./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9918b49e0d76e4ce36b6a6760021b33460a8ae9b ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 09:18:59,101 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 09:18:59,102 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 09:18:59,108 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 09:18:59,108 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 09:18:59,109 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 09:18:59,110 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 09:18:59,110 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 09:18:59,111 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 09:18:59,112 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 09:18:59,112 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 09:18:59,112 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 09:18:59,113 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 09:18:59,113 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 09:18:59,114 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 09:18:59,114 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 09:18:59,114 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 09:18:59,115 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 09:18:59,116 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 09:18:59,117 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 09:18:59,117 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 09:18:59,118 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 09:18:59,119 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 09:18:59,119 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 09:18:59,119 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 09:18:59,120 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 09:18:59,120 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 09:18:59,120 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 09:18:59,121 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 09:18:59,121 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 09:18:59,121 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 09:18:59,122 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 09:18:59,122 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 09:18:59,122 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 09:18:59,122 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 09:18:59,123 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 09:18:59,123 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-12-09 09:18:59,130 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 09:18:59,131 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 09:18:59,131 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 09:18:59,131 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 09:18:59,131 INFO L133 SettingsManager]: * Use SBE=true [2018-12-09 09:18:59,132 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-09 09:18:59,132 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-09 09:18:59,132 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-09 09:18:59,132 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-09 09:18:59,132 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-09 09:18:59,132 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-09 09:18:59,132 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 09:18:59,132 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 09:18:59,132 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 09:18:59,132 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 09:18:59,132 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-09 09:18:59,133 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 09:18:59,133 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-09 09:18:59,134 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 09:18:59,134 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-09 09:18:59,134 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-09 09:18:59,134 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-09 09:18:59,134 INFO L133 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/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9918b49e0d76e4ce36b6a6760021b33460a8ae9b [2018-12-09 09:18:59,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 09:18:59,158 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 09:18:59,160 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 09:18:59,160 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 09:18:59,161 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 09:18:59,161 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-12-09 09:18:59,197 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/data/8bdc31fcf/7172f4b89c1c4fe4bb44f5aa2694e08f/FLAG688056bba [2018-12-09 09:18:59,472 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 09:18:59,473 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-12-09 09:18:59,476 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/data/8bdc31fcf/7172f4b89c1c4fe4bb44f5aa2694e08f/FLAG688056bba [2018-12-09 09:18:59,484 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/data/8bdc31fcf/7172f4b89c1c4fe4bb44f5aa2694e08f [2018-12-09 09:18:59,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 09:18:59,487 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 09:18:59,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 09:18:59,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 09:18:59,490 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 09:18:59,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20cefcf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59, skipping insertion in model container [2018-12-09 09:18:59,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 09:18:59,506 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 09:18:59,590 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:18:59,593 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 09:18:59,603 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 09:18:59,611 INFO L195 MainTranslator]: Completed translation [2018-12-09 09:18:59,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59 WrapperNode [2018-12-09 09:18:59,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 09:18:59,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 09:18:59,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 09:18:59,612 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 09:18:59,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,630 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 09:18:59,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 09:18:59,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 09:18:59,631 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 09:18:59,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,642 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... [2018-12-09 09:18:59,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 09:18:59,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 09:18:59,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 09:18:59,643 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 09:18:59,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:18:59,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 09:18:59,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 09:18:59,799 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 09:18:59,799 INFO L280 CfgBuilder]: Removed 13 assue(true) statements. [2018-12-09 09:18:59,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:18:59 BoogieIcfgContainer [2018-12-09 09:18:59,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 09:18:59,800 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-09 09:18:59,800 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-09 09:18:59,802 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-09 09:18:59,802 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-09 09:18:59,803 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 09.12 09:18:59" (1/3) ... [2018-12-09 09:18:59,803 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3fc480bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.12 09:18:59, skipping insertion in model container [2018-12-09 09:18:59,803 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-09 09:18:59,803 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:18:59" (2/3) ... [2018-12-09 09:18:59,804 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3fc480bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.12 09:18:59, skipping insertion in model container [2018-12-09 09:18:59,804 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-09 09:18:59,804 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:18:59" (3/3) ... [2018-12-09 09:18:59,805 INFO L375 chiAutomizerObserver]: Analyzing ICFG gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-12-09 09:18:59,838 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 09:18:59,838 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-09 09:18:59,838 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-09 09:18:59,838 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-09 09:18:59,839 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 09:18:59,839 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 09:18:59,839 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-09 09:18:59,839 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 09:18:59,839 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-09 09:18:59,847 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-12-09 09:18:59,859 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:18:59,859 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 09:18:59,859 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 09:18:59,863 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-12-09 09:18:59,863 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-09 09:18:59,863 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-09 09:18:59,863 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-12-09 09:18:59,864 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:18:59,864 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 09:18:59,864 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 09:18:59,864 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-12-09 09:18:59,865 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-09 09:18:59,869 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 15#L12true assume !(gcd_test_~a < 0); 12#L12-2true assume !(gcd_test_~b < 0); 16#L13-1true assume !(0 == gcd_test_~a); 8#L20-2true [2018-12-09 09:18:59,869 INFO L796 eck$LassoCheckResult]: Loop: 8#L20-2true assume !!(0 != gcd_test_~b); 10#L20true assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 8#L20-2true [2018-12-09 09:18:59,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:18:59,872 INFO L82 PathProgramCache]: Analyzing trace with hash 959468, now seen corresponding path program 1 times [2018-12-09 09:18:59,874 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:18:59,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:18:59,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:18:59,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:18:59,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:18:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:18:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:18:59,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:18:59,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 1 times [2018-12-09 09:18:59,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:18:59,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:18:59,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:18:59,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:18:59,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:18:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:18:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:18:59,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:18:59,939 INFO L82 PathProgramCache]: Analyzing trace with hash 922049617, now seen corresponding path program 1 times [2018-12-09 09:18:59,939 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:18:59,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:18:59,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:18:59,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:18:59,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:18:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:18:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:18:59,979 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 09:18:59,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-09 09:19:00,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 09:19:00,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 09:19:00,014 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2018-12-09 09:19:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:19:00,035 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2018-12-09 09:19:00,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 09:19:00,037 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 23 transitions. [2018-12-09 09:19:00,038 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:00,040 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 8 states and 9 transitions. [2018-12-09 09:19:00,041 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2018-12-09 09:19:00,041 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2018-12-09 09:19:00,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2018-12-09 09:19:00,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-09 09:19:00,041 INFO L705 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-12-09 09:19:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2018-12-09 09:19:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-09 09:19:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-09 09:19:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-12-09 09:19:00,058 INFO L728 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-12-09 09:19:00,058 INFO L608 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-12-09 09:19:00,058 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-09 09:19:00,058 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2018-12-09 09:19:00,059 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:00,059 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 09:19:00,059 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 09:19:00,059 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2018-12-09 09:19:00,059 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-09 09:19:00,059 INFO L794 eck$LassoCheckResult]: Stem: 55#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 56#L12 assume !(gcd_test_~a < 0); 53#L12-2 assume !(gcd_test_~b < 0); 54#L13-1 assume !(0 == gcd_test_~a); 57#L20-2 assume !!(0 != gcd_test_~b); 60#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 58#L20-2 [2018-12-09 09:19:00,059 INFO L796 eck$LassoCheckResult]: Loop: 58#L20-2 assume !!(0 != gcd_test_~b); 59#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 58#L20-2 [2018-12-09 09:19:00,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,059 INFO L82 PathProgramCache]: Analyzing trace with hash 922049615, now seen corresponding path program 1 times [2018-12-09 09:19:00,059 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:00,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:00,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:19:00,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 2 times [2018-12-09 09:19:00,066 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:00,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:00,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:19:00,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1326417908, now seen corresponding path program 1 times [2018-12-09 09:19:00,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:00,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:00,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:00,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:19:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:00,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:19:00,098 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:19:00,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:19:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:19:00,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:19:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:00,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 09:19:00,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-12-09 09:19:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 09:19:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-09 09:19:00,178 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 6 states. [2018-12-09 09:19:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:19:00,195 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-12-09 09:19:00,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 09:19:00,196 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2018-12-09 09:19:00,197 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:00,197 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2018-12-09 09:19:00,197 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2018-12-09 09:19:00,197 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2018-12-09 09:19:00,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2018-12-09 09:19:00,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-09 09:19:00,197 INFO L705 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-12-09 09:19:00,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2018-12-09 09:19:00,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-12-09 09:19:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-09 09:19:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-12-09 09:19:00,199 INFO L728 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-12-09 09:19:00,199 INFO L608 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-12-09 09:19:00,199 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-09 09:19:00,199 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2018-12-09 09:19:00,199 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:00,199 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 09:19:00,199 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 09:19:00,200 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2018-12-09 09:19:00,200 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-09 09:19:00,200 INFO L794 eck$LassoCheckResult]: Stem: 105#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 106#L12 assume !(gcd_test_~a < 0); 103#L12-2 assume !(gcd_test_~b < 0); 104#L13-1 assume !(0 == gcd_test_~a); 107#L20-2 assume !!(0 != gcd_test_~b); 110#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 108#L20-2 assume !!(0 != gcd_test_~b); 109#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 112#L20-2 [2018-12-09 09:19:00,200 INFO L796 eck$LassoCheckResult]: Loop: 112#L20-2 assume !!(0 != gcd_test_~b); 111#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 112#L20-2 [2018-12-09 09:19:00,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1326417906, now seen corresponding path program 2 times [2018-12-09 09:19:00,200 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:00,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:00,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:19:00,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 3 times [2018-12-09 09:19:00,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:00,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:00,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:00,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash -917678377, now seen corresponding path program 2 times [2018-12-09 09:19:00,214 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:00,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:00,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:00,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:19:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:00,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:19:00,244 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:19:00,249 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 09:19:00,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 09:19:00,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:19:00,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:19:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:00,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 09:19:00,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-12-09 09:19:00,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-09 09:19:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-12-09 09:19:00,304 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 8 states. [2018-12-09 09:19:00,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:19:00,317 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-12-09 09:19:00,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 09:19:00,318 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2018-12-09 09:19:00,318 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:00,318 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2018-12-09 09:19:00,318 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-12-09 09:19:00,318 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-12-09 09:19:00,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2018-12-09 09:19:00,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-09 09:19:00,319 INFO L705 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-12-09 09:19:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2018-12-09 09:19:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-09 09:19:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-09 09:19:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-12-09 09:19:00,320 INFO L728 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-12-09 09:19:00,320 INFO L608 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-12-09 09:19:00,320 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-09 09:19:00,320 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2018-12-09 09:19:00,320 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:00,320 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 09:19:00,320 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 09:19:00,321 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1] [2018-12-09 09:19:00,321 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-09 09:19:00,321 INFO L794 eck$LassoCheckResult]: Stem: 167#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 168#L12 assume !(gcd_test_~a < 0); 165#L12-2 assume !(gcd_test_~b < 0); 166#L13-1 assume !(0 == gcd_test_~a); 169#L20-2 assume !!(0 != gcd_test_~b); 172#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 170#L20-2 assume !!(0 != gcd_test_~b); 171#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 176#L20-2 assume !!(0 != gcd_test_~b); 175#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 174#L20-2 [2018-12-09 09:19:00,321 INFO L796 eck$LassoCheckResult]: Loop: 174#L20-2 assume !!(0 != gcd_test_~b); 173#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 174#L20-2 [2018-12-09 09:19:00,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash -917678379, now seen corresponding path program 3 times [2018-12-09 09:19:00,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:00,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:00,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:00,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 4 times [2018-12-09 09:19:00,331 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:00,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:00,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:00,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1420625670, now seen corresponding path program 3 times [2018-12-09 09:19:00,334 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:00,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:00,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:00,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:00,420 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 09:19:00,421 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 09:19:00,421 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 09:19:00,421 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 09:19:00,421 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 09:19:00,421 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 09:19:00,421 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 09:19:00,421 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 09:19:00,421 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration4_Lasso [2018-12-09 09:19:00,421 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 09:19:00,421 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 09:19:00,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,450 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,514 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 09:19:00,514 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:00,517 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 09:19:00,517 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:00,540 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 09:19:00,540 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 09:19:00,744 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-09 09:19:00,745 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 09:19:00,745 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 09:19:00,745 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 09:19:00,745 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 09:19:00,746 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 09:19:00,746 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 09:19:00,746 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 09:19:00,746 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 09:19:00,746 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration4_Lasso [2018-12-09 09:19:00,746 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 09:19:00,746 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 09:19:00,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:00,832 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 09:19:00,835 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 09:19:00,836 INFO L122 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 [2018-12-09 09:19:00,837 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 09:19:00,838 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 09:19:00,838 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 09:19:00,838 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 09:19:00,838 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 09:19:00,839 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 09:19:00,839 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 09:19:00,840 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 09:19:00,841 INFO L122 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 [2018-12-09 09:19:00,841 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 09:19:00,841 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 09:19:00,841 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-09 09:19:00,842 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 09:19:00,847 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-09 09:19:00,847 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-09 09:19:00,896 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 09:19:00,934 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2018-12-09 09:19:00,934 INFO L444 ModelExtractionUtils]: 25 out of 36 variables were initially zero. Simplification set additionally 5 variables to zero. [2018-12-09 09:19:00,935 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 09:19:00,937 INFO L440 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 4. [2018-12-09 09:19:00,938 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 09:19:00,938 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_gcd_test_~b) = 1*ULTIMATE.start_gcd_test_~b Supporting invariants [1*ULTIMATE.start_gcd_test_~a - 1 >= 0, 1*ULTIMATE.start_gcd_test_~b >= 0] [2018-12-09 09:19:00,949 INFO L297 tatePredicateManager]: 1 out of 2 supporting invariants were superfluous and have been removed [2018-12-09 09:19:00,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:19:00,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:19:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:19:01,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:19:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:01,012 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.4 stem predicates 1 loop predicates [2018-12-09 09:19:01,013 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 6 states. [2018-12-09 09:19:01,076 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 13 transitions. cyclomatic complexity: 2. Second operand 6 states. Result 19 states and 22 transitions. Complement of second has 5 states. [2018-12-09 09:19:01,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-12-09 09:19:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-09 09:19:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-12-09 09:19:01,078 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 2 letters. [2018-12-09 09:19:01,079 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 09:19:01,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 12 letters. Loop has 2 letters. [2018-12-09 09:19:01,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 09:19:01,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 4 letters. [2018-12-09 09:19:01,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 09:19:01,080 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 22 transitions. [2018-12-09 09:19:01,081 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:01,081 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 19 states and 22 transitions. [2018-12-09 09:19:01,082 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-12-09 09:19:01,082 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2018-12-09 09:19:01,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 22 transitions. [2018-12-09 09:19:01,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 09:19:01,082 INFO L705 BuchiCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-12-09 09:19:01,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 22 transitions. [2018-12-09 09:19:01,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-12-09 09:19:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-09 09:19:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2018-12-09 09:19:01,084 INFO L728 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2018-12-09 09:19:01,084 INFO L608 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2018-12-09 09:19:01,084 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-09 09:19:01,084 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2018-12-09 09:19:01,084 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:01,085 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 09:19:01,085 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 09:19:01,085 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2018-12-09 09:19:01,085 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-09 09:19:01,085 INFO L794 eck$LassoCheckResult]: Stem: 272#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 273#L12 assume !(gcd_test_~a < 0); 270#L12-2 assume !(gcd_test_~b < 0); 271#L13-1 assume !(0 == gcd_test_~a); 274#L20-2 assume !!(0 != gcd_test_~b); 282#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 280#L20-2 assume !!(0 != gcd_test_~b); 276#L20 [2018-12-09 09:19:01,085 INFO L796 eck$LassoCheckResult]: Loop: 276#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 275#L20-2 assume !!(0 != gcd_test_~b); 276#L20 [2018-12-09 09:19:01,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:01,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1481232980, now seen corresponding path program 4 times [2018-12-09 09:19:01,086 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:01,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:01,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:01,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:01,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:01,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:01,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1918, now seen corresponding path program 1 times [2018-12-09 09:19:01,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:01,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:01,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:01,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:01,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:01,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1830717847, now seen corresponding path program 5 times [2018-12-09 09:19:01,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:01,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:01,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:01,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 09:19:01,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:01,118 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 09:19:01,118 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 09:19:01,118 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 09:19:01,118 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 09:19:01,118 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 09:19:01,118 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 09:19:01,118 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 09:19:01,118 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 09:19:01,119 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration5_Loop [2018-12-09 09:19:01,119 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 09:19:01,119 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 09:19:01,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,143 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 09:19:01,144 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:01,145 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 09:19:01,145 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:01,162 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 09:19:01,162 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 09:19:01,238 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 09:19:01,238 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_gcd_test_~a=-6, ULTIMATE.start_gcd_test_~b=-7} Honda state: {ULTIMATE.start_gcd_test_~a=-6, ULTIMATE.start_gcd_test_~b=-7} Generalized eigenvectors: [{ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=7, ULTIMATE.start_gcd_test_~b=0}] Lambdas: [1, 0, 1] Nus: [0, 0] [2018-12-09 09:19:01,282 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 09:19:01,282 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 09:19:01,282 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 09:19:01,282 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 09:19:01,282 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 09:19:01,282 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 09:19:01,282 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 09:19:01,282 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 09:19:01,282 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration5_Lasso [2018-12-09 09:19:01,282 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 09:19:01,282 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 09:19:01,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,353 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 09:19:01,353 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:01,354 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 09:19:01,355 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 09:19:01,356 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 09:19:01,356 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:01,370 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 09:19:01,370 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:01,397 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 09:19:01,397 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 09:19:01,932 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-09 09:19:01,934 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 09:19:01,934 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 09:19:01,934 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 09:19:01,934 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 09:19:01,934 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-09 09:19:01,934 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 09:19:01,934 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 09:19:01,934 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 09:19:01,935 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration5_Lasso [2018-12-09 09:19:01,935 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 09:19:01,935 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 09:19:01,936 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:01,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:02,021 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 09:19:02,021 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-09 09:19:02,022 INFO L122 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 [2018-12-09 09:19:02,022 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 09:19:02,022 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 09:19:02,023 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 09:19:02,023 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 09:19:02,023 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 09:19:02,023 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 09:19:02,023 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 09:19:02,024 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 09:19:02,024 INFO L122 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 [2018-12-09 09:19:02,024 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 09:19:02,024 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-09 09:19:02,024 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 09:19:02,024 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-09 09:19:02,024 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 09:19:02,025 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-09 09:19:02,025 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-09 09:19:02,025 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-09 09:19:02,025 INFO L122 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 [2018-12-09 09:19:02,026 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-09 09:19:02,026 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-09 09:19:02,026 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-09 09:19:02,026 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-09 09:19:02,029 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-09 09:19:02,029 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-09 09:19:02,057 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-09 09:19:02,078 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2018-12-09 09:19:02,079 INFO L444 ModelExtractionUtils]: 29 out of 36 variables were initially zero. Simplification set additionally 3 variables to zero. [2018-12-09 09:19:02,079 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-09 09:19:02,080 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-12-09 09:19:02,081 INFO L518 LassoAnalysis]: Proved termination. [2018-12-09 09:19:02,081 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_gcd_test_~a, ULTIMATE.start_gcd_test_~b) = 1*ULTIMATE.start_gcd_test_~a - 1*ULTIMATE.start_gcd_test_~b Supporting invariants [1*ULTIMATE.start_gcd_test_~b >= 0] [2018-12-09 09:19:02,082 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-12-09 09:19:02,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:19:02,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:19:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:19:02,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:19:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:02,119 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 2 loop predicates [2018-12-09 09:19:02,119 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 4 states. [2018-12-09 09:19:02,141 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 24 states and 30 transitions. Complement of second has 6 states. [2018-12-09 09:19:02,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-12-09 09:19:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-09 09:19:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2018-12-09 09:19:02,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 7 letters. Loop has 2 letters. [2018-12-09 09:19:02,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 09:19:02,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 9 letters. Loop has 2 letters. [2018-12-09 09:19:02,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 09:19:02,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 7 letters. Loop has 4 letters. [2018-12-09 09:19:02,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-09 09:19:02,142 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 30 transitions. [2018-12-09 09:19:02,143 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:02,143 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 18 states and 22 transitions. [2018-12-09 09:19:02,143 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2018-12-09 09:19:02,143 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2018-12-09 09:19:02,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 22 transitions. [2018-12-09 09:19:02,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 09:19:02,143 INFO L705 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-12-09 09:19:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 22 transitions. [2018-12-09 09:19:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2018-12-09 09:19:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-09 09:19:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-12-09 09:19:02,145 INFO L728 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-12-09 09:19:02,145 INFO L608 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-12-09 09:19:02,145 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-09 09:19:02,145 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2018-12-09 09:19:02,145 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:02,145 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 09:19:02,145 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 09:19:02,145 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 3, 1, 1, 1, 1, 1] [2018-12-09 09:19:02,145 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-09 09:19:02,145 INFO L794 eck$LassoCheckResult]: Stem: 370#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 371#L12 assume !(gcd_test_~a < 0); 368#L12-2 assume !(gcd_test_~b < 0); 369#L13-1 assume !(0 == gcd_test_~a); 372#L20-2 assume !!(0 != gcd_test_~b); 377#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 378#L20-2 assume !!(0 != gcd_test_~b); 379#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 375#L20-2 assume !!(0 != gcd_test_~b); 376#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 382#L20-2 assume !!(0 != gcd_test_~b); 381#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 380#L20-2 assume !!(0 != gcd_test_~b); 374#L20 [2018-12-09 09:19:02,146 INFO L796 eck$LassoCheckResult]: Loop: 374#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 373#L20-2 assume !!(0 != gcd_test_~b); 374#L20 [2018-12-09 09:19:02,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:02,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1089722783, now seen corresponding path program 4 times [2018-12-09 09:19:02,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:02,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:02,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:02,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:02,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:02,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1918, now seen corresponding path program 2 times [2018-12-09 09:19:02,152 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:02,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:02,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:02,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:02,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:02,154 INFO L82 PathProgramCache]: Analyzing trace with hash 748426718, now seen corresponding path program 5 times [2018-12-09 09:19:02,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:02,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:02,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:02,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:19:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:02,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:19:02,217 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:19:02,224 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-09 09:19:02,237 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-09 09:19:02,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:19:02,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:19:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:02,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 09:19:02,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-12-09 09:19:02,341 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 09:19:02,341 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 09:19:02,341 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 09:19:02,341 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 09:19:02,341 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 09:19:02,341 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 09:19:02,341 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 09:19:02,341 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 09:19:02,341 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration6_Loop [2018-12-09 09:19:02,341 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 09:19:02,341 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 09:19:02,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:02,361 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 09:19:02,361 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:02,362 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 09:19:02,363 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:02,382 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 09:19:02,382 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 09:19:02,448 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 09:19:02,448 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_gcd_test_~a=-6, ULTIMATE.start_gcd_test_~b=-7} Honda state: {ULTIMATE.start_gcd_test_~a=-6, ULTIMATE.start_gcd_test_~b=-7} Generalized eigenvectors: [{ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=7, ULTIMATE.start_gcd_test_~b=0}] Lambdas: [1, 0, 1] Nus: [0, 0] [2018-12-09 09:19:02,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-09 09:19:02,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-12-09 09:19:02,471 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 12 states. [2018-12-09 09:19:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:19:02,526 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-12-09 09:19:02,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 09:19:02,527 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 22 transitions. [2018-12-09 09:19:02,527 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:02,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 19 states and 21 transitions. [2018-12-09 09:19:02,528 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2018-12-09 09:19:02,528 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2018-12-09 09:19:02,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2018-12-09 09:19:02,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-09 09:19:02,528 INFO L705 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-12-09 09:19:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2018-12-09 09:19:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-09 09:19:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-09 09:19:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-12-09 09:19:02,529 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-12-09 09:19:02,529 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-12-09 09:19:02,529 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-12-09 09:19:02,529 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 21 transitions. [2018-12-09 09:19:02,529 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-09 09:19:02,529 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-09 09:19:02,529 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-09 09:19:02,530 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 3, 2, 1, 1, 1, 1] [2018-12-09 09:19:02,530 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-09 09:19:02,530 INFO L794 eck$LassoCheckResult]: Stem: 466#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 467#L12 assume !(gcd_test_~a < 0); 464#L12-2 assume !(gcd_test_~b < 0); 465#L13-1 assume !(0 == gcd_test_~a); 468#L20-2 assume !!(0 != gcd_test_~b); 473#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 471#L20-2 assume !!(0 != gcd_test_~b); 472#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 474#L20-2 assume !!(0 != gcd_test_~b); 482#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 481#L20-2 assume !!(0 != gcd_test_~b); 479#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 478#L20-2 assume !!(0 != gcd_test_~b); 477#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 475#L20-2 assume !!(0 != gcd_test_~b); 470#L20 [2018-12-09 09:19:02,530 INFO L796 eck$LassoCheckResult]: Loop: 470#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 469#L20-2 assume !!(0 != gcd_test_~b); 470#L20 [2018-12-09 09:19:02,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash 748426780, now seen corresponding path program 6 times [2018-12-09 09:19:02,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:02,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:02,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:02,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 09:19:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:02,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 09:19:02,600 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 09:19:02,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-09 09:19:02,621 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-12-09 09:19:02,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 09:19:02,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 09:19:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 09:19:02,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-09 09:19:02,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-09 09:19:02,681 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-09 09:19:02,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 09:19:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1918, now seen corresponding path program 3 times [2018-12-09 09:19:02,681 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-09 09:19:02,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-09 09:19:02,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 09:19:02,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 09:19:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 09:19:02,690 INFO L216 LassoAnalysis]: Preferences: [2018-12-09 09:19:02,690 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-09 09:19:02,691 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-09 09:19:02,691 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-09 09:19:02,691 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-09 09:19:02,691 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-09 09:19:02,691 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-09 09:19:02,691 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-09 09:19:02,691 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration7_Loop [2018-12-09 09:19:02,691 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-09 09:19:02,691 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-09 09:19:02,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-09 09:19:02,717 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-09 09:19:02,717 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:02,721 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-09 09:19:02,721 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e47a45ad-cda8-45c5-9c73-3c88db4a2367/bin-2019/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 [2018-12-09 09:19:02,738 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-09 09:19:02,738 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-09 09:19:02,803 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-09 09:19:02,803 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_gcd_test_~a=-6, ULTIMATE.start_gcd_test_~b=-7} Honda state: {ULTIMATE.start_gcd_test_~a=-6, ULTIMATE.start_gcd_test_~b=-7} Generalized eigenvectors: [{ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=0, ULTIMATE.start_gcd_test_~b=0}, {ULTIMATE.start_gcd_test_~a=7, ULTIMATE.start_gcd_test_~b=0}] Lambdas: [1, 0, 1] Nus: [0, 0] [2018-12-09 09:19:02,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 09:19:02,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-09 09:19:02,817 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. cyclomatic complexity: 4 Second operand 9 states. [2018-12-09 09:19:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 09:19:02,860 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2018-12-09 09:19:02,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 09:19:02,860 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 14 transitions. [2018-12-09 09:19:02,860 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-09 09:19:02,860 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 0 states and 0 transitions. [2018-12-09 09:19:02,860 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-09 09:19:02,860 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-09 09:19:02,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-09 09:19:02,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-09 09:19:02,861 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 09:19:02,861 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 09:19:02,861 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 09:19:02,861 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-12-09 09:19:02,861 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-09 09:19:02,861 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-09 09:19:02,861 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-09 09:19:02,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.12 09:19:02 BoogieIcfgContainer [2018-12-09 09:19:02,865 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-09 09:19:02,865 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 09:19:02,865 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 09:19:02,865 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 09:19:02,865 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:18:59" (3/4) ... [2018-12-09 09:19:02,867 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-09 09:19:02,867 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 09:19:02,868 INFO L168 Benchmark]: Toolchain (without parser) took 3381.58 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.0 MB). Free memory was 961.3 MB in the beginning and 1.1 GB in the end (delta: -90.2 MB). Peak memory consumption was 93.9 MB. Max. memory is 11.5 GB. [2018-12-09 09:19:02,869 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:19:02,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.79 ms. Allocated memory is still 1.0 GB. Free memory was 961.3 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 09:19:02,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.18 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:19:02,870 INFO L168 Benchmark]: Boogie Preprocessor took 11.76 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 945.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-09 09:19:02,870 INFO L168 Benchmark]: RCFGBuilder took 156.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 70.3 MB). Free memory was 945.2 MB in the beginning and 1.0 GB in the end (delta: -99.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2018-12-09 09:19:02,870 INFO L168 Benchmark]: BuchiAutomizer took 3065.09 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 113.8 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -7.3 MB). Peak memory consumption was 106.5 MB. Max. memory is 11.5 GB. [2018-12-09 09:19:02,871 INFO L168 Benchmark]: Witness Printer took 2.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 09:19:02,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 123.79 ms. Allocated memory is still 1.0 GB. Free memory was 961.3 MB in the beginning and 950.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.18 ms. Allocated memory is still 1.0 GB. Free memory is still 950.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.76 ms. Allocated memory is still 1.0 GB. Free memory was 950.6 MB in the beginning and 945.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 156.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 70.3 MB). Free memory was 945.2 MB in the beginning and 1.0 GB in the end (delta: -99.0 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3065.09 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 113.8 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -7.3 MB). Peak memory consumption was 106.5 MB. Max. memory is 11.5 GB. * Witness Printer took 2.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (5 trivial, 2 deterministic, 0 nondeterministic). One deterministic module has affine ranking function b and consists of 4 locations. One deterministic module has affine ranking function a + -1 * b and consists of 4 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.0s and 8 iterations. TraceHistogramMax:6. Analysis of lassos took 2.6s. Construction of modules took 0.1s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 4. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 19 states and ocurred in iteration 6. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 26 SDtfs, 31 SDslu, 12 SDs, 0 SdLazy, 223 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT0 conc4 concLT0 SILN1 SILU0 SILI0 SILT0 lasso2 LassoPreprocessingBenchmarks: Lassos: inital28 mio100 ax100 hnf90 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq191 hnf92 smp100 dnf141 smp100 tf102 neg96 sie113 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 96ms VariablesStem: 6 VariablesLoop: 3 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 1 LassoNonterminationAnalysisSatUnbounded: 3 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...