019-12-07 16:11:31,618 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-12-07 16:11:31,618 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2019-12-07 16:11:31,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 40 transitions. [2019-12-07 16:11:31,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:11:31,619 INFO L688 BuchiCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-12-07 16:11:31,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states and 40 transitions. [2019-12-07 16:11:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 17. [2019-12-07 16:11:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 16:11:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-12-07 16:11:31,638 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-12-07 16:11:31,638 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-12-07 16:11:31,639 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 16:11:31,639 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 20 transitions. [2019-12-07 16:11:31,639 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:11:31,639 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:11:31,639 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:11:31,639 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2019-12-07 16:11:31,640 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-12-07 16:11:31,640 INFO L794 eck$LassoCheckResult]: Stem: 208#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2; 209#L30 assume !(main_~m~0 <= 0);main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 214#L34 assume !(main_~n~0 <= 0); 200#L37 call main_#t~ret4 := gcd(main_~m~0, main_~n~0);< 202#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 205#L16 [2019-12-07 16:11:31,640 INFO L796 eck$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 [2019-12-07 16:11:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:31,640 INFO L82 PathProgramCache]: Analyzing trace with hash 46920329, now seen corresponding path program 1 times [2019-12-07 16:11:31,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:31,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972602016] [2019-12-07 16:11:31,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,647 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash 32576381, now seen corresponding path program 1 times [2019-12-07 16:11:31,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:31,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074017360] [2019-12-07 16:11:31,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,656 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash -488671755, now seen corresponding path program 1 times [2019-12-07 16:11:31,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:31,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836648402] [2019-12-07 16:11:31,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:31,667 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:31,724 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:11:31,725 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:11:31,725 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:11:31,725 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:11:31,725 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:11:31,725 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,725 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:11:31,725 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:11:31,725 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration2_Loop [2019-12-07 16:11:31,725 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:11:31,725 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:11:31,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,737 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:31,809 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:11:31,810 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,812 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:11:31,813 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:31,824 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:11:31,824 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:11:33,018 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:11:33,020 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:11:33,020 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:11:33,020 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:11:33,021 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:11:33,021 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:11:33,021 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,021 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:11:33,021 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:11:33,021 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration2_Loop [2019-12-07 16:11:33,021 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:11:33,021 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:11:33,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,105 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:11:33,105 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,108 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 [2019-12-07 16:11:33,110 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:11:33,110 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:11:33,110 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:11:33,110 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:11:33,110 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:11:33,112 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:11:33,113 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:11:33,116 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:11:33,120 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 16:11:33,120 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,123 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:11:33,123 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:11:33,123 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:11:33,123 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] [2019-12-07 16:11:33,125 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:11:33,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:33,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 16:11:33,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:33,153 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:11:33,154 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:33,173 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 [2019-12-07 16:11:33,173 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 20 transitions. cyclomatic complexity: 5 Second operand 4 states. [2019-12-07 16:11:33,190 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. [2019-12-07 16:11:33,191 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 [2019-12-07 16:11:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 16:11:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-12-07 16:11:33,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 5 letters. Loop has 5 letters. [2019-12-07 16:11:33,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:33,192 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 10 letters. Loop has 5 letters. [2019-12-07 16:11:33,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:33,192 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 5 letters. Loop has 10 letters. [2019-12-07 16:11:33,192 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:33,192 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 60 transitions. [2019-12-07 16:11:33,194 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:11:33,195 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 32 states and 36 transitions. [2019-12-07 16:11:33,195 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2019-12-07 16:11:33,195 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-12-07 16:11:33,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 36 transitions. [2019-12-07 16:11:33,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 16:11:33,195 INFO L688 BuchiCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-12-07 16:11:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states and 36 transitions. [2019-12-07 16:11:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2019-12-07 16:11:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 16:11:33,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-12-07 16:11:33,197 INFO L711 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-12-07 16:11:33,197 INFO L591 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-12-07 16:11:33,198 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 16:11:33,198 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 27 transitions. [2019-12-07 16:11:33,198 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-12-07 16:11:33,198 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 16:11:33,198 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 16:11:33,199 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 16:11:33,199 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2019-12-07 16:11:33,199 INFO L794 eck$LassoCheckResult]: Stem: 335#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4, main_~m~0, main_~n~0, main_~z~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2; 336#L30 assume !(main_~m~0 <= 0);main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 344#L34 assume !(main_~n~0 <= 0); 331#L37 call main_#t~ret4 := gcd(main_~m~0, main_~n~0);< 332#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 333#L16 assume !(~y1 <= 0 || ~y2 <= 0); 349#L19 assume !(~y1 == ~y2); 348#L22 assume ~y1 > ~y2; 327#L23 call #t~ret0 := gcd(~y1 - ~y2, ~y2);< 329#gcdENTRY ~y1 := #in~y1;~y2 := #in~y2; 345#L16 [2019-12-07 16:11:33,199 INFO L796 eck$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 [2019-12-07 16:11:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash -488674700, now seen corresponding path program 2 times [2019-12-07 16:11:33,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:33,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846676791] [2019-12-07 16:11:33,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:33,210 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash 32576381, now seen corresponding path program 2 times [2019-12-07 16:11:33,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:33,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355890668] [2019-12-07 16:11:33,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:33,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:33,217 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1201587990, now seen corresponding path program 1 times [2019-12-07 16:11:33,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 16:11:33,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753604375] [2019-12-07 16:11:33,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:11:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:11:33,234 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 16:11:33,281 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:11:33,281 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:11:33,281 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:11:33,281 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:11:33,281 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 16:11:33,281 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,282 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:11:33,282 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:11:33,282 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration3_Loop [2019-12-07 16:11:33,282 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:11:33,282 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:11:33,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,351 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:11:33,352 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,354 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:11:33,355 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:11:33,357 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 16:11:33,357 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 /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,362 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 16:11:33,362 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,373 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 16:11:33,373 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 16:11:33,879 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 16:11:33,881 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 16:11:33,881 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 16:11:33,881 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 16:11:33,882 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 16:11:33,882 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 16:11:33,882 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,882 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 16:11:33,882 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 16:11:33,882 INFO L133 ssoRankerPreferences]: Filename of dumped script: gcd01-2.c_Iteration3_Loop [2019-12-07 16:11:33,882 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 16:11:33,882 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 16:11:33,883 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 16:11:33,936 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 16:11:33,936 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,939 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 [2019-12-07 16:11:33,940 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:11:33,940 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:11:33,940 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:11:33,940 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:11:33,940 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:11:33,941 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:11:33,941 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:11:33,942 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,947 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 [2019-12-07 16:11:33,948 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 16:11:33,948 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 16:11:33,948 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 16:11:33,949 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 16:11:33,949 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 16:11:33,950 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 16:11:33,950 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 16:11:33,953 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 16:11:33,956 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 16:11:33,956 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b6589181-9190-4de4-810b-7d6ab91f1f39/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 16:11:33,958 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 16:11:33,958 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 16:11:33,959 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 16:11:33,959 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(gcd_~y2) = 1*gcd_~y2 Supporting invariants [] [2019-12-07 16:11:33,960 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 16:11:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:33,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:11:33,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:33,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:11:33,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:34,006 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 [2019-12-07 16:11:34,006 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-12-07 16:11:34,022 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. [2019-12-07 16:11:34,022 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 [2019-12-07 16:11:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 16:11:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-12-07 16:11:34,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 10 letters. Loop has 5 letters. [2019-12-07 16:11:34,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:34,023 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 16:11:34,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:34,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:11:34,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:34,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:11:34,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:34,063 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 [2019-12-07 16:11:34,063 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-12-07 16:11:34,076 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. [2019-12-07 16:11:34,077 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 [2019-12-07 16:11:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 16:11:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-12-07 16:11:34,077 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 10 letters. Loop has 5 letters. [2019-12-07 16:11:34,077 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:34,077 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 16:11:34,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:11:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:34,093 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:11:34,094 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:11:34,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 16:11:34,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:11:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:11:34,118 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 [2019-12-07 16:11:34,118 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-12-07 16:11:34,135 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. [2019-12-07 16:11:34,135 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 [2019-12-07 16:11:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 16:11:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2019-12-07 16:11:34,136 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 10 letters. Loop has 5 letters. [2019-12-07 16:11:34,136 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:34,136 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 15 letters. Loop has 5 letters. [2019-12-07 16:11:34,136 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:34,137 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 10 letters. Loop has 10 letters. [2019-12-07 16:11:34,137 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 16:11:34,137 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 74 states and 85 transitions. [2019-12-07 16:11:34,139 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 16:11:34,139 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 74 states to 0 states and 0 transitions. [2019-12-07 16:11:34,139 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 16:11:34,139 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 16:11:34,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 16:11:34,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 16:11:34,139 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:11:34,139 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:11:34,139 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 16:11:34,139 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 16:11:34,139 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-12-07 16:11:34,139 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 16:11:34,140 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-12-07 16:11:34,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 04:11:34 BoogieIcfgContainer [2019-12-07 16:11:34,144 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 16:11:34,144 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:11:34,144 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:11:34,144 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:11:34,145 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:11:30" (3/4) ... [2019-12-07 16:11:34,147 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 16:11:34,147 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:11:34,148 INFO L168 Benchmark]: Toolchain (without parser) took 3585.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 946.2 MB in the beginning and 998.8 MB in the end (delta: -52.6 MB). Peak memory consumption was 43.8 MB. Max. memory is 11.5 GB. [2019-12-07 16:11:34,149 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:11:34,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -147.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-12-07 16:11:34,149 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.56 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:11:34,150 INFO L168 Benchmark]: Boogie Preprocessor took 10.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:11:34,150 INFO L168 Benchmark]: RCFGBuilder took 148.08 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-12-07 16:11:34,150 INFO L168 Benchmark]: BuchiAutomizer took 3219.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 998.8 MB in the end (delta: 76.0 MB). Peak memory consumption was 76.0 MB. Max. memory is 11.5 GB. [2019-12-07 16:11:34,151 INFO L168 Benchmark]: Witness Printer took 2.79 ms. Allocated memory is still 1.1 GB. Free memory is still 998.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:11:34,152 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 181.88 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 96.5 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -147.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.56 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 148.08 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3219.30 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 998.8 MB in the end (delta: 76.0 MB). Peak memory consumption was 76.0 MB. Max. memory is 11.5 GB. * Witness Printer took 2.79 ms. Allocated memory is still 1.1 GB. Free memory is still 998.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 3 terminating modules (0 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(y1) and consists of 7 locations. One deterministic module has affine ranking function y2 and consists of 4 locations. One nondeterministic module has affine ranking function y2 and consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.1s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 2.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. 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, 0.0s 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: 10ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...