./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/GCD4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/GCD4.c -s /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e1a6e72adfb4c8fee6c8faa90b8bdc807e2f6147 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:00:46,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:00:46,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:00:46,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:00:46,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:00:46,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:00:46,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:00:46,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:00:46,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:00:46,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:00:46,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:00:46,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:00:46,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:00:46,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:00:46,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:00:46,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:00:46,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:00:46,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:00:46,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:00:46,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:00:46,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:00:46,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:00:46,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:00:46,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:00:46,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:00:46,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:00:46,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:00:46,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:00:46,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:00:46,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:00:46,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:00:46,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:00:46,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:00:46,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:00:46,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:00:46,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:00:46,404 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:00:46,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:00:46,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:00:46,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:00:46,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:00:46,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-10-22 09:00:46,420 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:00:46,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:00:46,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:00:46,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:00:46,421 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:00:46,422 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-10-22 09:00:46,422 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-10-22 09:00:46,422 INFO L138 SettingsManager]: * Use old map elimination=false [2019-10-22 09:00:46,422 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-10-22 09:00:46,422 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-10-22 09:00:46,422 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-10-22 09:00:46,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:00:46,423 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 09:00:46,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:00:46,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:00:46,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-10-22 09:00:46,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-10-22 09:00:46,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-10-22 09:00:46,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:00:46,424 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-10-22 09:00:46,425 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:00:46,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-10-22 09:00:46,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:00:46,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:00:46,425 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-10-22 09:00:46,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:00:46,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:00:46,426 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-10-22 09:00:46,427 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-10-22 09:00:46,427 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1a6e72adfb4c8fee6c8faa90b8bdc807e2f6147 [2019-10-22 09:00:46,452 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:00:46,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:00:46,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:00:46,466 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:00:46,467 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:00:46,467 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/GCD4.c [2019-10-22 09:00:46,514 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/data/20cd881a4/997c11d2c2484dcaa55ea5c54f2adfd9/FLAG10ac6bbe1 [2019-10-22 09:00:46,903 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:00:46,903 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/sv-benchmarks/c/termination-restricted-15/GCD4.c [2019-10-22 09:00:46,907 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/data/20cd881a4/997c11d2c2484dcaa55ea5c54f2adfd9/FLAG10ac6bbe1 [2019-10-22 09:00:47,300 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/data/20cd881a4/997c11d2c2484dcaa55ea5c54f2adfd9 [2019-10-22 09:00:47,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:00:47,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:00:47,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:47,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:00:47,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:00:47,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e35639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47, skipping insertion in model container [2019-10-22 09:00:47,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,318 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:00:47,333 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:00:47,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:47,463 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:00:47,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:47,546 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:00:47,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47 WrapperNode [2019-10-22 09:00:47,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:47,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:47,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:00:47,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:00:47,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:47,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:00:47,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:00:47,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:00:47,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,587 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... [2019-10-22 09:00:47,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:00:47,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:00:47,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:00:47,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:00:47,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:00:47,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:00:47,814 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:00:47,814 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-22 09:00:47,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:47 BoogieIcfgContainer [2019-10-22 09:00:47,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:00:47,816 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-10-22 09:00:47,816 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-10-22 09:00:47,820 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-10-22 09:00:47,821 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:00:47,821 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.10 09:00:47" (1/3) ... [2019-10-22 09:00:47,822 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@11572b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 09:00:47, skipping insertion in model container [2019-10-22 09:00:47,822 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:00:47,822 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:47" (2/3) ... [2019-10-22 09:00:47,823 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@11572b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 09:00:47, skipping insertion in model container [2019-10-22 09:00:47,823 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 09:00:47,823 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:47" (3/3) ... [2019-10-22 09:00:47,825 INFO L371 chiAutomizerObserver]: Analyzing ICFG GCD4.c [2019-10-22 09:00:47,874 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-10-22 09:00:47,874 INFO L357 BuchiCegarLoop]: Hoare is false [2019-10-22 09:00:47,874 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-10-22 09:00:47,874 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:00:47,874 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:00:47,874 INFO L361 BuchiCegarLoop]: Difference is false [2019-10-22 09:00:47,874 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:00:47,875 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-10-22 09:00:47,888 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-10-22 09:00:47,910 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-10-22 09:00:47,910 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:47,911 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:47,917 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-10-22 09:00:47,917 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 09:00:47,917 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-10-22 09:00:47,918 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-10-22 09:00:47,918 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-10-22 09:00:47,918 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:47,919 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:47,919 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-10-22 09:00:47,919 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 09:00:47,926 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L13-2true [2019-10-22 09:00:47,927 INFO L793 eck$LassoCheckResult]: Loop: 6#L13-2true assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 3#L17-2true assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 9#L17-3true main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 6#L13-2true [2019-10-22 09:00:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-10-22 09:00:47,941 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:47,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333499166] [2019-10-22 09:00:47,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:47,942 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:47,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:48,035 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:48,037 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2019-10-22 09:00:48,037 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:48,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805700986] [2019-10-22 09:00:48,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:48,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:48,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:48,057 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:48,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2019-10-22 09:00:48,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:48,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460913753] [2019-10-22 09:00:48,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:48,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:48,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:48,074 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:48,173 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:48,174 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:48,174 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:48,174 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:48,174 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:48,175 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:48,175 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:48,175 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:48,175 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2019-10-22 09:00:48,175 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:48,175 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:48,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:48,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:48,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:48,352 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:48,353 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:00:48,361 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:48,361 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:48,383 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:48,383 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:49,240 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:00:49,243 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:49,244 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:49,244 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:49,244 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:49,244 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:00:49,244 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:49,244 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:49,244 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:49,245 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2019-10-22 09:00:49,245 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:49,245 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:49,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:49,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:49,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:49,337 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:49,356 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:00:49,357 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:00:49,359 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:49,359 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:49,359 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:49,359 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:49,363 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:00:49,363 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:00:49,378 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:49,378 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:00:49,379 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:49,387 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:49,387 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:49,387 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:49,388 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:49,389 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:49,389 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:49,417 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:00:49,438 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:00:49,438 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:00:49,440 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:00:49,440 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:00:49,440 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:00:49,441 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2019-10-22 09:00:49,446 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:00:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:00:49,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:49,516 WARN L254 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:49,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:49,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:49,570 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-10-22 09:00:49,570 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 4 states. [2019-10-22 09:00:49,637 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states.. Second operand 4 states. Result 33 states and 49 transitions. Complement of second has 10 states. [2019-10-22 09:00:49,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-10-22 09:00:49,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 09:00:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 24 transitions. [2019-10-22 09:00:49,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 3 letters. [2019-10-22 09:00:49,642 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:49,642 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 4 letters. Loop has 3 letters. [2019-10-22 09:00:49,642 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:49,642 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 6 letters. [2019-10-22 09:00:49,643 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:49,643 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 49 transitions. [2019-10-22 09:00:49,646 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-10-22 09:00:49,650 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 11 states and 16 transitions. [2019-10-22 09:00:49,651 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-10-22 09:00:49,651 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-10-22 09:00:49,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2019-10-22 09:00:49,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:49,652 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-10-22 09:00:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2019-10-22 09:00:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-10-22 09:00:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-10-22 09:00:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2019-10-22 09:00:49,676 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2019-10-22 09:00:49,677 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2019-10-22 09:00:49,677 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-10-22 09:00:49,677 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 15 transitions. [2019-10-22 09:00:49,677 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-10-22 09:00:49,677 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:49,677 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:49,678 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-10-22 09:00:49,678 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-10-22 09:00:49,678 INFO L791 eck$LassoCheckResult]: Stem: 90#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 91#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 86#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 87#L17-2 [2019-10-22 09:00:49,678 INFO L793 eck$LassoCheckResult]: Loop: 87#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 87#L17-2 [2019-10-22 09:00:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:49,678 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2019-10-22 09:00:49,679 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:49,679 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053152013] [2019-10-22 09:00:49,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:49,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:49,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:49,691 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:49,691 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2019-10-22 09:00:49,692 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:49,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544810038] [2019-10-22 09:00:49,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:49,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:49,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:49,698 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:49,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:49,699 INFO L82 PathProgramCache]: Analyzing trace with hash 963530, now seen corresponding path program 2 times [2019-10-22 09:00:49,699 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:49,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451843559] [2019-10-22 09:00:49,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:49,700 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:49,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:49,711 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:49,724 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:49,724 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:49,724 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:49,724 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:49,724 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:49,725 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:49,725 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:49,725 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:49,725 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2019-10-22 09:00:49,725 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:49,725 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:49,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:49,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:49,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:49,774 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:49,774 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:49,784 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:49,784 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:49,790 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:49,790 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:00:49,797 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:49,797 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:49,801 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:49,801 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:00:49,808 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:49,808 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:00:49,823 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:49,823 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:49,931 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:00:49,936 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:49,937 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:49,937 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:49,937 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:49,937 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:00:49,937 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:49,937 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:49,937 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:49,937 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2019-10-22 09:00:49,937 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:49,937 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:49,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:49,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:49,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:49,996 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:49,997 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:00:49,997 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:00:49,998 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:49,998 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:49,998 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:49,998 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:50,000 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:00:50,000 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:00:50,004 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:50,005 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:00:50,005 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:50,005 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:50,006 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:50,006 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:50,007 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:00:50,008 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:00:50,014 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:50,014 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:00:50,015 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:50,015 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:50,015 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:50,015 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:50,015 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:50,016 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:50,016 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:50,021 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:00:50,025 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:00:50,026 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:00:50,026 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:00:50,026 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:00:50,026 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:00:50,027 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-10-22 09:00:50,027 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:00:50,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:00:50,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,049 WARN L254 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:00:50,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:50,050 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-10-22 09:00:50,050 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 15 transitions. cyclomatic complexity: 8 Second operand 2 states. [2019-10-22 09:00:50,062 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 15 transitions. cyclomatic complexity: 8. Second operand 2 states. Result 15 states and 22 transitions. Complement of second has 5 states. [2019-10-22 09:00:50,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-10-22 09:00:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-10-22 09:00:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-10-22 09:00:50,063 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 1 letters. [2019-10-22 09:00:50,064 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:50,064 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 1 letters. [2019-10-22 09:00:50,064 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:50,064 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 2 letters. [2019-10-22 09:00:50,065 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:50,065 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 22 transitions. [2019-10-22 09:00:50,065 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-10-22 09:00:50,066 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 13 states and 19 transitions. [2019-10-22 09:00:50,066 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-10-22 09:00:50,066 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-10-22 09:00:50,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-10-22 09:00:50,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:50,067 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-10-22 09:00:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-10-22 09:00:50,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2019-10-22 09:00:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-10-22 09:00:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2019-10-22 09:00:50,069 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2019-10-22 09:00:50,069 INFO L591 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2019-10-22 09:00:50,069 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-10-22 09:00:50,069 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 17 transitions. [2019-10-22 09:00:50,069 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-10-22 09:00:50,070 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:50,070 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:50,071 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-10-22 09:00:50,072 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 09:00:50,072 INFO L791 eck$LassoCheckResult]: Stem: 146#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 147#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 150#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 153#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 144#L17-3 [2019-10-22 09:00:50,072 INFO L793 eck$LassoCheckResult]: Loop: 144#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 148#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 143#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 144#L17-3 [2019-10-22 09:00:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:50,072 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 1 times [2019-10-22 09:00:50,072 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:50,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184003079] [2019-10-22 09:00:50,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:50,085 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:50,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:50,085 INFO L82 PathProgramCache]: Analyzing trace with hash 52221, now seen corresponding path program 2 times [2019-10-22 09:00:50,086 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:50,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896319412] [2019-10-22 09:00:50,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:50,094 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:50,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285994, now seen corresponding path program 1 times [2019-10-22 09:00:50,095 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:50,095 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772204473] [2019-10-22 09:00:50,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:50,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:50,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772204473] [2019-10-22 09:00:50,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811438050] [2019-10-22 09:00:50,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:50,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:00:50,196 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:50,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:50,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:50,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-10-22 09:00:50,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155951374] [2019-10-22 09:00:50,305 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:50,305 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:50,305 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:50,305 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:50,306 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:50,306 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:50,306 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:50,306 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:50,306 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2019-10-22 09:00:50,306 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:50,306 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:50,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:50,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:50,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:50,410 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:50,411 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:50,423 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:50,424 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:00:50,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:50,445 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:54,579 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:00:54,581 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:54,582 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:54,582 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:54,582 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:54,582 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:00:54,582 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:54,582 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:54,582 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:54,582 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2019-10-22 09:00:54,583 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:54,583 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:54,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:54,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:54,608 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:54,677 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:54,678 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:00:54,678 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:00:54,679 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:54,679 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:54,679 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:54,680 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:54,681 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:00:54,681 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:00:54,687 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:00:54,687 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:00:54,688 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:00:54,688 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:00:54,688 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:00:54,688 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:00:54,689 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:00:54,690 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:00:54,690 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:00:54,699 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:00:54,703 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:00:54,704 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:00:54,704 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:00:54,704 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:00:54,704 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:00:54,705 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-10-22 09:00:54,705 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:00:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:54,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:00:54,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:54,733 WARN L254 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 09:00:54,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:54,757 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-10-22 09:00:54,758 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-10-22 09:00:54,802 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 9. Second operand 4 states. Result 33 states and 52 transitions. Complement of second has 10 states. [2019-10-22 09:00:54,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-10-22 09:00:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 09:00:54,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2019-10-22 09:00:54,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 3 letters. [2019-10-22 09:00:54,804 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:54,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 7 letters. Loop has 3 letters. [2019-10-22 09:00:54,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:54,805 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 6 letters. [2019-10-22 09:00:54,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:00:54,805 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 52 transitions. [2019-10-22 09:00:54,807 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-10-22 09:00:54,808 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 24 states and 35 transitions. [2019-10-22 09:00:54,809 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-10-22 09:00:54,809 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-10-22 09:00:54,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2019-10-22 09:00:54,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:54,809 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2019-10-22 09:00:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2019-10-22 09:00:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-10-22 09:00:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 09:00:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2019-10-22 09:00:54,812 INFO L711 BuchiCegarLoop]: Abstraction has 22 states and 33 transitions. [2019-10-22 09:00:54,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:54,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:00:54,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:00:54,818 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand 9 states. [2019-10-22 09:00:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:54,982 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2019-10-22 09:00:54,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:00:54,983 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2019-10-22 09:00:54,984 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2019-10-22 09:00:54,984 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 26 transitions. [2019-10-22 09:00:54,984 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2019-10-22 09:00:54,985 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-10-22 09:00:54,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 26 transitions. [2019-10-22 09:00:54,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:00:54,985 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 26 transitions. [2019-10-22 09:00:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 26 transitions. [2019-10-22 09:00:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2019-10-22 09:00:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 09:00:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-10-22 09:00:54,988 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-10-22 09:00:54,988 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-10-22 09:00:54,988 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-10-22 09:00:54,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2019-10-22 09:00:54,989 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-10-22 09:00:54,989 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:00:54,989 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:00:54,990 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-10-22 09:00:54,990 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-10-22 09:00:54,990 INFO L791 eck$LassoCheckResult]: Stem: 322#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 323#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 326#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 325#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 321#L17-3 [2019-10-22 09:00:54,990 INFO L793 eck$LassoCheckResult]: Loop: 321#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 324#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 318#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 319#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 321#L17-3 [2019-10-22 09:00:54,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:54,991 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 2 times [2019-10-22 09:00:54,991 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:54,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997375342] [2019-10-22 09:00:54,992 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:54,992 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:54,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:55,002 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1618930, now seen corresponding path program 1 times [2019-10-22 09:00:55,003 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:55,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929356345] [2019-10-22 09:00:55,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:55,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:55,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:55,014 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:55,014 INFO L82 PathProgramCache]: Analyzing trace with hash 780807225, now seen corresponding path program 2 times [2019-10-22 09:00:55,015 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:55,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457097373] [2019-10-22 09:00:55,015 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:55,015 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:55,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:55,032 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:55,102 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:00:55,102 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:00:55,102 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:00:55,102 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:00:55,102 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:00:55,102 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:55,103 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:00:55,103 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:00:55,103 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2019-10-22 09:00:55,103 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:00:55,103 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:00:55,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:55,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:55,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:00:55,183 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:00:55,183 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:00:55,188 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:55,189 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:55,196 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:55,196 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:55,202 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:55,203 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:00:55,206 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:00:55,207 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_7=0} Honda state: {v_rep~unnamed0~0~false_7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:00:55,214 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:00:55,214 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 09:00:55,240 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:00:55,240 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:07,270 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-10-22 09:01:07,273 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:01:07,273 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:01:07,273 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:01:07,273 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:01:07,274 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:01:07,274 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:07,274 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:01:07,274 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:01:07,274 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2019-10-22 09:01:07,274 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:01:07,274 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:01:07,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:07,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:07,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:07,354 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:01:07,355 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:01:07,355 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:07,356 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:07,356 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:07,356 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:07,356 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:07,356 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:07,358 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:07,358 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:07,375 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:01:07,384 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:01:07,391 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:01:07,391 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:01:07,391 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:01:07,392 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:01:07,392 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-10-22 09:01:07,392 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:01:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:01:07,462 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-10-22 09:01:07,462 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-10-22 09:01:07,491 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 23 states and 32 transitions. Complement of second has 6 states. [2019-10-22 09:01:07,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-10-22 09:01:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-10-22 09:01:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-10-22 09:01:07,493 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2019-10-22 09:01:07,493 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:07,493 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 4 letters. [2019-10-22 09:01:07,494 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:07,494 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 8 letters. [2019-10-22 09:01:07,494 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:07,494 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 32 transitions. [2019-10-22 09:01:07,495 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-10-22 09:01:07,495 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 27 transitions. [2019-10-22 09:01:07,496 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2019-10-22 09:01:07,496 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-10-22 09:01:07,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 27 transitions. [2019-10-22 09:01:07,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 09:01:07,496 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 27 transitions. [2019-10-22 09:01:07,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 27 transitions. [2019-10-22 09:01:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2019-10-22 09:01:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-22 09:01:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2019-10-22 09:01:07,498 INFO L711 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-10-22 09:01:07,498 INFO L591 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-10-22 09:01:07,498 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-10-22 09:01:07,498 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2019-10-22 09:01:07,499 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-10-22 09:01:07,500 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 09:01:07,500 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 09:01:07,500 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-10-22 09:01:07,500 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-10-22 09:01:07,500 INFO L791 eck$LassoCheckResult]: Stem: 405#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 406#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 415#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 412#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 411#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 407#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 402#L17-2 [2019-10-22 09:01:07,501 INFO L793 eck$LassoCheckResult]: Loop: 402#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 402#L17-2 [2019-10-22 09:01:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,501 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 3 times [2019-10-22 09:01:07,501 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:07,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203971748] [2019-10-22 09:01:07,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:07,514 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,515 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2019-10-22 09:01:07,515 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:07,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120958089] [2019-10-22 09:01:07,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:07,520 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285992, now seen corresponding path program 4 times [2019-10-22 09:01:07,521 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:01:07,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690029189] [2019-10-22 09:01:07,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,522 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:01:07,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:01:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:01:07,534 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:01:07,560 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:01:07,560 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:01:07,560 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:01:07,560 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:01:07,561 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 09:01:07,561 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:07,561 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:01:07,561 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:01:07,561 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2019-10-22 09:01:07,561 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:01:07,561 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:01:07,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:07,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:07,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:07,608 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:01:07,609 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:07,613 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:07,613 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:07,616 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:07,616 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:07,621 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:07,621 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:07,625 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 09:01:07,625 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:07,630 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 09:01:07,630 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b2b3c4a2-2b55-486d-ae2e-540aab696adc/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:07,639 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 09:01:07,639 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 09:01:07,736 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 09:01:07,738 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 09:01:07,738 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 09:01:07,738 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 09:01:07,738 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 09:01:07,738 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 09:01:07,738 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 09:01:07,738 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 09:01:07,739 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 09:01:07,739 INFO L131 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2019-10-22 09:01:07,739 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 09:01:07,739 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 09:01:07,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:07,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:07,745 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 09:01:07,781 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 09:01:07,781 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 09:01:07,782 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:07,782 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:07,783 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:07,783 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:07,783 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:07,784 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:01:07,784 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:01:07,786 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:07,787 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:07,788 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:07,788 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:07,788 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:07,788 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:07,789 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-10-22 09:01:07,789 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-10-22 09:01:07,793 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 09:01:07,793 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-10-22 09:01:07,794 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 09:01:07,794 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 09:01:07,794 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 09:01:07,795 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 09:01:07,795 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 09:01:07,795 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 09:01:07,795 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 09:01:07,798 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 09:01:07,801 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 09:01:07,801 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 09:01:07,801 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 09:01:07,802 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 09:01:07,802 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 09:01:07,802 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-10-22 09:01:07,802 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 09:01:07,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,830 WARN L254 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:07,831 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-10-22 09:01:07,831 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-10-22 09:01:07,844 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9. Second operand 2 states. Result 20 states and 28 transitions. Complement of second has 5 states. [2019-10-22 09:01:07,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-10-22 09:01:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-10-22 09:01:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-10-22 09:01:07,845 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-10-22 09:01:07,845 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:07,845 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 09:01:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,866 WARN L254 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:07,867 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2019-10-22 09:01:07,867 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-10-22 09:01:07,875 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9. Second operand 2 states. Result 20 states and 28 transitions. Complement of second has 5 states. [2019-10-22 09:01:07,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-10-22 09:01:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-10-22 09:01:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-10-22 09:01:07,877 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-10-22 09:01:07,877 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:07,877 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 09:01:07,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:01:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:01:07,909 WARN L254 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 09:01:07,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:01:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:01:07,909 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2019-10-22 09:01:07,909 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-10-22 09:01:07,923 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9. Second operand 2 states. Result 22 states and 30 transitions. Complement of second has 4 states. [2019-10-22 09:01:07,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-10-22 09:01:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-10-22 09:01:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-10-22 09:01:07,927 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2019-10-22 09:01:07,927 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:07,927 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 1 letters. [2019-10-22 09:01:07,927 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:07,927 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 2 letters. [2019-10-22 09:01:07,928 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 09:01:07,928 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 30 transitions. [2019-10-22 09:01:07,928 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 09:01:07,928 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 0 states and 0 transitions. [2019-10-22 09:01:07,929 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-10-22 09:01:07,929 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-10-22 09:01:07,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-10-22 09:01:07,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 09:01:07,929 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:01:07,929 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:01:07,929 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:01:07,929 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-10-22 09:01:07,929 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:01:07,929 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 09:01:07,929 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-10-22 09:01:07,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.10 09:01:07 BoogieIcfgContainer [2019-10-22 09:01:07,936 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-10-22 09:01:07,936 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:01:07,936 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:01:07,937 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:01:07,937 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:47" (3/4) ... [2019-10-22 09:01:07,941 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 09:01:07,941 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:01:07,944 INFO L168 Benchmark]: Toolchain (without parser) took 20639.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 944.5 MB in the beginning and 996.2 MB in the end (delta: -51.6 MB). Peak memory consumption was 90.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:07,944 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:07,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -193.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:07,945 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.12 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:07,945 INFO L168 Benchmark]: Boogie Preprocessor took 14.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:01:07,946 INFO L168 Benchmark]: RCFGBuilder took 222.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:07,946 INFO L168 Benchmark]: BuchiAutomizer took 20119.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 117.5 MB). Peak memory consumption was 117.5 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:07,947 INFO L168 Benchmark]: Witness Printer took 4.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 996.2 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. [2019-10-22 09:01:07,950 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 242.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -193.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.12 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 222.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 20119.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 117.5 MB). Peak memory consumption was 117.5 MB. Max. memory is 11.5 GB. * Witness Printer took 4.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 996.2 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. 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 6 terminating modules (1 trivial, 4 deterministic, 1 nondeterministic). One deterministic module has affine ranking function y and consists of 6 locations. One deterministic module has affine ranking function xtmp and consists of 3 locations. One deterministic module has affine ranking function xtmp and consists of 6 locations. One deterministic module has affine ranking function xtmp and consists of 4 locations. One nondeterministic module has affine ranking function xtmp and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 9 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 20.0s and 6 iterations. TraceHistogramMax:2. Analysis of lassos took 19.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 14 states and ocurred in iteration 4. Nontrivial modules had stage [4, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 33 SDtfs, 45 SDslu, 9 SDs, 0 SdLazy, 102 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax165 hnf95 lsp58 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq166 hnf91 smp100 dnf100 smp100 tf108 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 21ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 1 LassoNonterminationAnalysisTime: 17.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...