./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/GCD4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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 0.1.24-678e011 [2019-11-20 00:54:02,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 00:54:02,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 00:54:02,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 00:54:02,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 00:54:02,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 00:54:02,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 00:54:02,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 00:54:02,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 00:54:02,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 00:54:02,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 00:54:02,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 00:54:02,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 00:54:02,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 00:54:02,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 00:54:02,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 00:54:02,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 00:54:02,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 00:54:02,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 00:54:02,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 00:54:02,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 00:54:02,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 00:54:02,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 00:54:02,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 00:54:02,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 00:54:02,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 00:54:02,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 00:54:02,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 00:54:02,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 00:54:02,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 00:54:02,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 00:54:02,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 00:54:02,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 00:54:02,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 00:54:02,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 00:54:02,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 00:54:02,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 00:54:02,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 00:54:02,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 00:54:02,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 00:54:02,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 00:54:02,447 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 00:54:02,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 00:54:02,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 00:54:02,474 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 00:54:02,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 00:54:02,475 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 00:54:02,475 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 00:54:02,475 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 00:54:02,475 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 00:54:02,475 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 00:54:02,475 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 00:54:02,476 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 00:54:02,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 00:54:02,476 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 00:54:02,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 00:54:02,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 00:54:02,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 00:54:02,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 00:54:02,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 00:54:02,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 00:54:02,477 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 00:54:02,478 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 00:54:02,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 00:54:02,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 00:54:02,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 00:54:02,478 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 00:54:02,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 00:54:02,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 00:54:02,479 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 00:54:02,480 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 00:54:02,480 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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 [2019-11-20 00:54:02,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 00:54:02,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 00:54:02,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 00:54:02,630 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 00:54:02,631 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 00:54:02,631 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/GCD4.c [2019-11-20 00:54:02,681 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/data/04ff88d37/ae918408c8cc43749eaa499ef3d456b9/FLAGfcadd2fb0 [2019-11-20 00:54:03,089 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 00:54:03,090 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/sv-benchmarks/c/termination-restricted-15/GCD4.c [2019-11-20 00:54:03,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/data/04ff88d37/ae918408c8cc43749eaa499ef3d456b9/FLAGfcadd2fb0 [2019-11-20 00:54:03,113 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/data/04ff88d37/ae918408c8cc43749eaa499ef3d456b9 [2019-11-20 00:54:03,116 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 00:54:03,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 00:54:03,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 00:54:03,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 00:54:03,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 00:54:03,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e36ea05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03, skipping insertion in model container [2019-11-20 00:54:03,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,134 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 00:54:03,151 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 00:54:03,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:54:03,306 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 00:54:03,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:54:03,396 INFO L192 MainTranslator]: Completed translation [2019-11-20 00:54:03,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03 WrapperNode [2019-11-20 00:54:03,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 00:54:03,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 00:54:03,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 00:54:03,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 00:54:03,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,434 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 00:54:03,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 00:54:03,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 00:54:03,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 00:54:03,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... [2019-11-20 00:54:03,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 00:54:03,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 00:54:03,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 00:54:03,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 00:54:03,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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 [2019-11-20 00:54:03,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 00:54:03,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 00:54:03,694 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 00:54:03,694 INFO L285 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-20 00:54:03,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:54:03 BoogieIcfgContainer [2019-11-20 00:54:03,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 00:54:03,696 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 00:54:03,696 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 00:54:03,699 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 00:54:03,700 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 00:54:03,701 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 12:54:03" (1/3) ... [2019-11-20 00:54:03,702 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4bc0de06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 12:54:03, skipping insertion in model container [2019-11-20 00:54:03,702 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 00:54:03,702 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:54:03" (2/3) ... [2019-11-20 00:54:03,702 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4bc0de06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 12:54:03, skipping insertion in model container [2019-11-20 00:54:03,703 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 00:54:03,703 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:54:03" (3/3) ... [2019-11-20 00:54:03,704 INFO L371 chiAutomizerObserver]: Analyzing ICFG GCD4.c [2019-11-20 00:54:03,746 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 00:54:03,746 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 00:54:03,746 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 00:54:03,746 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 00:54:03,746 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 00:54:03,747 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 00:54:03,747 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 00:54:03,747 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 00:54:03,759 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-20 00:54:03,778 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-20 00:54:03,779 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 00:54:03,779 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 00:54:03,785 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-20 00:54:03,785 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 00:54:03,785 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 00:54:03,785 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-20 00:54:03,786 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-20 00:54:03,786 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 00:54:03,787 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 00:54:03,787 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-20 00:54:03,787 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 00:54:03,794 INFO L794 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L13-2true [2019-11-20 00:54:03,795 INFO L796 eck$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 [2019-11-20 00:54:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:03,801 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-20 00:54:03,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:03,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28413304] [2019-11-20 00:54:03,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:03,891 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:03,892 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2019-11-20 00:54:03,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:03,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754222701] [2019-11-20 00:54:03,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:03,910 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:03,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:03,912 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2019-11-20 00:54:03,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:03,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165102839] [2019-11-20 00:54:03,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:03,926 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:04,068 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:04,070 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:04,070 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:04,070 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:04,070 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 00:54:04,070 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:04,071 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:04,071 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:04,071 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2019-11-20 00:54:04,071 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:04,071 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:04,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:04,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:04,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:04,263 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:04,263 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:04,268 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:04,268 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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 [2019-11-20 00:54:04,306 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 00:54:04,306 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 00:54:05,311 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 00:54:05,313 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:05,314 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:05,314 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:05,314 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:05,314 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 00:54:05,314 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:05,314 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:05,314 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:05,315 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration1_Loop [2019-11-20 00:54:05,315 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:05,315 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:05,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:05,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:05,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:05,480 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:05,486 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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) [2019-11-20 00:54:05,492 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:05,495 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:05,496 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:05,496 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:05,496 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:05,504 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 00:54:05,505 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:05,514 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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) [2019-11-20 00:54:05,536 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:05,539 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:05,540 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 00:54:05,540 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:05,541 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:05,541 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:05,548 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 00:54:05,549 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:05,558 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 00:54:05,569 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 00:54:05,569 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:05,584 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 00:54:05,584 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 00:54:05,584 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 00:54:05,585 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2019-11-20 00:54:05,590 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 00:54:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:05,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 00:54:05,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:05,644 WARN L253 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 00:54:05,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:05,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:54:05,720 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-20 00:54:05,722 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states. Second operand 4 states. [2019-11-20 00:54:05,833 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. [2019-11-20 00:54:05,834 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 [2019-11-20 00:54:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 00:54:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 24 transitions. [2019-11-20 00:54:05,839 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 3 letters. [2019-11-20 00:54:05,839 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:05,840 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 4 letters. Loop has 3 letters. [2019-11-20 00:54:05,840 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:05,840 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 24 transitions. Stem has 1 letters. Loop has 6 letters. [2019-11-20 00:54:05,840 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:05,841 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 49 transitions. [2019-11-20 00:54:05,845 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-11-20 00:54:05,850 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 11 states and 16 transitions. [2019-11-20 00:54:05,852 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-20 00:54:05,852 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-11-20 00:54:05,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2019-11-20 00:54:05,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 00:54:05,854 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-11-20 00:54:05,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2019-11-20 00:54:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2019-11-20 00:54:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-20 00:54:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2019-11-20 00:54:05,885 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2019-11-20 00:54:05,885 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 15 transitions. [2019-11-20 00:54:05,885 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 00:54:05,885 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 15 transitions. [2019-11-20 00:54:05,886 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-11-20 00:54:05,886 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 00:54:05,886 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 00:54:05,886 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-20 00:54:05,887 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-20 00:54:05,887 INFO L794 eck$LassoCheckResult]: Stem: 90#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 91#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 86#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 87#L17-2 [2019-11-20 00:54:05,887 INFO L796 eck$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 [2019-11-20 00:54:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:05,887 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2019-11-20 00:54:05,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:05,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608308934] [2019-11-20 00:54:05,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:05,903 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:05,904 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2019-11-20 00:54:05,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:05,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379035900] [2019-11-20 00:54:05,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:05,911 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:05,912 INFO L82 PathProgramCache]: Analyzing trace with hash 963530, now seen corresponding path program 2 times [2019-11-20 00:54:05,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:05,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401025076] [2019-11-20 00:54:05,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:05,928 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:05,949 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:05,949 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:05,949 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:05,950 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:05,950 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 00:54:05,950 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:05,950 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:05,950 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:05,950 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2019-11-20 00:54:05,951 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:05,951 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:05,952 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:05,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:05,960 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:06,039 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:06,040 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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) [2019-11-20 00:54:06,045 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:06,045 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 [2019-11-20 00:54:06,052 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 00:54:06,053 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/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 00:54:06,064 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:06,064 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:06,071 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 00:54:06,071 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/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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) [2019-11-20 00:54:06,087 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:06,087 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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) [2019-11-20 00:54:06,113 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 00:54:06,113 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:06,233 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 00:54:06,235 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:06,235 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:06,236 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:06,236 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:06,236 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 00:54:06,236 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:06,236 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:06,236 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:06,236 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration2_Loop [2019-11-20 00:54:06,236 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:06,236 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:06,237 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:06,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:06,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:06,322 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:06,322 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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) [2019-11-20 00:54:06,332 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:06,334 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:06,334 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:06,335 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:06,335 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:06,341 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 00:54:06,345 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:06,352 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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) [2019-11-20 00:54:06,369 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:06,372 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:06,372 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:06,372 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:06,372 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:06,380 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 00:54:06,381 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:06,386 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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 [2019-11-20 00:54:06,397 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:06,400 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:06,400 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 00:54:06,400 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:06,400 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:06,400 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:06,403 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 00:54:06,403 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 00:54:06,406 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 00:54:06,411 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-20 00:54:06,411 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:06,433 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 00:54:06,433 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 00:54:06,433 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 00:54:06,433 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-11-20 00:54:06,436 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 00:54:06,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:06,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 00:54:06,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:06,473 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 00:54:06,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:54:06,474 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 [2019-11-20 00:54:06,475 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 15 transitions. cyclomatic complexity: 8 Second operand 2 states. [2019-11-20 00:54:06,496 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. [2019-11-20 00:54:06,498 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 [2019-11-20 00:54:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-20 00:54:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-11-20 00:54:06,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 1 letters. [2019-11-20 00:54:06,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:06,500 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 1 letters. [2019-11-20 00:54:06,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:06,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-20 00:54:06,501 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:06,501 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 22 transitions. [2019-11-20 00:54:06,502 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-20 00:54:06,505 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 13 states and 19 transitions. [2019-11-20 00:54:06,505 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-11-20 00:54:06,505 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-11-20 00:54:06,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2019-11-20 00:54:06,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 00:54:06,506 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2019-11-20 00:54:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2019-11-20 00:54:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2019-11-20 00:54:06,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 00:54:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 17 transitions. [2019-11-20 00:54:06,512 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2019-11-20 00:54:06,512 INFO L591 BuchiCegarLoop]: Abstraction has 11 states and 17 transitions. [2019-11-20 00:54:06,512 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 00:54:06,513 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 17 transitions. [2019-11-20 00:54:06,515 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-20 00:54:06,516 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 00:54:06,516 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 00:54:06,518 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-20 00:54:06,518 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 00:54:06,519 INFO L794 eck$LassoCheckResult]: Stem: 146#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 147#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 150#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 153#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 144#L17-3 [2019-11-20 00:54:06,519 INFO L796 eck$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 [2019-11-20 00:54:06,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:06,519 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 1 times [2019-11-20 00:54:06,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:06,520 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352755668] [2019-11-20 00:54:06,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:06,540 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash 52221, now seen corresponding path program 2 times [2019-11-20 00:54:06,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:06,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090345268] [2019-11-20 00:54:06,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:06,550 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:06,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:06,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285994, now seen corresponding path program 1 times [2019-11-20 00:54:06,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:06,551 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083763711] [2019-11-20 00:54:06,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 00:54:06,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083763711] [2019-11-20 00:54:06,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899670857] [2019-11-20 00:54:06,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 00:54:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:06,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 00:54:06,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:06,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 00:54:06,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:54:06,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-20 00:54:06,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401382210] [2019-11-20 00:54:06,788 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:06,788 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:06,788 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:06,788 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:06,788 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 00:54:06,789 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:06,789 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:06,789 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:06,789 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2019-11-20 00:54:06,789 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:06,789 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:06,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:06,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:06,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:06,890 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:06,890 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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) [2019-11-20 00:54:06,900 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:06,900 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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) [2019-11-20 00:54:06,923 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 00:54:06,923 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:11,828 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 00:54:11,831 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:11,831 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:11,831 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:11,832 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:11,832 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 00:54:11,832 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:11,832 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:11,832 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:11,832 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration3_Loop [2019-11-20 00:54:11,832 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:11,832 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:11,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:11,839 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:11,862 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:11,933 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:11,934 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/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 [2019-11-20 00:54:11,949 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:11,951 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:11,951 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:11,951 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:11,952 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:11,954 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 00:54:11,955 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-20 00:54:11,963 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 19 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:11,975 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:11,981 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:11,981 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 00:54:11,982 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:11,982 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:11,982 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:11,985 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 00:54:11,985 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 00:54:11,989 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 00:54:11,995 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 00:54:11,995 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 00:54:12,007 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 00:54:12,008 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 00:54:12,008 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 00:54:12,008 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:12,011 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 00:54:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:12,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 00:54:12,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:12,055 WARN L253 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 00:54:12,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:54:12,084 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-20 00:54:12,084 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 11 states and 17 transitions. cyclomatic complexity: 9 Second operand 4 states. [2019-11-20 00:54:12,136 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. [2019-11-20 00:54:12,137 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 [2019-11-20 00:54:12,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 00:54:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2019-11-20 00:54:12,138 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 3 letters. [2019-11-20 00:54:12,138 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:12,138 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 7 letters. Loop has 3 letters. [2019-11-20 00:54:12,138 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:12,139 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 4 letters. Loop has 6 letters. [2019-11-20 00:54:12,139 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:12,139 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 52 transitions. [2019-11-20 00:54:12,141 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 4 [2019-11-20 00:54:12,142 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 24 states and 35 transitions. [2019-11-20 00:54:12,142 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-11-20 00:54:12,142 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2019-11-20 00:54:12,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 35 transitions. [2019-11-20 00:54:12,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 00:54:12,143 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 35 transitions. [2019-11-20 00:54:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 35 transitions. [2019-11-20 00:54:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-20 00:54:12,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-20 00:54:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2019-11-20 00:54:12,146 INFO L711 BuchiCegarLoop]: Abstraction has 22 states and 33 transitions. [2019-11-20 00:54:12,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 00:54:12,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 00:54:12,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-20 00:54:12,151 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand 9 states. [2019-11-20 00:54:12,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:54:12,349 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2019-11-20 00:54:12,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 00:54:12,350 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2019-11-20 00:54:12,352 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 5 [2019-11-20 00:54:12,352 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 26 transitions. [2019-11-20 00:54:12,352 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2019-11-20 00:54:12,353 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-20 00:54:12,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 26 transitions. [2019-11-20 00:54:12,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 00:54:12,353 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 26 transitions. [2019-11-20 00:54:12,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 26 transitions. [2019-11-20 00:54:12,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2019-11-20 00:54:12,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-20 00:54:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-20 00:54:12,355 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-20 00:54:12,355 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-20 00:54:12,355 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 00:54:12,356 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2019-11-20 00:54:12,356 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-20 00:54:12,356 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 00:54:12,356 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 00:54:12,357 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2019-11-20 00:54:12,357 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-20 00:54:12,357 INFO L794 eck$LassoCheckResult]: Stem: 322#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 323#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 326#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 325#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 321#L17-3 [2019-11-20 00:54:12,357 INFO L796 eck$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 [2019-11-20 00:54:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash 963528, now seen corresponding path program 2 times [2019-11-20 00:54:12,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:12,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620402503] [2019-11-20 00:54:12,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:12,369 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:12,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:12,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1618930, now seen corresponding path program 1 times [2019-11-20 00:54:12,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:12,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940615116] [2019-11-20 00:54:12,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:12,386 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:12,387 INFO L82 PathProgramCache]: Analyzing trace with hash 780807225, now seen corresponding path program 2 times [2019-11-20 00:54:12,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:12,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790621109] [2019-11-20 00:54:12,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:12,419 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-11-20 00:54:12,510 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:12,510 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:12,510 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:12,510 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:12,510 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 00:54:12,510 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:12,510 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:12,510 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:12,511 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2019-11-20 00:54:12,511 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:12,511 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:12,512 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:12,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:12,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:12,608 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:12,608 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 21 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:12,612 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:12,612 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 00:54:12,617 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 00:54:12,617 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/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 22 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:12,627 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:12,627 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 00:54:12,632 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 00:54:12,632 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/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 00:54:12,645 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:12,645 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 00:54:12,668 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 00:54:12,668 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:24,695 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2019-11-20 00:54:24,698 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:24,698 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:24,698 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:24,698 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:24,698 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 00:54:24,698 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:24,698 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:24,699 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:24,699 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration4_Loop [2019-11-20 00:54:24,699 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:24,699 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:24,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:24,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:24,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:24,771 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:24,771 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 25 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:24,776 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:24,778 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:24,778 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 00:54:24,778 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:24,779 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:24,779 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:24,781 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 00:54:24,781 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 00:54:24,787 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 00:54:24,791 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 00:54:24,791 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:24,794 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 00:54:24,794 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 00:54:24,794 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 00:54:24,794 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-11-20 00:54:24,796 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 00:54:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:24,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 00:54:24,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:24,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 00:54:24,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 00:54:24,849 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-20 00:54:24,850 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 6 Second operand 4 states. [2019-11-20 00:54:24,881 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. [2019-11-20 00:54:24,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 00:54:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 00:54:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2019-11-20 00:54:24,884 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2019-11-20 00:54:24,884 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:24,884 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 4 letters. [2019-11-20 00:54:24,884 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:24,884 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 4 letters. Loop has 8 letters. [2019-11-20 00:54:24,885 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:24,885 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 32 transitions. [2019-11-20 00:54:24,886 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-20 00:54:24,886 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 19 states and 27 transitions. [2019-11-20 00:54:24,886 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2019-11-20 00:54:24,886 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-11-20 00:54:24,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 27 transitions. [2019-11-20 00:54:24,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 00:54:24,887 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 27 transitions. [2019-11-20 00:54:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 27 transitions. [2019-11-20 00:54:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2019-11-20 00:54:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 00:54:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2019-11-20 00:54:24,889 INFO L711 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-20 00:54:24,889 INFO L591 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-20 00:54:24,889 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 00:54:24,889 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2019-11-20 00:54:24,889 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-20 00:54:24,890 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 00:54:24,890 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 00:54:24,891 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2019-11-20 00:54:24,891 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-20 00:54:24,891 INFO L794 eck$LassoCheckResult]: Stem: 405#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 406#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 415#L17-2 assume !!(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 412#L17-2 assume !(main_~xtmp~0 >= main_~y~0 && main_~y~0 > 0); 411#L17-3 main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 407#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 402#L17-2 [2019-11-20 00:54:24,891 INFO L796 eck$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 [2019-11-20 00:54:24,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:24,891 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 3 times [2019-11-20 00:54:24,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:24,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385700564] [2019-11-20 00:54:24,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:24,903 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:24,904 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2019-11-20 00:54:24,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:24,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782182745] [2019-11-20 00:54:24,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:24,908 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:24,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:24,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285992, now seen corresponding path program 4 times [2019-11-20 00:54:24,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 00:54:24,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933811689] [2019-11-20 00:54:24,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 00:54:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:54:24,922 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 00:54:24,942 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:24,942 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:24,942 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:24,942 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:24,943 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 00:54:24,943 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:24,943 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:24,943 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:24,943 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2019-11-20 00:54:24,943 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:24,943 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:24,944 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:24,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:24,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:25,000 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:25,000 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:25,006 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:25,006 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 00:54:25,010 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 00:54:25,010 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/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 28 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:25,014 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:25,014 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 00:54:25,018 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 00:54:25,018 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/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 29 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:25,023 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 00:54:25,023 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:25,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 00:54:25,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 00:54:25,120 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 00:54:25,121 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 00:54:25,122 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 00:54:25,122 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 00:54:25,122 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 00:54:25,122 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 00:54:25,122 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:25,122 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 00:54:25,122 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 00:54:25,122 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD4.c_Iteration5_Loop [2019-11-20 00:54:25,122 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 00:54:25,122 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 00:54:25,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:25,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:25,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 00:54:25,166 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 00:54:25,166 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:25,169 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:25,170 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:25,171 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:25,171 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:25,171 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:25,172 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 00:54:25,172 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-20 00:54:25,175 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 32 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:25,181 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:25,182 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:25,182 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:25,182 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:25,182 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:25,184 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 00:54:25,184 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-20 00:54:25,191 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 00:54:25,200 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 00:54:25,202 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 00:54:25,202 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 00:54:25,202 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 00:54:25,202 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 00:54:25,202 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 00:54:25,203 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 00:54:25,203 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:25,206 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 00:54:25,210 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-20 00:54:25,211 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d9b6062-1727-48f5-a640-bf48b0431b14/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 00:54:25,216 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 00:54:25,217 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 00:54:25,217 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 00:54:25,217 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2019-11-20 00:54:25,227 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 00:54:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:25,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 00:54:25,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:25,256 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 00:54:25,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:54:25,257 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 [2019-11-20 00:54:25,257 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-11-20 00:54:25,272 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. [2019-11-20 00:54:25,273 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 [2019-11-20 00:54:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-20 00:54:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-20 00:54:25,273 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-11-20 00:54:25,273 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:25,273 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 00:54:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:25,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 00:54:25,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:25,304 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 00:54:25,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:54:25,305 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 [2019-11-20 00:54:25,305 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-11-20 00:54:25,314 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. [2019-11-20 00:54:25,315 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 [2019-11-20 00:54:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-20 00:54:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-20 00:54:25,315 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 6 letters. Loop has 1 letters. [2019-11-20 00:54:25,315 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:25,315 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 00:54:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:25,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 00:54:25,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:25,338 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 00:54:25,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:54:25,339 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 [2019-11-20 00:54:25,339 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 20 transitions. cyclomatic complexity: 9 Second operand 2 states. [2019-11-20 00:54:25,359 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. [2019-11-20 00:54:25,360 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 [2019-11-20 00:54:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-20 00:54:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-11-20 00:54:25,361 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 1 letters. [2019-11-20 00:54:25,361 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:25,361 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 1 letters. [2019-11-20 00:54:25,362 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:25,362 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-20 00:54:25,362 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 00:54:25,362 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 30 transitions. [2019-11-20 00:54:25,363 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 00:54:25,363 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 0 states and 0 transitions. [2019-11-20 00:54:25,363 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 00:54:25,364 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 00:54:25,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 00:54:25,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 00:54:25,364 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 00:54:25,364 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 00:54:25,364 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 00:54:25,364 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-20 00:54:25,364 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 00:54:25,365 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 00:54:25,365 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 00:54:25,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 12:54:25 BoogieIcfgContainer [2019-11-20 00:54:25,371 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 00:54:25,371 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 00:54:25,371 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 00:54:25,371 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 00:54:25,372 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:54:03" (3/4) ... [2019-11-20 00:54:25,375 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 00:54:25,376 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 00:54:25,378 INFO L168 Benchmark]: Toolchain (without parser) took 22259.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.9 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -82.7 MB). Peak memory consumption was 110.3 MB. Max. memory is 11.5 GB. [2019-11-20 00:54:25,378 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:54:25,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -164.1 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-11-20 00:54:25,380 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:54:25,380 INFO L168 Benchmark]: Boogie Preprocessor took 19.38 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:54:25,381 INFO L168 Benchmark]: RCFGBuilder took 241.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. [2019-11-20 00:54:25,381 INFO L168 Benchmark]: BuchiAutomizer took 21674.46 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.6 MB). Peak memory consumption was 138.7 MB. Max. memory is 11.5 GB. [2019-11-20 00:54:25,382 INFO L168 Benchmark]: Witness Printer took 4.66 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:54:25,385 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 277.07 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -164.1 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.38 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 241.54 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 21674.46 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 78.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.6 MB). Peak memory consumption was 138.7 MB. Max. memory is 11.5 GB. * Witness Printer took 4.66 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 21.6s and 6 iterations. TraceHistogramMax:2. Analysis of lassos took 20.6s. Construction of modules took 0.1s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 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: 27ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 1 LassoNonterminationAnalysisTime: 18.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...