./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/GCD3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/GCD3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 aae625cda61f26fa063b78c3d3a58aff5ded8a89 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 19:09:25,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:09:25,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:09:25,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:09:25,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:09:25,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:09:25,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:09:25,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:09:25,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:09:25,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:09:25,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:09:25,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:09:25,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:09:25,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:09:25,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:09:25,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:09:25,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:09:25,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:09:25,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:09:25,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:09:25,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:09:25,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:09:25,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:09:25,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:09:25,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:09:25,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:09:25,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:09:25,950 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:09:25,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:09:25,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:09:25,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:09:25,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:09:25,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:09:25,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:09:25,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:09:25,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:09:25,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:09:25,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:09:25,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:09:25,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:09:25,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:09:25,969 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 19:09:26,021 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:09:26,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:09:26,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:09:26,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:09:26,024 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:09:26,025 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 19:09:26,025 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 19:09:26,025 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 19:09:26,026 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 19:09:26,026 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 19:09:26,027 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 19:09:26,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:09:26,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 19:09:26,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:09:26,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:09:26,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 19:09:26,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 19:09:26,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 19:09:26,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:09:26,029 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 19:09:26,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:09:26,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 19:09:26,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:09:26,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:09:26,031 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 19:09:26,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:09:26,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:09:26,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:09:26,032 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 19:09:26,033 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 19:09:26,033 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aae625cda61f26fa063b78c3d3a58aff5ded8a89 [2020-11-29 19:09:26,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:09:26,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:09:26,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:09:26,403 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:09:26,404 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:09:26,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/GCD3.c [2020-11-29 19:09:26,521 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/data/b9cbb20bb/a47f2db29f064f13a5c0776105f0ffec/FLAG98aa914db [2020-11-29 19:09:27,018 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:09:27,018 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/sv-benchmarks/c/termination-restricted-15/GCD3.c [2020-11-29 19:09:27,025 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/data/b9cbb20bb/a47f2db29f064f13a5c0776105f0ffec/FLAG98aa914db [2020-11-29 19:09:27,399 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/data/b9cbb20bb/a47f2db29f064f13a5c0776105f0ffec [2020-11-29 19:09:27,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:09:27,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:09:27,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:09:27,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:09:27,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:09:27,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acafdc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27, skipping insertion in model container [2020-11-29 19:09:27,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:09:27,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:09:27,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:09:27,605 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:09:27,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:09:27,662 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:09:27,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27 WrapperNode [2020-11-29 19:09:27,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:09:27,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:09:27,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:09:27,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:09:27,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,679 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:09:27,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:09:27,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:09:27,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:09:27,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... [2020-11-29 19:09:27,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:09:27,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:09:27,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:09:27,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:09:27,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:27,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:09:27,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:09:28,042 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:09:28,043 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-29 19:09:28,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:09:28 BoogieIcfgContainer [2020-11-29 19:09:28,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:09:28,048 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 19:09:28,048 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 19:09:28,064 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 19:09:28,065 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:09:28,066 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 07:09:27" (1/3) ... [2020-11-29 19:09:28,067 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27ee0209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:09:28, skipping insertion in model container [2020-11-29 19:09:28,067 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:09:28,068 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:09:27" (2/3) ... [2020-11-29 19:09:28,068 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27ee0209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 07:09:28, skipping insertion in model container [2020-11-29 19:09:28,068 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 19:09:28,068 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:09:28" (3/3) ... [2020-11-29 19:09:28,070 INFO L373 chiAutomizerObserver]: Analyzing ICFG GCD3.c [2020-11-29 19:09:28,147 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 19:09:28,147 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 19:09:28,147 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 19:09:28,148 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:09:28,148 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:09:28,148 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 19:09:28,148 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:09:28,148 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 19:09:28,182 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-29 19:09:28,203 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 19:09:28,204 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:09:28,204 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:09:28,210 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:09:28,210 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:09:28,210 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 19:09:28,210 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-29 19:09:28,212 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 19:09:28,212 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:09:28,212 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:09:28,213 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:09:28,213 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:09:28,219 INFO L794 eck$LassoCheckResult]: Stem: 10#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; 11#L13-2true [2020-11-29 19:09:28,219 INFO L796 eck$LassoCheckResult]: Loop: 11#L13-2true assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 3#L17true assume 0 == main_~y~0;main_~y~0 := main_~y~0; 7#L21-2true assume !(main_~xtmp~0 > 0); 5#L31-2true assume !true; 4#L31-3true main_~y~0 := main_~xtmp~0; 15#L25-1true main_~x~0 := main_~tmp~0; 11#L13-2true [2020-11-29 19:09:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:28,226 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 19:09:28,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:28,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054335432] [2020-11-29 19:09:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,304 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,309 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,327 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1187012529, now seen corresponding path program 1 times [2020-11-29 19:09:28,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:28,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109063986] [2020-11-29 19:09:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:28,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109063986] [2020-11-29 19:09:28,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:09:28,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:09:28,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416309551] [2020-11-29 19:09:28,446 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:09:28,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:28,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:09:28,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:28,481 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-11-29 19:09:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:28,543 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2020-11-29 19:09:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:09:28,546 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 17 transitions. [2020-11-29 19:09:28,548 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 19:09:28,552 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 10 states and 13 transitions. [2020-11-29 19:09:28,554 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2020-11-29 19:09:28,555 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-29 19:09:28,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2020-11-29 19:09:28,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:09:28,557 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-29 19:09:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2020-11-29 19:09:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-29 19:09:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 19:09:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2020-11-29 19:09:28,591 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-29 19:09:28,591 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-29 19:09:28,591 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 19:09:28,591 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2020-11-29 19:09:28,594 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 19:09:28,595 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:09:28,595 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:09:28,596 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:09:28,596 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:28,596 INFO L794 eck$LassoCheckResult]: Stem: 39#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 40#L13-2 [2020-11-29 19:09:28,597 INFO L796 eck$LassoCheckResult]: Loop: 40#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 41#L17 assume !(0 == main_~y~0); 37#L21 assume !(main_~y~0 < 0); 38#L21-2 assume !(main_~xtmp~0 > 0); 45#L31-2 assume !(main_~xtmp~0 < 0); 42#L31-3 main_~y~0 := main_~xtmp~0; 43#L25-1 main_~x~0 := main_~tmp~0; 40#L13-2 [2020-11-29 19:09:28,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-11-29 19:09:28,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:28,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396675643] [2020-11-29 19:09:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,623 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,634 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:28,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1817939337, now seen corresponding path program 1 times [2020-11-29 19:09:28,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:28,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665823395] [2020-11-29 19:09:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:28,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665823395] [2020-11-29 19:09:28,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:09:28,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:09:28,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896855906] [2020-11-29 19:09:28,691 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 19:09:28,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:28,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 19:09:28,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 19:09:28,693 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-11-29 19:09:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:28,734 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2020-11-29 19:09:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:09:28,735 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 14 transitions. [2020-11-29 19:09:28,736 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-11-29 19:09:28,737 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 14 transitions. [2020-11-29 19:09:28,737 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2020-11-29 19:09:28,737 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-11-29 19:09:28,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 14 transitions. [2020-11-29 19:09:28,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:09:28,738 INFO L691 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-29 19:09:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 14 transitions. [2020-11-29 19:09:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 8. [2020-11-29 19:09:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 19:09:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-11-29 19:09:28,740 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-29 19:09:28,740 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-29 19:09:28,745 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 19:09:28,745 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2020-11-29 19:09:28,746 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 19:09:28,747 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:09:28,749 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:09:28,749 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 19:09:28,750 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:28,750 INFO L794 eck$LassoCheckResult]: Stem: 67#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; 68#L13-2 [2020-11-29 19:09:28,751 INFO L796 eck$LassoCheckResult]: Loop: 68#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 69#L17 assume !(0 == main_~y~0); 65#L21 assume !(main_~y~0 < 0); 66#L21-2 assume main_~xtmp~0 > 0; 72#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 70#L26-3 main_~y~0 := main_~xtmp~0; 71#L25-1 main_~x~0 := main_~tmp~0; 68#L13-2 [2020-11-29 19:09:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2020-11-29 19:09:28,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:28,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550700406] [2020-11-29 19:09:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,762 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,768 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,771 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:28,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:28,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1818401082, now seen corresponding path program 1 times [2020-11-29 19:09:28,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:28,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274774090] [2020-11-29 19:09:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,798 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,828 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,830 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:28,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:28,831 INFO L82 PathProgramCache]: Analyzing trace with hash 669111751, now seen corresponding path program 1 times [2020-11-29 19:09:28,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:28,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467469956] [2020-11-29 19:09:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,846 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:28,855 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:28,864 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:28,985 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:28,987 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:28,988 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:28,988 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:28,988 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:09:28,988 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:28,988 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:28,989 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:28,989 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration3_Loop [2020-11-29 19:09:28,989 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:28,989 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:29,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:29,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:29,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:29,210 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:29,211 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:29,224 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:29,225 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:29,237 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:09:29,237 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:29,289 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:29,289 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:29,295 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:09:29,295 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:29,342 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:29,343 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:29,404 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:09:29,404 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:09:36,500 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:09:36,503 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:36,503 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:36,503 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:36,503 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:36,504 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:09:36,504 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:36,504 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:36,504 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:36,504 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration3_Loop [2020-11-29 19:09:36,504 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:36,505 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:36,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:36,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:36,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:36,710 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:36,715 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:36,728 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 [2020-11-29 19:09:36,730 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:36,731 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:36,731 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:36,731 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:36,739 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:09:36,740 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:36,749 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:36,797 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 [2020-11-29 19:09:36,800 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:36,800 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:36,800 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:36,800 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:36,807 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:09:36,810 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:09:36,818 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:36,870 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 [2020-11-29 19:09:36,872 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:36,873 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:09:36,873 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:36,873 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:36,873 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:36,883 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:09:36,883 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:36,890 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:09:36,897 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:09:36,898 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_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:36,913 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:09:36,913 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:09:36,913 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:09:36,914 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:36,958 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:09:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:37,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:09:37,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:37,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:09:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:37,125 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2020-11-29 19:09:37,125 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-11-29 19:09:37,275 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 9 transitions. cyclomatic complexity: 2. Second operand 6 states. Result 27 states and 32 transitions. Complement of second has 9 states. [2020-11-29 19:09:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 19:09:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 19:09:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2020-11-29 19:09:37,279 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 7 letters. [2020-11-29 19:09:37,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:37,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 8 letters. Loop has 7 letters. [2020-11-29 19:09:37,281 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:37,281 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 14 letters. [2020-11-29 19:09:37,281 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:37,282 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 32 transitions. [2020-11-29 19:09:37,284 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-29 19:09:37,285 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 24 states and 28 transitions. [2020-11-29 19:09:37,285 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-11-29 19:09:37,286 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-29 19:09:37,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 28 transitions. [2020-11-29 19:09:37,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:09:37,286 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-29 19:09:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 28 transitions. [2020-11-29 19:09:37,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-11-29 19:09:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-29 19:09:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-29 19:09:37,290 INFO L714 BuchiCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-29 19:09:37,290 INFO L594 BuchiCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-29 19:09:37,290 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 19:09:37,290 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 24 transitions. [2020-11-29 19:09:37,291 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 19:09:37,292 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:09:37,292 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:09:37,292 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-11-29 19:09:37,293 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 19:09:37,293 INFO L794 eck$LassoCheckResult]: Stem: 158#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; 159#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 161#L17 assume !(0 == main_~y~0); 174#L21 assume !(main_~y~0 < 0); 173#L21-2 assume main_~xtmp~0 > 0; 169#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 170#L26-2 [2020-11-29 19:09:37,293 INFO L796 eck$LassoCheckResult]: Loop: 170#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 170#L26-2 [2020-11-29 19:09:37,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:37,294 INFO L82 PathProgramCache]: Analyzing trace with hash 925834904, now seen corresponding path program 1 times [2020-11-29 19:09:37,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:37,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873524687] [2020-11-29 19:09:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:37,303 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:37,310 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:37,312 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:37,313 INFO L82 PathProgramCache]: Analyzing trace with hash 64, now seen corresponding path program 1 times [2020-11-29 19:09:37,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:37,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110632011] [2020-11-29 19:09:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:37,318 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:37,321 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:37,322 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:37,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1363889015, now seen corresponding path program 2 times [2020-11-29 19:09:37,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:37,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978781987] [2020-11-29 19:09:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:37,332 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:37,343 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:37,346 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:37,441 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:37,442 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:37,442 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:37,442 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:37,442 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:09:37,442 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:37,442 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:37,442 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:37,442 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration4_Lasso [2020-11-29 19:09:37,443 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:37,443 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:37,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:37,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:37,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:37,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:37,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:37,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:37,612 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:37,613 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:37,620 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:37,620 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 [2020-11-29 19:09:37,626 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:09:37,626 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_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:37,680 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:37,680 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:37,685 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:09:37,685 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet0=0} Honda state: {ULTIMATE.start_main_#t~nondet0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:37,732 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:37,732 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:37,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:09:37,790 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:37,984 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:09:37,986 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:37,986 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:37,986 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:37,987 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:37,987 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:09:37,987 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:37,987 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:37,987 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:37,987 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration4_Lasso [2020-11-29 19:09:37,987 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:37,987 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:37,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:38,008 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:38,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:38,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:38,077 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:38,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:38,199 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:38,199 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:38,206 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 [2020-11-29 19:09:38,208 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:38,208 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:38,209 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:38,209 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:38,217 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:09:38,217 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:38,230 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:09:38,283 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 [2020-11-29 19:09:38,285 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:38,286 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:38,286 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:38,286 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:38,296 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:09:38,297 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:38,314 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:09:38,329 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-29 19:09:38,329 INFO L444 ModelExtractionUtils]: 9 out of 16 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:38,336 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:38,339 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 2. [2020-11-29 19:09:38,340 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:09:38,340 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 2*ULTIMATE.start_main_~xtmp~0 + 1 Supporting invariants [1*ULTIMATE.start_main_~y~0 - 1 >= 0, 1*ULTIMATE.start_main_~xtmp~0 >= 0] [2020-11-29 19:09:38,374 INFO L297 tatePredicateManager]: 1 out of 2 supporting invariants were superfluous and have been removed [2020-11-29 19:09:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:38,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:09:38,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:38,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:09:38,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:38,469 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2020-11-29 19:09:38,469 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 24 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-11-29 19:09:38,591 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 24 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 25 states and 31 transitions. Complement of second has 6 states. [2020-11-29 19:09:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:09:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 19:09:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-29 19:09:38,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 1 letters. [2020-11-29 19:09:38,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:38,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 1 letters. [2020-11-29 19:09:38,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:38,594 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2020-11-29 19:09:38,594 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:38,594 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2020-11-29 19:09:38,596 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 19:09:38,596 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 29 transitions. [2020-11-29 19:09:38,597 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-11-29 19:09:38,597 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-11-29 19:09:38,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 29 transitions. [2020-11-29 19:09:38,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:09:38,597 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-11-29 19:09:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 29 transitions. [2020-11-29 19:09:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-11-29 19:09:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 19:09:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-11-29 19:09:38,604 INFO L714 BuchiCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-11-29 19:09:38,604 INFO L594 BuchiCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-11-29 19:09:38,604 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 19:09:38,604 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 28 transitions. [2020-11-29 19:09:38,607 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-29 19:09:38,608 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:09:38,608 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:09:38,609 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:38,610 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:38,611 INFO L794 eck$LassoCheckResult]: Stem: 260#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; 261#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 275#L17 assume !(0 == main_~y~0); 278#L21 assume !(main_~y~0 < 0); 277#L21-2 assume main_~xtmp~0 > 0; 276#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 274#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 266#L26-3 [2020-11-29 19:09:38,611 INFO L796 eck$LassoCheckResult]: Loop: 266#L26-3 main_~y~0 := main_~xtmp~0; 267#L25-1 main_~x~0 := main_~tmp~0; 262#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 263#L17 assume !(0 == main_~y~0); 256#L21 assume !(main_~y~0 < 0); 257#L21-2 assume main_~xtmp~0 > 0; 270#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 266#L26-3 [2020-11-29 19:09:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:38,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1363889017, now seen corresponding path program 1 times [2020-11-29 19:09:38,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:38,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487678536] [2020-11-29 19:09:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:38,631 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:38,640 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:38,645 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1776384388, now seen corresponding path program 2 times [2020-11-29 19:09:38,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:38,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205364644] [2020-11-29 19:09:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:38,668 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:38,677 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:38,679 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:38,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:38,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1008190014, now seen corresponding path program 1 times [2020-11-29 19:09:38,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:38,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119604119] [2020-11-29 19:09:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:09:38,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119604119] [2020-11-29 19:09:38,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348884649] [2020-11-29 19:09:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 19:09:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:09:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 19:09:38,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:09:38,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 19:09:38,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 19:09:38,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404172121] [2020-11-29 19:09:38,949 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:38,949 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:38,949 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:38,949 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:38,949 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:09:38,950 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:38,950 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:38,950 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:38,950 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration5_Loop [2020-11-29 19:09:38,950 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:38,950 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:38,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:38,957 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:38,978 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:39,078 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:39,078 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:39,109 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:39,109 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:09:39,114 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:09:39,114 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:39,143 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:39,143 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:39,177 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:09:39,177 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:09:41,647 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:09:41,650 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:41,650 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:41,650 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:41,650 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:41,650 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:09:41,650 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:41,650 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:41,650 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:41,650 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration5_Loop [2020-11-29 19:09:41,650 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:41,650 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:41,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:41,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:41,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:41,771 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:41,771 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:41,791 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 [2020-11-29 19:09:41,793 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:41,793 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:41,793 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:41,793 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:41,799 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:09:41,799 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:41,804 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:41,834 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 [2020-11-29 19:09:41,836 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:41,836 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:09:41,836 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:41,836 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:41,836 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:41,840 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:09:41,840 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:09:41,845 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:09:41,853 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:09:41,853 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_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:41,856 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:09:41,856 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:09:41,856 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:09:41,856 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2020-11-29 19:09:41,880 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:09:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:41,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:09:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:09:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:41,999 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 [2020-11-29 19:09:41,999 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 28 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-11-29 19:09:42,105 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 28 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 58 states and 72 transitions. Complement of second has 8 states. [2020-11-29 19:09:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 19:09:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 19:09:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2020-11-29 19:09:42,107 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 7 letters. Loop has 7 letters. [2020-11-29 19:09:42,107 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:42,107 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 7 letters. [2020-11-29 19:09:42,107 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:42,107 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 7 letters. Loop has 14 letters. [2020-11-29 19:09:42,108 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:42,108 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 58 states and 72 transitions. [2020-11-29 19:09:42,111 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 19:09:42,113 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 58 states to 53 states and 67 transitions. [2020-11-29 19:09:42,113 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2020-11-29 19:09:42,113 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-11-29 19:09:42,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 67 transitions. [2020-11-29 19:09:42,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:09:42,114 INFO L691 BuchiCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-11-29 19:09:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states and 67 transitions. [2020-11-29 19:09:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-11-29 19:09:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 19:09:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-11-29 19:09:42,120 INFO L714 BuchiCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-11-29 19:09:42,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:09:42,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 19:09:42,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-29 19:09:42,121 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 8 states. [2020-11-29 19:09:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:09:42,331 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-11-29 19:09:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 19:09:42,331 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 60 transitions. [2020-11-29 19:09:42,333 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 19:09:42,334 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 31 states and 37 transitions. [2020-11-29 19:09:42,334 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2020-11-29 19:09:42,335 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 29 [2020-11-29 19:09:42,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 37 transitions. [2020-11-29 19:09:42,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:09:42,335 INFO L691 BuchiCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-11-29 19:09:42,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 37 transitions. [2020-11-29 19:09:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-29 19:09:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 19:09:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-29 19:09:42,338 INFO L714 BuchiCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-29 19:09:42,338 INFO L594 BuchiCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-29 19:09:42,338 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 19:09:42,338 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 27 transitions. [2020-11-29 19:09:42,339 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 19:09:42,339 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:09:42,340 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:09:42,340 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:42,340 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:09:42,340 INFO L794 eck$LassoCheckResult]: Stem: 563#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; 564#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 580#L17 assume !(0 == main_~y~0); 579#L21 assume !(main_~y~0 < 0); 578#L21-2 assume main_~xtmp~0 > 0; 577#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 576#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 567#L26-3 [2020-11-29 19:09:42,341 INFO L796 eck$LassoCheckResult]: Loop: 567#L26-3 main_~y~0 := main_~xtmp~0; 568#L25-1 main_~x~0 := main_~tmp~0; 565#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 566#L17 assume !(0 == main_~y~0); 561#L21 assume !(main_~y~0 < 0); 562#L21-2 assume main_~xtmp~0 > 0; 569#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 570#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 567#L26-3 [2020-11-29 19:09:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1363889017, now seen corresponding path program 2 times [2020-11-29 19:09:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:42,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534403383] [2020-11-29 19:09:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:42,348 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:42,353 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:42,354 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:42,355 INFO L82 PathProgramCache]: Analyzing trace with hash -766658727, now seen corresponding path program 1 times [2020-11-29 19:09:42,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:42,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383811419] [2020-11-29 19:09:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:42,361 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:42,366 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:42,367 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1189119455, now seen corresponding path program 2 times [2020-11-29 19:09:42,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:42,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448608870] [2020-11-29 19:09:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:42,383 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:42,410 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:42,413 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:42,495 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:42,495 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:42,495 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:42,495 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:42,495 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:09:42,496 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:42,496 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:42,496 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:42,496 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration6_Loop [2020-11-29 19:09:42,496 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:42,496 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:42,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:42,520 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:42,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:42,597 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:42,597 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:42,609 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:42,609 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:42,643 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:09:42,643 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:09:50,441 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:09:50,444 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:50,444 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:50,444 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:50,444 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:50,444 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:09:50,444 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:50,444 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:50,444 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:50,444 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration6_Loop [2020-11-29 19:09:50,444 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:50,444 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:50,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:50,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:50,480 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:50,581 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:50,581 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:50,584 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 [2020-11-29 19:09:50,586 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:50,586 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:09:50,586 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:50,586 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:50,586 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:50,592 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:09:50,592 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:09:50,595 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:09:50,600 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 19:09:50,600 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_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) [2020-11-29 19:09:50,603 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 19:09:50,603 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 19:09:50,603 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:09:50,603 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:50,627 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 19:09:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 19:09:50,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:50,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:09:50,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 19:09:50,732 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 [2020-11-29 19:09:50,732 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-29 19:09:50,789 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 27 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 45 states and 54 transitions. Complement of second has 6 states. [2020-11-29 19:09:50,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 19:09:50,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 19:09:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2020-11-29 19:09:50,790 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 8 letters. [2020-11-29 19:09:50,791 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:50,791 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 15 letters. Loop has 8 letters. [2020-11-29 19:09:50,791 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:50,792 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 16 letters. [2020-11-29 19:09:50,792 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:50,792 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 54 transitions. [2020-11-29 19:09:50,794 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:09:50,795 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 37 states and 45 transitions. [2020-11-29 19:09:50,795 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2020-11-29 19:09:50,795 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-11-29 19:09:50,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 45 transitions. [2020-11-29 19:09:50,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 19:09:50,795 INFO L691 BuchiCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-11-29 19:09:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 45 transitions. [2020-11-29 19:09:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-11-29 19:09:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 19:09:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-29 19:09:50,799 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-29 19:09:50,799 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-29 19:09:50,799 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 19:09:50,799 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2020-11-29 19:09:50,800 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 19:09:50,800 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 19:09:50,800 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 19:09:50,801 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 19:09:50,801 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 19:09:50,801 INFO L794 eck$LassoCheckResult]: Stem: 703#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; 704#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 722#L17 assume !(0 == main_~y~0); 721#L21 assume !(main_~y~0 < 0); 720#L21-2 assume main_~xtmp~0 > 0; 719#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 718#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 716#L26-3 main_~y~0 := main_~xtmp~0; 712#L25-1 main_~x~0 := main_~tmp~0; 705#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 706#L17 assume !(0 == main_~y~0); 699#L21 assume !(main_~y~0 < 0); 700#L21-2 assume main_~xtmp~0 > 0; 713#L26-2 [2020-11-29 19:09:50,801 INFO L796 eck$LassoCheckResult]: Loop: 713#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 713#L26-2 [2020-11-29 19:09:50,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:50,802 INFO L82 PathProgramCache]: Analyzing trace with hash -521667071, now seen corresponding path program 3 times [2020-11-29 19:09:50,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:50,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112486907] [2020-11-29 19:09:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:50,811 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:50,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:50,818 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:50,820 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:50,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:50,821 INFO L82 PathProgramCache]: Analyzing trace with hash 64, now seen corresponding path program 2 times [2020-11-29 19:09:50,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:50,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16120133] [2020-11-29 19:09:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:50,825 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:50,826 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:50,827 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:50,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:50,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1008190016, now seen corresponding path program 4 times [2020-11-29 19:09:50,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:09:50,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232014776] [2020-11-29 19:09:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:09:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:50,837 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:09:50,850 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:09:50,853 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:09:51,018 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-11-29 19:09:51,037 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:51,038 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:51,038 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:51,038 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:51,038 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 19:09:51,038 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:51,038 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:51,038 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:51,038 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration7_Lasso [2020-11-29 19:09:51,038 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:51,038 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:51,040 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,153 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:51,153 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:51,156 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:51,157 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:09:51,159 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 19:09:51,159 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:51,191 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 19:09:51,191 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:51,220 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 19:09:51,220 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 19:09:51,386 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 19:09:51,388 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 19:09:51,388 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 19:09:51,389 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 19:09:51,389 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 19:09:51,389 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 19:09:51,389 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:51,389 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 19:09:51,389 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 19:09:51,389 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration7_Lasso [2020-11-29 19:09:51,389 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 19:09:51,389 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 19:09:51,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 19:09:51,520 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 19:09:51,520 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:51,523 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 [2020-11-29 19:09:51,525 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:51,525 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:09:51,525 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:51,525 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:51,525 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:51,526 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:09:51,526 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:09:51,527 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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 [2020-11-29 19:09:51,553 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 [2020-11-29 19:09:51,555 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:51,555 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:09:51,555 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:51,555 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:51,555 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:51,556 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:09:51,556 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:09:51,558 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:51,590 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 [2020-11-29 19:09:51,592 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:51,592 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:51,592 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:51,592 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:51,596 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:09:51,596 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:09:51,605 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/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) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:51,631 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 [2020-11-29 19:09:51,632 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:51,632 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 19:09:51,632 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:51,632 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:51,632 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:51,633 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 19:09:51,633 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 19:09:51,634 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/z3 Starting monitored process 35 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:51,660 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 [2020-11-29 19:09:51,662 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:51,662 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:51,662 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:51,662 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:51,664 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:09:51,664 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:09:51,668 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/z3 Starting monitored process 36 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:51,697 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 [2020-11-29 19:09:51,699 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 19:09:51,699 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 19:09:51,699 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 19:09:51,699 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 19:09:51,707 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 19:09:51,708 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 19:09:51,728 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 19:09:51,741 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2020-11-29 19:09:51,741 INFO L444 ModelExtractionUtils]: 8 out of 16 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99a798a1-3f8c-4d9c-a553-bb1c88b2eb1a/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 19:09:51,750 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 19:09:51,754 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2020-11-29 19:09:51,754 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 19:09:51,755 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0, ULTIMATE.start_main_~xtmp~0) = -2*ULTIMATE.start_main_~y~0 + 2*ULTIMATE.start_main_~xtmp~0 + 1 Supporting invariants [1*ULTIMATE.start_main_~y~0 - 1 >= 0] [2020-11-29 19:09:51,807 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2020-11-29 19:09:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:51,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:09:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:51,895 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:09:51,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:51,895 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2020-11-29 19:09:51,896 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-11-29 19:09:51,929 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9. Second operand 3 states. Result 30 states and 37 transitions. Complement of second has 6 states. [2020-11-29 19:09:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:09:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 19:09:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2020-11-29 19:09:51,937 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 13 letters. Loop has 1 letters. [2020-11-29 19:09:51,937 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:51,937 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 19:09:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:51,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:09:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:51,992 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:09:51,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:52,004 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 1 loop predicates [2020-11-29 19:09:52,004 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-11-29 19:09:52,074 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9. Second operand 3 states. Result 30 states and 37 transitions. Complement of second has 6 states. [2020-11-29 19:09:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:09:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 19:09:52,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2020-11-29 19:09:52,077 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 13 letters. Loop has 1 letters. [2020-11-29 19:09:52,077 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:52,077 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 19:09:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:09:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:52,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 19:09:52,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:09:52,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 19:09:52,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 19:09:52,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:09:52,170 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2020-11-29 19:09:52,170 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-11-29 19:09:52,223 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9. Second operand 3 states. Result 32 states and 39 transitions. Complement of second has 5 states. [2020-11-29 19:09:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-29 19:09:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 19:09:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-29 19:09:52,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 13 letters. Loop has 1 letters. [2020-11-29 19:09:52,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:52,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-29 19:09:52,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:52,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 13 letters. Loop has 2 letters. [2020-11-29 19:09:52,229 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 19:09:52,229 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2020-11-29 19:09:52,230 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 19:09:52,230 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 0 states and 0 transitions. [2020-11-29 19:09:52,230 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 19:09:52,230 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 19:09:52,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 19:09:52,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 19:09:52,231 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:09:52,231 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:09:52,231 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 19:09:52,231 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 19:09:52,231 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 19:09:52,231 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 19:09:52,231 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 19:09:52,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 07:09:52 BoogieIcfgContainer [2020-11-29 19:09:52,242 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 19:09:52,245 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:09:52,245 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:09:52,245 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:09:52,246 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:09:28" (3/4) ... [2020-11-29 19:09:52,249 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 19:09:52,249 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:09:52,251 INFO L168 Benchmark]: Toolchain (without parser) took 24847.11 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 68.3 MB in the beginning and 97.4 MB in the end (delta: -29.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:52,252 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 102.8 MB. Free memory was 72.2 MB in the beginning and 72.2 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:52,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.29 ms. Allocated memory is still 102.8 MB. Free memory was 68.0 MB in the beginning and 80.3 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:52,257 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.49 ms. Allocated memory is still 102.8 MB. Free memory was 80.3 MB in the beginning and 78.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:52,258 INFO L168 Benchmark]: Boogie Preprocessor took 24.83 ms. Allocated memory is still 102.8 MB. Free memory was 78.8 MB in the beginning and 78.2 MB in the end (delta: 666.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:52,259 INFO L168 Benchmark]: RCFGBuilder took 314.36 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 68.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:52,263 INFO L168 Benchmark]: BuchiAutomizer took 24194.03 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 67.9 MB in the beginning and 97.4 MB in the end (delta: -29.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2020-11-29 19:09:52,263 INFO L168 Benchmark]: Witness Printer took 4.65 ms. Allocated memory is still 140.5 MB. Free memory is still 97.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:09:52,266 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 102.8 MB. Free memory was 72.2 MB in the beginning and 72.2 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.29 ms. Allocated memory is still 102.8 MB. Free memory was 68.0 MB in the beginning and 80.3 MB in the end (delta: -12.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.49 ms. Allocated memory is still 102.8 MB. Free memory was 80.3 MB in the beginning and 78.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.83 ms. Allocated memory is still 102.8 MB. Free memory was 78.8 MB in the beginning and 78.2 MB in the end (delta: 666.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 314.36 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 68.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 24194.03 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 67.9 MB in the beginning and 97.4 MB in the end (delta: -29.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.65 ms. Allocated memory is still 140.5 MB. Free memory is still 97.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 8 terminating modules (3 trivial, 4 deterministic, 1 nondeterministic). One deterministic module has affine ranking function y and consists of 5 locations. One deterministic module has affine ranking function 2 * xtmp + 1 and consists of 4 locations. One deterministic module has affine ranking function xtmp and consists of 5 locations. One deterministic module has affine ranking function xtmp and consists of 4 locations. One nondeterministic module has affine ranking function -2 * y + 2 * xtmp + 1 and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 24.1s and 8 iterations. TraceHistogramMax:2. Analysis of lassos took 22.2s. Construction of modules took 0.3s. Büchi inclusion checks took 1.2s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 32 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 6. Nontrivial modules had stage [4, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 56 SDtfs, 92 SDslu, 16 SDs, 0 SdLazy, 186 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso2 LassoPreprocessingBenchmarks: Lassos: inital24 mio100 ax149 hnf94 lsp64 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq175 hnf90 smp96 dnf100 smp100 tf103 neg99 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 32ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 18.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...