./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_8005b8cd-1f31-4239-aa17-c5523fa3b110/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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_8005b8cd-1f31-4239-aa17-c5523fa3b110/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:09,633 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 13:01:09,635 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 13:01:09,641 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 13:01:09,641 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 13:01:09,641 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 13:01:09,642 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 13:01:09,643 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 13:01:09,644 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 13:01:09,644 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 13:01:09,644 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 13:01:09,645 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 13:01:09,645 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 13:01:09,645 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 13:01:09,646 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 13:01:09,646 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 13:01:09,647 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 13:01:09,648 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 13:01:09,648 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 13:01:09,649 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 13:01:09,650 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 13:01:09,650 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 13:01:09,651 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 13:01:09,652 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 13:01:09,652 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 13:01:09,652 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 13:01:09,653 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 13:01:09,653 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 13:01:09,653 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 13:01:09,654 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 13:01:09,654 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 13:01:09,654 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 13:01:09,655 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 13:01:09,655 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 13:01:09,655 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 13:01:09,655 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 13:01:09,656 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/bin-2019/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2018-12-01 13:01:09,663 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 13:01:09,664 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 13:01:09,664 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 13:01:09,664 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 13:01:09,664 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 13:01:09,665 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-01 13:01:09,665 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-01 13:01:09,665 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-01 13:01:09,665 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-01 13:01:09,665 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-01 13:01:09,665 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-01 13:01:09,665 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 13:01:09,665 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 13:01:09,665 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-01 13:01:09,665 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 13:01:09,665 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 13:01:09,666 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 13:01:09,666 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-01 13:01:09,666 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-01 13:01:09,666 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-01 13:01:09,666 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 13:01:09,666 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 13:01:09,666 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-01 13:01:09,666 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 13:01:09,666 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-01 13:01:09,666 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 13:01:09,667 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 13:01:09,667 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-01 13:01:09,667 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 13:01:09,667 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 13:01:09,667 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-01 13:01:09,667 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-01 13:01:09,668 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_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:09,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 13:01:09,695 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 13:01:09,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 13:01:09,699 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 13:01:09,699 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 13:01:09,699 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/bin-2019/uautomizer/../../sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-12-01 13:01:09,735 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/bin-2019/uautomizer/data/595d09652/57e15c4e114a4fbe92b9cf9910b20d98/FLAG2b5202290 [2018-12-01 13:01:10,147 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 13:01:10,147 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/sv-benchmarks/c/bitvector/gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-12-01 13:01:10,151 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/bin-2019/uautomizer/data/595d09652/57e15c4e114a4fbe92b9cf9910b20d98/FLAG2b5202290 [2018-12-01 13:01:10,159 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/bin-2019/uautomizer/data/595d09652/57e15c4e114a4fbe92b9cf9910b20d98 [2018-12-01 13:01:10,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 13:01:10,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 13:01:10,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 13:01:10,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 13:01:10,164 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 13:01:10,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c04efe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10, skipping insertion in model container [2018-12-01 13:01:10,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 13:01:10,180 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 13:01:10,263 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 13:01:10,265 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 13:01:10,275 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 13:01:10,282 INFO L195 MainTranslator]: Completed translation [2018-12-01 13:01:10,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10 WrapperNode [2018-12-01 13:01:10,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 13:01:10,283 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 13:01:10,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 13:01:10,283 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 13:01:10,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,291 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 13:01:10,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 13:01:10,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 13:01:10,302 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 13:01:10,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... [2018-12-01 13:01:10,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 13:01:10,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 13:01:10,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 13:01:10,314 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 13:01:10,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:10,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 13:01:10,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 13:01:10,460 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 13:01:10,460 INFO L280 CfgBuilder]: Removed 13 assue(true) statements. [2018-12-01 13:01:10,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:01:10 BoogieIcfgContainer [2018-12-01 13:01:10,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 13:01:10,461 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-01 13:01:10,461 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-01 13:01:10,463 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-01 13:01:10,463 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-01 13:01:10,463 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 01.12 01:01:10" (1/3) ... [2018-12-01 13:01:10,464 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7eb34852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 01:01:10, skipping insertion in model container [2018-12-01 13:01:10,464 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-01 13:01:10,464 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:01:10" (2/3) ... [2018-12-01 13:01:10,465 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7eb34852 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 01:01:10, skipping insertion in model container [2018-12-01 13:01:10,465 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-01 13:01:10,465 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:01:10" (3/3) ... [2018-12-01 13:01:10,466 INFO L375 chiAutomizerObserver]: Analyzing ICFG gcd_4_true-unreach-call_true-no-overflow_true-termination.i [2018-12-01 13:01:10,501 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 13:01:10,502 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-01 13:01:10,502 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-01 13:01:10,502 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-01 13:01:10,502 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 13:01:10,502 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 13:01:10,502 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-01 13:01:10,502 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 13:01:10,502 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-01 13:01:10,511 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-12-01 13:01:10,524 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:10,524 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 13:01:10,524 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 13:01:10,528 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-12-01 13:01:10,528 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-01 13:01:10,528 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-01 13:01:10,529 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2018-12-01 13:01:10,530 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:10,530 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 13:01:10,530 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 13:01:10,530 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-12-01 13:01:10,530 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-01 13:01:10,534 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 15#L12true assume !(gcd_test_~a < 0); 12#L12-2true assume !(gcd_test_~b < 0); 16#L13-1true assume !(0 == gcd_test_~a); 8#L20-2true [2018-12-01 13:01:10,535 INFO L796 eck$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 [2018-12-01 13:01:10,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:10,538 INFO L82 PathProgramCache]: Analyzing trace with hash 959468, now seen corresponding path program 1 times [2018-12-01 13:01:10,539 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:10,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:10,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:01:10,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:10,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 1 times [2018-12-01 13:01:10,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:10,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:10,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:01:10,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:10,610 INFO L82 PathProgramCache]: Analyzing trace with hash 922049617, now seen corresponding path program 1 times [2018-12-01 13:01:10,610 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:10,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:10,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:01:10,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:10,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 13:01:10,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2018-12-01 13:01:10,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-01 13:01:10,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-01 13:01:10,688 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2018-12-01 13:01:10,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:01:10,708 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2018-12-01 13:01:10,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-01 13:01:10,709 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 23 transitions. [2018-12-01 13:01:10,710 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:10,712 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 8 states and 9 transitions. [2018-12-01 13:01:10,713 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2018-12-01 13:01:10,713 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2018-12-01 13:01:10,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2018-12-01 13:01:10,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-01 13:01:10,714 INFO L705 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-12-01 13:01:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2018-12-01 13:01:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-12-01 13:01:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-01 13:01:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-12-01 13:01:10,729 INFO L728 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-12-01 13:01:10,730 INFO L608 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-12-01 13:01:10,730 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-01 13:01:10,730 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2018-12-01 13:01:10,730 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:10,730 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 13:01:10,730 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 13:01:10,730 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2018-12-01 13:01:10,730 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-01 13:01:10,731 INFO L794 eck$LassoCheckResult]: Stem: 55#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 56#L12 assume !(gcd_test_~a < 0); 53#L12-2 assume !(gcd_test_~b < 0); 54#L13-1 assume !(0 == gcd_test_~a); 57#L20-2 assume !!(0 != gcd_test_~b); 60#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 58#L20-2 [2018-12-01 13:01:10,731 INFO L796 eck$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 [2018-12-01 13:01:10,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash 922049615, now seen corresponding path program 1 times [2018-12-01 13:01:10,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:10,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:10,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:01:10,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:10,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 2 times [2018-12-01 13:01:10,738 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:10,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:10,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:01:10,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:10,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1326417908, now seen corresponding path program 1 times [2018-12-01 13:01:10,742 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:10,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:10,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:10,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:10,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:01:10,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:10,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:01:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:10,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:01:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:10,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:01:10,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2018-12-01 13:01:10,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 13:01:10,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-01 13:01:10,831 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 6 states. [2018-12-01 13:01:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:01:10,857 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2018-12-01 13:01:10,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-01 13:01:10,858 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2018-12-01 13:01:10,859 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:10,859 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2018-12-01 13:01:10,859 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2018-12-01 13:01:10,859 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2018-12-01 13:01:10,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2018-12-01 13:01:10,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-01 13:01:10,859 INFO L705 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-12-01 13:01:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2018-12-01 13:01:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-12-01 13:01:10,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-12-01 13:01:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-12-01 13:01:10,860 INFO L728 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-12-01 13:01:10,860 INFO L608 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2018-12-01 13:01:10,860 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-01 13:01:10,860 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2018-12-01 13:01:10,861 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:10,861 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 13:01:10,861 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 13:01:10,861 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2018-12-01 13:01:10,861 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-01 13:01:10,861 INFO L794 eck$LassoCheckResult]: Stem: 105#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 106#L12 assume !(gcd_test_~a < 0); 103#L12-2 assume !(gcd_test_~b < 0); 104#L13-1 assume !(0 == gcd_test_~a); 107#L20-2 assume !!(0 != gcd_test_~b); 110#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 108#L20-2 assume !!(0 != gcd_test_~b); 109#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 112#L20-2 [2018-12-01 13:01:10,861 INFO L796 eck$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 [2018-12-01 13:01:10,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1326417906, now seen corresponding path program 2 times [2018-12-01 13:01:10,862 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:10,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:10,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:01:10,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:10,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 3 times [2018-12-01 13:01:10,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:10,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:10,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:10,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:10,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:10,876 INFO L82 PathProgramCache]: Analyzing trace with hash -917678377, now seen corresponding path program 2 times [2018-12-01 13:01:10,876 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:10,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:10,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:10,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:10,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:01:10,916 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:10,923 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 13:01:10,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 13:01:10,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:01:10,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:01:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:10,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:01:10,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2018-12-01 13:01:10,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 13:01:10,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-12-01 13:01:10,997 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 8 states. [2018-12-01 13:01:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:01:11,012 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-12-01 13:01:11,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 13:01:11,012 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2018-12-01 13:01:11,013 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:11,013 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2018-12-01 13:01:11,013 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-12-01 13:01:11,013 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-12-01 13:01:11,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2018-12-01 13:01:11,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-01 13:01:11,014 INFO L705 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-12-01 13:01:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2018-12-01 13:01:11,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-12-01 13:01:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-12-01 13:01:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-12-01 13:01:11,015 INFO L728 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-12-01 13:01:11,015 INFO L608 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-12-01 13:01:11,015 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-01 13:01:11,016 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2018-12-01 13:01:11,016 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:11,016 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 13:01:11,016 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 13:01:11,016 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1] [2018-12-01 13:01:11,016 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-01 13:01:11,017 INFO L794 eck$LassoCheckResult]: Stem: 167#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 168#L12 assume !(gcd_test_~a < 0); 165#L12-2 assume !(gcd_test_~b < 0); 166#L13-1 assume !(0 == gcd_test_~a); 169#L20-2 assume !!(0 != gcd_test_~b); 172#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 170#L20-2 assume !!(0 != gcd_test_~b); 171#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 176#L20-2 assume !!(0 != gcd_test_~b); 175#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 174#L20-2 [2018-12-01 13:01:11,017 INFO L796 eck$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 [2018-12-01 13:01:11,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash -917678379, now seen corresponding path program 3 times [2018-12-01 13:01:11,017 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:11,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:11,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:11,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:11,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1830, now seen corresponding path program 4 times [2018-12-01 13:01:11,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:11,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:11,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:11,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:11,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1420625670, now seen corresponding path program 3 times [2018-12-01 13:01:11,032 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:11,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:11,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:11,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,103 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 13:01:11,104 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 13:01:11,104 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 13:01:11,104 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 13:01:11,104 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 13:01:11,104 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 13:01:11,104 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 13:01:11,104 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 13:01:11,104 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration4_Lasso [2018-12-01 13:01:11,104 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 13:01:11,104 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 13:01:11,114 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,128 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,188 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 13:01:11,189 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:11,192 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 13:01:11,192 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:11,216 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 13:01:11,216 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 13:01:11,418 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-01 13:01:11,420 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 13:01:11,420 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 13:01:11,420 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 13:01:11,420 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 13:01:11,420 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-01 13:01:11,420 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 13:01:11,421 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 13:01:11,421 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 13:01:11,421 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration4_Lasso [2018-12-01 13:01:11,421 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 13:01:11,421 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 13:01:11,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,438 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,493 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 13:01:11,496 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-01 13:01:11,497 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 [2018-12-01 13:01:11,498 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 13:01:11,499 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 13:01:11,499 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 13:01:11,499 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 13:01:11,499 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 13:01:11,500 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 13:01:11,500 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 13:01:11,502 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 13:01:11,502 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 [2018-12-01 13:01:11,502 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 13:01:11,502 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 13:01:11,502 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-01 13:01:11,503 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 13:01:11,511 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-01 13:01:11,511 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-01 13:01:11,581 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-01 13:01:11,627 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2018-12-01 13:01:11,627 INFO L444 ModelExtractionUtils]: 25 out of 36 variables were initially zero. Simplification set additionally 5 variables to zero. [2018-12-01 13:01:11,628 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-01 13:01:11,631 INFO L440 nArgumentSynthesizer]: Removed 2 redundant supporting invariants from a total of 4. [2018-12-01 13:01:11,631 INFO L518 LassoAnalysis]: Proved termination. [2018-12-01 13:01:11,632 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] [2018-12-01 13:01:11,635 INFO L297 tatePredicateManager]: 1 out of 2 supporting invariants were superfluous and have been removed [2018-12-01 13:01:11,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:11,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:01:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:11,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:01:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:11,700 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 [2018-12-01 13:01:11,700 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 6 states. [2018-12-01 13:01:11,754 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. [2018-12-01 13:01:11,755 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 [2018-12-01 13:01:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-12-01 13:01:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2018-12-01 13:01:11,756 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 2 letters. [2018-12-01 13:01:11,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 13:01:11,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 12 letters. Loop has 2 letters. [2018-12-01 13:01:11,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 13:01:11,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 10 letters. Loop has 4 letters. [2018-12-01 13:01:11,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 13:01:11,758 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 22 transitions. [2018-12-01 13:01:11,759 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:11,759 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 19 states and 22 transitions. [2018-12-01 13:01:11,759 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-12-01 13:01:11,760 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2018-12-01 13:01:11,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 22 transitions. [2018-12-01 13:01:11,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 13:01:11,760 INFO L705 BuchiCegarLoop]: Abstraction has 19 states and 22 transitions. [2018-12-01 13:01:11,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 22 transitions. [2018-12-01 13:01:11,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-12-01 13:01:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-01 13:01:11,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2018-12-01 13:01:11,762 INFO L728 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2018-12-01 13:01:11,762 INFO L608 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2018-12-01 13:01:11,762 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-01 13:01:11,762 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2018-12-01 13:01:11,763 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:11,763 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 13:01:11,763 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 13:01:11,763 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2018-12-01 13:01:11,763 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-01 13:01:11,763 INFO L794 eck$LassoCheckResult]: Stem: 272#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 273#L12 assume !(gcd_test_~a < 0); 270#L12-2 assume !(gcd_test_~b < 0); 271#L13-1 assume !(0 == gcd_test_~a); 274#L20-2 assume !!(0 != gcd_test_~b); 282#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 280#L20-2 assume !!(0 != gcd_test_~b); 276#L20 [2018-12-01 13:01:11,764 INFO L796 eck$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 [2018-12-01 13:01:11,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:11,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1481232980, now seen corresponding path program 4 times [2018-12-01 13:01:11,764 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:11,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:11,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:11,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:11,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1918, now seen corresponding path program 1 times [2018-12-01 13:01:11,771 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:11,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:11,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:11,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1830717847, now seen corresponding path program 5 times [2018-12-01 13:01:11,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:11,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:11,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 13:01:11,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:11,789 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 13:01:11,789 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 13:01:11,789 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 13:01:11,789 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 13:01:11,789 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 13:01:11,789 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 13:01:11,790 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 13:01:11,790 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 13:01:11,790 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration5_Loop [2018-12-01 13:01:11,790 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 13:01:11,790 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 13:01:11,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,817 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 13:01:11,817 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:11,819 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 13:01:11,819 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:11,847 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 13:01:11,847 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 13:01:11,922 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 13:01:11,922 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] [2018-12-01 13:01:11,961 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 13:01:11,961 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 13:01:11,961 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 13:01:11,961 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 13:01:11,961 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 13:01:11,961 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 13:01:11,961 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 13:01:11,962 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 13:01:11,962 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration5_Lasso [2018-12-01 13:01:11,962 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 13:01:11,962 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 13:01:11,963 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,964 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:11,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:12,047 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 13:01:12,047 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:12,050 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 13:01:12,050 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 13:01:12,052 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 13:01:12,052 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_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:12,066 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 13:01:12,066 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:12,085 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 13:01:12,085 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 13:01:12,632 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-01 13:01:12,634 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 13:01:12,634 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 13:01:12,634 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 13:01:12,634 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 13:01:12,634 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-01 13:01:12,634 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 13:01:12,634 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 13:01:12,634 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 13:01:12,634 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration5_Lasso [2018-12-01 13:01:12,634 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 13:01:12,634 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 13:01:12,635 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:12,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:12,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:12,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:12,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:12,691 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 13:01:12,691 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-01 13:01:12,691 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 [2018-12-01 13:01:12,692 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 13:01:12,692 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 13:01:12,692 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 13:01:12,692 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 13:01:12,692 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 13:01:12,693 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 13:01:12,693 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 13:01:12,693 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 13:01:12,693 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 [2018-12-01 13:01:12,693 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 13:01:12,694 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 13:01:12,694 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 13:01:12,694 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 13:01:12,694 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 13:01:12,694 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 13:01:12,694 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 13:01:12,694 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 13:01:12,694 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 [2018-12-01 13:01:12,695 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 13:01:12,695 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 13:01:12,695 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-01 13:01:12,695 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 13:01:12,698 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-01 13:01:12,698 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-01 13:01:12,720 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-01 13:01:12,739 INFO L443 ModelExtractionUtils]: Simplification made 8 calls to the SMT solver. [2018-12-01 13:01:12,740 INFO L444 ModelExtractionUtils]: 29 out of 36 variables were initially zero. Simplification set additionally 3 variables to zero. [2018-12-01 13:01:12,740 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-01 13:01:12,741 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-12-01 13:01:12,741 INFO L518 LassoAnalysis]: Proved termination. [2018-12-01 13:01:12,741 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] [2018-12-01 13:01:12,743 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-12-01 13:01:12,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:12,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:01:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:12,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:01:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:12,786 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 [2018-12-01 13:01:12,787 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 4 states. [2018-12-01 13:01:12,812 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. [2018-12-01 13:01:12,812 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 [2018-12-01 13:01:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-01 13:01:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2018-12-01 13:01:12,812 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 7 letters. Loop has 2 letters. [2018-12-01 13:01:12,812 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 13:01:12,812 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 9 letters. Loop has 2 letters. [2018-12-01 13:01:12,812 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 13:01:12,813 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 7 letters. Loop has 4 letters. [2018-12-01 13:01:12,813 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 13:01:12,813 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 30 transitions. [2018-12-01 13:01:12,813 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:12,813 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 18 states and 22 transitions. [2018-12-01 13:01:12,813 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2018-12-01 13:01:12,814 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2018-12-01 13:01:12,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 22 transitions. [2018-12-01 13:01:12,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 13:01:12,814 INFO L705 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-12-01 13:01:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 22 transitions. [2018-12-01 13:01:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2018-12-01 13:01:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-01 13:01:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-12-01 13:01:12,815 INFO L728 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-12-01 13:01:12,815 INFO L608 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-12-01 13:01:12,815 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-01 13:01:12,815 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2018-12-01 13:01:12,815 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:12,815 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 13:01:12,815 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 13:01:12,815 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 3, 1, 1, 1, 1, 1] [2018-12-01 13:01:12,815 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-01 13:01:12,816 INFO L794 eck$LassoCheckResult]: Stem: 370#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 371#L12 assume !(gcd_test_~a < 0); 368#L12-2 assume !(gcd_test_~b < 0); 369#L13-1 assume !(0 == gcd_test_~a); 372#L20-2 assume !!(0 != gcd_test_~b); 377#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 378#L20-2 assume !!(0 != gcd_test_~b); 379#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 375#L20-2 assume !!(0 != gcd_test_~b); 376#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 382#L20-2 assume !!(0 != gcd_test_~b); 381#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 380#L20-2 assume !!(0 != gcd_test_~b); 374#L20 [2018-12-01 13:01:12,816 INFO L796 eck$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 [2018-12-01 13:01:12,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1089722783, now seen corresponding path program 4 times [2018-12-01 13:01:12,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:12,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:12,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:12,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:12,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:12,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1918, now seen corresponding path program 2 times [2018-12-01 13:01:12,821 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:12,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:12,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:12,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:12,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:12,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:12,823 INFO L82 PathProgramCache]: Analyzing trace with hash 748426718, now seen corresponding path program 5 times [2018-12-01 13:01:12,823 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:12,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:12,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:12,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:12,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:12,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:01:12,852 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:12,859 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 13:01:12,864 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-01 13:01:12,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:01:12,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:01:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:12,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:01:12,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-12-01 13:01:12,944 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 13:01:12,944 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 13:01:12,944 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 13:01:12,944 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 13:01:12,944 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 13:01:12,944 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 13:01:12,944 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 13:01:12,945 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 13:01:12,945 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration6_Loop [2018-12-01 13:01:12,945 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 13:01:12,945 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 13:01:12,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:12,968 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 13:01:12,968 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:12,970 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 13:01:12,970 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:12,988 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 13:01:12,988 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 13:01:13,054 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 13:01:13,054 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] [2018-12-01 13:01:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 13:01:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-12-01 13:01:13,069 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 12 states. [2018-12-01 13:01:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:01:13,129 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-12-01 13:01:13,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 13:01:13,130 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 22 transitions. [2018-12-01 13:01:13,130 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:13,131 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 19 states and 21 transitions. [2018-12-01 13:01:13,131 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2018-12-01 13:01:13,131 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2018-12-01 13:01:13,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 21 transitions. [2018-12-01 13:01:13,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 13:01:13,131 INFO L705 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-12-01 13:01:13,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 21 transitions. [2018-12-01 13:01:13,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-12-01 13:01:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-12-01 13:01:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2018-12-01 13:01:13,133 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-12-01 13:01:13,133 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 21 transitions. [2018-12-01 13:01:13,133 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-12-01 13:01:13,133 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 21 transitions. [2018-12-01 13:01:13,133 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2018-12-01 13:01:13,133 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 13:01:13,133 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 13:01:13,134 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [6, 3, 2, 1, 1, 1, 1] [2018-12-01 13:01:13,134 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2018-12-01 13:01:13,134 INFO L794 eck$LassoCheckResult]: Stem: 466#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret0, main_~x~0, main_~y~0, main_~g~0;havoc main_~x~0;havoc main_~y~0;havoc main_~g~0;main_~x~0 := 63;main_~y~0 := 18;gcd_test_#in~a, gcd_test_#in~b := main_~x~0, main_~y~0;havoc gcd_test_#res;havoc gcd_test_~a, gcd_test_~b;gcd_test_~a := gcd_test_#in~a;gcd_test_~b := gcd_test_#in~b; 467#L12 assume !(gcd_test_~a < 0); 464#L12-2 assume !(gcd_test_~b < 0); 465#L13-1 assume !(0 == gcd_test_~a); 468#L20-2 assume !!(0 != gcd_test_~b); 473#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 471#L20-2 assume !!(0 != gcd_test_~b); 472#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 474#L20-2 assume !!(0 != gcd_test_~b); 482#L20 assume gcd_test_~a > gcd_test_~b;gcd_test_~a := gcd_test_~a - gcd_test_~b; 481#L20-2 assume !!(0 != gcd_test_~b); 479#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 478#L20-2 assume !!(0 != gcd_test_~b); 477#L20 assume !(gcd_test_~a > gcd_test_~b);gcd_test_~b := gcd_test_~b - gcd_test_~a; 475#L20-2 assume !!(0 != gcd_test_~b); 470#L20 [2018-12-01 13:01:13,134 INFO L796 eck$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 [2018-12-01 13:01:13,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:13,134 INFO L82 PathProgramCache]: Analyzing trace with hash 748426780, now seen corresponding path program 6 times [2018-12-01 13:01:13,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:13,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:13,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:13,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:13,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 13:01:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:13,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 13:01:13,208 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:13,215 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 13:01:13,222 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-12-01 13:01:13,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 13:01:13,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 13:01:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 13:01:13,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 13:01:13,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-12-01 13:01:13,260 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-01 13:01:13,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 13:01:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1918, now seen corresponding path program 3 times [2018-12-01 13:01:13,261 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 13:01:13,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 13:01:13,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:13,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 13:01:13,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 13:01:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 13:01:13,271 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 13:01:13,271 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 13:01:13,271 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 13:01:13,271 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 13:01:13,271 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 13:01:13,271 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 13:01:13,271 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 13:01:13,271 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 13:01:13,271 INFO L131 ssoRankerPreferences]: Filename of dumped script: gcd_4_true-unreach-call_true-no-overflow_true-termination.i_Iteration7_Loop [2018-12-01 13:01:13,271 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 13:01:13,271 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 13:01:13,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 13:01:13,294 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 13:01:13,295 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:13,296 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 13:01:13,296 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8005b8cd-1f31-4239-aa17-c5523fa3b110/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 [2018-12-01 13:01:13,313 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 13:01:13,313 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 13:01:13,378 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 13:01:13,378 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] [2018-12-01 13:01:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 13:01:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-12-01 13:01:13,392 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. cyclomatic complexity: 4 Second operand 9 states. [2018-12-01 13:01:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 13:01:13,430 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2018-12-01 13:01:13,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 13:01:13,431 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 14 transitions. [2018-12-01 13:01:13,431 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-01 13:01:13,431 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 0 states and 0 transitions. [2018-12-01 13:01:13,431 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-01 13:01:13,431 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-01 13:01:13,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-01 13:01:13,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-01 13:01:13,431 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 13:01:13,431 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 13:01:13,431 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 13:01:13,431 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-12-01 13:01:13,432 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-01 13:01:13,432 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-01 13:01:13,432 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-01 13:01:13,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.12 01:01:13 BoogieIcfgContainer [2018-12-01 13:01:13,436 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-01 13:01:13,436 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 13:01:13,436 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 13:01:13,436 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 13:01:13,436 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:01:10" (3/4) ... [2018-12-01 13:01:13,438 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-01 13:01:13,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 13:01:13,439 INFO L168 Benchmark]: Toolchain (without parser) took 3277.86 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 957.1 MB in the beginning and 913.2 MB in the end (delta: 43.8 MB). Peak memory consumption was 150.8 MB. Max. memory is 11.5 GB. [2018-12-01 13:01:13,440 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:01:13,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 121.12 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 945.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. [2018-12-01 13:01:13,440 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.39 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:01:13,440 INFO L168 Benchmark]: Boogie Preprocessor took 11.40 ms. Allocated memory is still 1.0 GB. Free memory was 945.3 MB in the beginning and 939.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-01 13:01:13,441 INFO L168 Benchmark]: RCFGBuilder took 147.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -153.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. [2018-12-01 13:01:13,441 INFO L168 Benchmark]: BuchiAutomizer took 2974.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 913.2 MB in the end (delta: 179.9 MB). Peak memory consumption was 179.9 MB. Max. memory is 11.5 GB. [2018-12-01 13:01:13,441 INFO L168 Benchmark]: Witness Printer took 2.64 ms. Allocated memory is still 1.1 GB. Free memory is still 913.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 13:01:13,443 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 121.12 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 945.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 18.39 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.40 ms. Allocated memory is still 1.0 GB. Free memory was 945.3 MB in the beginning and 939.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 147.13 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.0 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -153.2 MB). Peak memory consumption was 13.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2974.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 913.2 MB in the end (delta: 179.9 MB). Peak memory consumption was 179.9 MB. Max. memory is 11.5 GB. * Witness Printer took 2.64 ms. Allocated memory is still 1.1 GB. Free memory is still 913.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 2.9s and 8 iterations. TraceHistogramMax:6. Analysis of lassos took 2.4s. 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: 129ms 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...