./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 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/GCD3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 0.2.0-69874e2 [2020-12-01 15:28:08,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:28:08,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:28:08,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:28:08,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:28:08,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:28:08,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:28:08,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:28:08,781 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:28:08,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:28:08,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:28:08,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:28:08,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:28:08,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:28:08,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:28:08,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:28:08,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:28:08,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:28:08,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:28:08,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:28:08,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:28:08,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:28:08,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:28:08,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:28:08,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:28:08,836 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:28:08,836 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:28:08,838 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:28:08,839 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:28:08,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:28:08,841 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:28:08,842 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:28:08,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:28:08,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:28:08,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:28:08,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:28:08,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:28:08,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:28:08,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:28:08,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:28:08,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:28:08,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-12-01 15:28:08,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:28:08,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:28:08,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:28:08,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:28:08,909 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:28:08,909 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-12-01 15:28:08,909 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-12-01 15:28:08,909 INFO L138 SettingsManager]: * Use old map elimination=false [2020-12-01 15:28:08,910 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-12-01 15:28:08,910 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-12-01 15:28:08,911 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-12-01 15:28:08,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:28:08,912 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 15:28:08,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:28:08,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:28:08,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-12-01 15:28:08,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-12-01 15:28:08,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-12-01 15:28:08,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:28:08,913 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-12-01 15:28:08,913 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:28:08,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-12-01 15:28:08,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:28:08,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:28:08,914 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-12-01 15:28:08,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:28:08,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:28:08,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:28:08,915 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-12-01 15:28:08,918 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-12-01 15:28:08,919 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aae625cda61f26fa063b78c3d3a58aff5ded8a89 [2020-12-01 15:28:09,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:28:09,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:28:09,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:28:09,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:28:09,212 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:28:09,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/GCD3.c [2020-12-01 15:28:09,302 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/data/c1b785e4e/22a5809d703848de8f26138308dc63c8/FLAG68795bbd2 [2020-12-01 15:28:09,770 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:28:09,771 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/sv-benchmarks/c/termination-restricted-15/GCD3.c [2020-12-01 15:28:09,777 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/data/c1b785e4e/22a5809d703848de8f26138308dc63c8/FLAG68795bbd2 [2020-12-01 15:28:10,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/data/c1b785e4e/22a5809d703848de8f26138308dc63c8 [2020-12-01 15:28:10,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:28:10,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:28:10,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:28:10,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:28:10,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:28:10,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@836e9a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10, skipping insertion in model container [2020-12-01 15:28:10,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:28:10,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:28:10,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:28:10,385 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:28:10,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:28:10,451 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:28:10,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10 WrapperNode [2020-12-01 15:28:10,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:28:10,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:28:10,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:28:10,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:28:10,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:28:10,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:28:10,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:28:10,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:28:10,496 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... [2020-12-01 15:28:10,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:28:10,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:28:10,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:28:10,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:28:10,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:10,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:28:10,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:28:10,882 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:28:10,882 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-01 15:28:10,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:28:10 BoogieIcfgContainer [2020-12-01 15:28:10,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:28:10,885 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-12-01 15:28:10,885 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-12-01 15:28:10,889 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-12-01 15:28:10,890 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:28:10,890 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 01.12 03:28:10" (1/3) ... [2020-12-01 15:28:10,892 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@773efe08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 03:28:10, skipping insertion in model container [2020-12-01 15:28:10,892 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:28:10,892 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:28:10" (2/3) ... [2020-12-01 15:28:10,893 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@773efe08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 03:28:10, skipping insertion in model container [2020-12-01 15:28:10,893 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:28:10,894 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:28:10" (3/3) ... [2020-12-01 15:28:10,895 INFO L389 chiAutomizerObserver]: Analyzing ICFG GCD3.c [2020-12-01 15:28:10,992 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-12-01 15:28:10,992 INFO L360 BuchiCegarLoop]: Hoare is false [2020-12-01 15:28:10,992 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-12-01 15:28:10,992 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:28:10,992 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:28:10,992 INFO L364 BuchiCegarLoop]: Difference is false [2020-12-01 15:28:11,003 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:28:11,003 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-12-01 15:28:11,015 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-12-01 15:28:11,058 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-12-01 15:28:11,058 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:28:11,059 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:28:11,064 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-12-01 15:28:11,065 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-12-01 15:28:11,065 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-12-01 15:28:11,065 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-12-01 15:28:11,067 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-12-01 15:28:11,067 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:28:11,067 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:28:11,068 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-12-01 15:28:11,068 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-12-01 15:28:11,075 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 [2020-12-01 15:28:11,076 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 [2020-12-01 15:28:11,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:11,082 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-12-01 15:28:11,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:11,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898871808] [2020-12-01 15:28:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,166 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,187 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1187012529, now seen corresponding path program 1 times [2020-12-01 15:28:11,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:11,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241125581] [2020-12-01 15:28:11,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:28:11,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241125581] [2020-12-01 15:28:11,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:28:11,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:28:11,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986235295] [2020-12-01 15:28:11,297 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-12-01 15:28:11,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:28:11,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:28:11,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:28:11,317 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-12-01 15:28:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:28:11,349 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2020-12-01 15:28:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:28:11,351 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 14 states and 17 transitions. [2020-12-01 15:28:11,353 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-12-01 15:28:11,357 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 14 states to 10 states and 13 transitions. [2020-12-01 15:28:11,358 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2020-12-01 15:28:11,358 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-12-01 15:28:11,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2020-12-01 15:28:11,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-12-01 15:28:11,360 INFO L692 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-12-01 15:28:11,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2020-12-01 15:28:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-01 15:28:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-01 15:28:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2020-12-01 15:28:11,389 INFO L715 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-12-01 15:28:11,389 INFO L595 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-12-01 15:28:11,389 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-12-01 15:28:11,390 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 13 transitions. [2020-12-01 15:28:11,390 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-12-01 15:28:11,391 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:28:11,391 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:28:11,391 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-12-01 15:28:11,391 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:28:11,392 INFO L794 eck$LassoCheckResult]: Stem: 39#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~tmp~0, main_~xtmp~0;havoc main_~x~0;havoc main_~y~0;havoc main_~tmp~0;havoc main_~xtmp~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1; 40#L13-2 [2020-12-01 15:28:11,392 INFO L796 eck$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 [2020-12-01 15:28:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-12-01 15:28:11,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:11,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369454474] [2020-12-01 15:28:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,399 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,402 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,404 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:11,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1817939337, now seen corresponding path program 1 times [2020-12-01 15:28:11,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:11,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677793776] [2020-12-01 15:28:11,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:28:11,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677793776] [2020-12-01 15:28:11,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:28:11,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-01 15:28:11,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687714335] [2020-12-01 15:28:11,429 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-12-01 15:28:11,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:28:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-01 15:28:11,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-01 15:28:11,431 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-12-01 15:28:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:28:11,446 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2020-12-01 15:28:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-01 15:28:11,447 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 14 transitions. [2020-12-01 15:28:11,448 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-12-01 15:28:11,449 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 14 transitions. [2020-12-01 15:28:11,449 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2020-12-01 15:28:11,450 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-12-01 15:28:11,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 14 transitions. [2020-12-01 15:28:11,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-12-01 15:28:11,450 INFO L692 BuchiCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-01 15:28:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 14 transitions. [2020-12-01 15:28:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 8. [2020-12-01 15:28:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-01 15:28:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-12-01 15:28:11,453 INFO L715 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-01 15:28:11,453 INFO L595 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-12-01 15:28:11,453 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-12-01 15:28:11,453 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2020-12-01 15:28:11,454 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-12-01 15:28:11,454 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:28:11,454 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:28:11,455 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-12-01 15:28:11,455 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:28:11,455 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 [2020-12-01 15:28:11,455 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 [2020-12-01 15:28:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2020-12-01 15:28:11,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:11,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936006909] [2020-12-01 15:28:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,462 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,483 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,485 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:11,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1818401082, now seen corresponding path program 1 times [2020-12-01 15:28:11,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:11,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582868208] [2020-12-01 15:28:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,499 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,506 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,508 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash 669111751, now seen corresponding path program 1 times [2020-12-01 15:28:11,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:11,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824162700] [2020-12-01 15:28:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,519 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:11,529 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:11,532 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:11,653 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:11,653 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:11,654 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:11,654 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:11,654 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:28:11,654 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:11,654 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:11,655 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:11,655 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration3_Loop [2020-12-01 15:28:11,655 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:11,655 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:11,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:11,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:11,692 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:11,845 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:11,852 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:11,862 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:11,863 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 [2020-12-01 15:28:11,886 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:28:11,886 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:11,931 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:11,931 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:28:11,952 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:28:11,952 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: [] Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:11,991 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:11,991 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:12,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:28:12,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:28:16,394 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:28:16,398 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:16,398 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:16,398 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:16,399 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:16,399 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:28:16,399 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:16,399 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:16,399 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:16,399 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration3_Loop [2020-12-01 15:28:16,399 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:16,399 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:16,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:16,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:16,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:16,563 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:16,568 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:16,581 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 [2020-12-01 15:28:16,583 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:16,583 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:16,584 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:16,584 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:16,591 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:28:16,591 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 [2020-12-01 15:28:16,604 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:16,642 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 [2020-12-01 15:28:16,644 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:16,644 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:16,644 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:16,644 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:16,650 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:28:16,650 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-12-01 15:28:16,668 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:16,693 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 [2020-12-01 15:28:16,694 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:16,695 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:28:16,695 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:16,695 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:16,695 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:16,699 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:28:16,700 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:28:16,718 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:28:16,723 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:28:16,723 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:16,734 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:28:16,734 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:28:16,735 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:28:16,735 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] [2020-12-01 15:28:16,769 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:28:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:16,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-01 15:28:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:16,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:28:16,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:28:16,942 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 [2020-12-01 15:28:16,943 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-12-01 15:28:17,023 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. [2020-12-01 15:28:17,023 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 [2020-12-01 15:28:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-01 15:28:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2020-12-01 15:28:17,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 7 letters. [2020-12-01 15:28:17,027 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:17,027 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 8 letters. Loop has 7 letters. [2020-12-01 15:28:17,028 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:17,028 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 14 letters. [2020-12-01 15:28:17,028 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:17,029 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 32 transitions. [2020-12-01 15:28:17,031 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-12-01 15:28:17,032 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 24 states and 28 transitions. [2020-12-01 15:28:17,032 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-12-01 15:28:17,032 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-12-01 15:28:17,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 28 transitions. [2020-12-01 15:28:17,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:28:17,033 INFO L692 BuchiCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-01 15:28:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 28 transitions. [2020-12-01 15:28:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2020-12-01 15:28:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-01 15:28:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-01 15:28:17,036 INFO L715 BuchiCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-01 15:28:17,036 INFO L595 BuchiCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-01 15:28:17,036 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-12-01 15:28:17,037 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 24 transitions. [2020-12-01 15:28:17,038 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-12-01 15:28:17,038 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:28:17,038 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:28:17,038 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-12-01 15:28:17,038 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-12-01 15:28:17,039 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 [2020-12-01 15:28:17,039 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 [2020-12-01 15:28:17,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:17,039 INFO L82 PathProgramCache]: Analyzing trace with hash 925834904, now seen corresponding path program 1 times [2020-12-01 15:28:17,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:17,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525246869] [2020-12-01 15:28:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:17,048 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:17,055 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:17,056 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash 64, now seen corresponding path program 1 times [2020-12-01 15:28:17,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:17,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581724998] [2020-12-01 15:28:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:17,062 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:17,065 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:17,065 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1363889015, now seen corresponding path program 2 times [2020-12-01 15:28:17,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:17,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859119082] [2020-12-01 15:28:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:17,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:17,086 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:17,093 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:17,102 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:17,178 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:17,179 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:17,179 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:17,179 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:17,179 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:28:17,179 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:17,179 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:17,179 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:17,179 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration4_Lasso [2020-12-01 15:28:17,180 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:17,180 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:17,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,188 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,365 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:17,366 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:17,377 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:17,377 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:28:17,387 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:28:17,387 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:17,413 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:17,414 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:28:17,420 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:28:17,420 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:17,442 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:17,442 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:17,506 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:28:17,507 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 [2020-12-01 15:28:17,666 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:28:17,668 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:17,669 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:17,669 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:17,669 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:17,669 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:28:17,669 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:17,669 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:17,669 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:17,669 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration4_Lasso [2020-12-01 15:28:17,669 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:17,670 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:17,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:17,809 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:17,809 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:17,819 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 [2020-12-01 15:28:17,821 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:17,821 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:17,821 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:17,821 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:17,825 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:28:17,825 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-12-01 15:28:17,841 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:17,890 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 Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:17,892 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:17,892 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:17,892 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:17,892 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:17,898 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:28:17,898 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-12-01 15:28:17,916 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:28:17,925 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-12-01 15:28:17,926 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:17,962 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 [2020-12-01 15:28:17,984 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2020-12-01 15:28:17,984 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:28:17,985 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] [2020-12-01 15:28:18,021 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2020-12-01 15:28:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:18,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-01 15:28:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:18,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:28:18,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:28:18,122 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 [2020-12-01 15:28:18,122 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 24 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-12-01 15:28:18,176 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. [2020-12-01 15:28:18,176 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 [2020-12-01 15:28:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-12-01 15:28:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-12-01 15:28:18,178 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 1 letters. [2020-12-01 15:28:18,178 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:18,178 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 1 letters. [2020-12-01 15:28:18,179 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:18,179 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2020-12-01 15:28:18,179 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:18,179 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2020-12-01 15:28:18,192 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-12-01 15:28:18,195 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 29 transitions. [2020-12-01 15:28:18,195 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-12-01 15:28:18,195 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-12-01 15:28:18,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 29 transitions. [2020-12-01 15:28:18,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:28:18,196 INFO L692 BuchiCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-01 15:28:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 29 transitions. [2020-12-01 15:28:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-01 15:28:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-01 15:28:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-01 15:28:18,202 INFO L715 BuchiCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-01 15:28:18,203 INFO L595 BuchiCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-01 15:28:18,203 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-12-01 15:28:18,203 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 28 transitions. [2020-12-01 15:28:18,205 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-12-01 15:28:18,219 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:28:18,219 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:28:18,232 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:28:18,232 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:28:18,233 INFO L794 eck$LassoCheckResult]: Stem: 256#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; 257#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 271#L17 assume !(0 == main_~y~0); 274#L21 assume !(main_~y~0 < 0); 273#L21-2 assume main_~xtmp~0 > 0; 272#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 270#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 262#L26-3 [2020-12-01 15:28:18,233 INFO L796 eck$LassoCheckResult]: Loop: 262#L26-3 main_~y~0 := main_~xtmp~0; 263#L25-1 main_~x~0 := main_~tmp~0; 258#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 259#L17 assume !(0 == main_~y~0); 252#L21 assume !(main_~y~0 < 0); 253#L21-2 assume main_~xtmp~0 > 0; 266#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 262#L26-3 [2020-12-01 15:28:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1363889017, now seen corresponding path program 1 times [2020-12-01 15:28:18,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:18,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633877155] [2020-12-01 15:28:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:18,250 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:18,270 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:18,272 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1776384388, now seen corresponding path program 2 times [2020-12-01 15:28:18,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:18,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384256775] [2020-12-01 15:28:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:18,281 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:18,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:18,292 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:18,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1008190014, now seen corresponding path program 1 times [2020-12-01 15:28:18,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:18,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792150511] [2020-12-01 15:28:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:28:18,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792150511] [2020-12-01 15:28:18,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301032584] [2020-12-01 15:28:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-12-01 15:28:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:18,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:28:18,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:28:18,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:28:18,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-01 15:28:18,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046922779] [2020-12-01 15:28:18,580 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:18,580 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:18,581 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:18,581 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:18,582 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:28:18,582 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:18,582 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:18,582 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:18,582 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration5_Loop [2020-12-01 15:28:18,582 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:18,583 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:18,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:18,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:18,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:18,708 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:18,708 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:18,723 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:18,723 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:18,738 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:28:18,738 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:18,778 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:18,778 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:18,845 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:28:18,845 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:20,296 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:28:20,299 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:20,299 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:20,299 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:20,299 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:20,299 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:28:20,299 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:20,299 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:20,299 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:20,299 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration5_Loop [2020-12-01 15:28:20,299 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:20,299 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:20,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:20,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:20,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:20,431 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:20,431 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:20,445 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 [2020-12-01 15:28:20,447 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:20,447 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:20,447 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:20,447 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:20,451 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:28:20,451 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 [2020-12-01 15:28:20,470 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:20,508 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 [2020-12-01 15:28:20,511 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:20,512 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:28:20,512 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:20,512 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:20,512 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:20,515 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:28:20,515 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:28:20,531 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:28:20,557 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:28:20,557 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:20,564 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:28:20,564 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:28:20,564 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:28:20,565 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~xtmp~0) = 1*ULTIMATE.start_main_~xtmp~0 Supporting invariants [] [2020-12-01 15:28:20,596 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:28:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:20,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-01 15:28:20,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:28:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:28:20,688 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 [2020-12-01 15:28:20,689 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 28 transitions. cyclomatic complexity: 8 Second operand 4 states. [2020-12-01 15:28:20,756 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. [2020-12-01 15:28:20,756 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 [2020-12-01 15:28:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-12-01 15:28:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2020-12-01 15:28:20,757 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 7 letters. Loop has 7 letters. [2020-12-01 15:28:20,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:20,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 7 letters. [2020-12-01 15:28:20,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:20,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 7 letters. Loop has 14 letters. [2020-12-01 15:28:20,762 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:20,762 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 58 states and 72 transitions. [2020-12-01 15:28:20,768 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-12-01 15:28:20,770 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 58 states to 53 states and 67 transitions. [2020-12-01 15:28:20,770 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2020-12-01 15:28:20,773 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-12-01 15:28:20,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 67 transitions. [2020-12-01 15:28:20,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:28:20,774 INFO L692 BuchiCegarLoop]: Abstraction has 53 states and 67 transitions. [2020-12-01 15:28:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states and 67 transitions. [2020-12-01 15:28:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-12-01 15:28:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-01 15:28:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-12-01 15:28:20,783 INFO L715 BuchiCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-12-01 15:28:20,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:28:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:28:20,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:28:20,786 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 8 states. [2020-12-01 15:28:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:28:20,924 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-12-01 15:28:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:28:20,925 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 60 transitions. [2020-12-01 15:28:20,934 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-12-01 15:28:20,935 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 31 states and 37 transitions. [2020-12-01 15:28:20,935 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2020-12-01 15:28:20,935 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 29 [2020-12-01 15:28:20,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 37 transitions. [2020-12-01 15:28:20,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:28:20,936 INFO L692 BuchiCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-01 15:28:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 37 transitions. [2020-12-01 15:28:20,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-01 15:28:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-01 15:28:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-01 15:28:20,942 INFO L715 BuchiCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-01 15:28:20,942 INFO L595 BuchiCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-01 15:28:20,942 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-12-01 15:28:20,942 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 27 transitions. [2020-12-01 15:28:20,943 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-12-01 15:28:20,943 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:28:20,943 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:28:20,944 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:28:20,944 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:28:20,944 INFO L794 eck$LassoCheckResult]: Stem: 559#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; 560#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 576#L17 assume !(0 == main_~y~0); 575#L21 assume !(main_~y~0 < 0); 574#L21-2 assume main_~xtmp~0 > 0; 573#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 572#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 563#L26-3 [2020-12-01 15:28:20,944 INFO L796 eck$LassoCheckResult]: Loop: 563#L26-3 main_~y~0 := main_~xtmp~0; 564#L25-1 main_~x~0 := main_~tmp~0; 561#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 562#L17 assume !(0 == main_~y~0); 557#L21 assume !(main_~y~0 < 0); 558#L21-2 assume main_~xtmp~0 > 0; 565#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 566#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 563#L26-3 [2020-12-01 15:28:20,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:20,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1363889017, now seen corresponding path program 2 times [2020-12-01 15:28:20,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:20,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027818655] [2020-12-01 15:28:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:20,960 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:20,967 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:20,969 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:20,969 INFO L82 PathProgramCache]: Analyzing trace with hash -766658727, now seen corresponding path program 1 times [2020-12-01 15:28:20,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:20,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262604143] [2020-12-01 15:28:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:20,979 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:20,991 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:20,995 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:20,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1189119455, now seen corresponding path program 2 times [2020-12-01 15:28:20,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:20,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024550504] [2020-12-01 15:28:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:21,008 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:21,032 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:21,034 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:21,102 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:21,102 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:21,102 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:21,103 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:21,103 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:28:21,103 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:21,103 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:21,103 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:21,103 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration6_Loop [2020-12-01 15:28:21,103 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:21,103 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:21,105 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:21,124 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:21,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:21,205 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:21,205 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:21,209 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:21,209 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:21,249 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:28:21,249 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:28:28,832 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:28:28,835 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:28,835 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:28,835 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:28,835 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:28,835 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:28:28,835 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:28,836 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:28,836 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:28,836 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration6_Loop [2020-12-01 15:28:28,836 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:28,836 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:28,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:28,871 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:28,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:28,959 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:28,960 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:28,969 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 [2020-12-01 15:28:28,971 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:28,971 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:28:28,971 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:28,971 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:28,971 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:28,974 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:28:28,974 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:28:28,979 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:28:28,983 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:28:28,983 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:28,986 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:28:28,986 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:28:28,986 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:28:28,986 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 [2020-12-01 15:28:29,008 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:28:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:29,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-01 15:28:29,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:29,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:28:29,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:28:29,105 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 [2020-12-01 15:28:29,105 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 27 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-12-01 15:28:29,150 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. [2020-12-01 15:28:29,151 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 [2020-12-01 15:28:29,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-12-01 15:28:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2020-12-01 15:28:29,152 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 8 letters. [2020-12-01 15:28:29,153 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:29,153 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 15 letters. Loop has 8 letters. [2020-12-01 15:28:29,153 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:29,153 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 16 letters. [2020-12-01 15:28:29,154 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:29,154 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 54 transitions. [2020-12-01 15:28:29,155 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-12-01 15:28:29,156 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 37 states and 45 transitions. [2020-12-01 15:28:29,156 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2020-12-01 15:28:29,156 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-12-01 15:28:29,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 45 transitions. [2020-12-01 15:28:29,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:28:29,156 INFO L692 BuchiCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-12-01 15:28:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 45 transitions. [2020-12-01 15:28:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-12-01 15:28:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-01 15:28:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-01 15:28:29,159 INFO L715 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-01 15:28:29,159 INFO L595 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-01 15:28:29,160 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-12-01 15:28:29,160 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2020-12-01 15:28:29,160 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-12-01 15:28:29,160 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:28:29,161 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:28:29,161 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-01 15:28:29,161 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-12-01 15:28:29,162 INFO L794 eck$LassoCheckResult]: Stem: 699#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; 700#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 718#L17 assume !(0 == main_~y~0); 717#L21 assume !(main_~y~0 < 0); 716#L21-2 assume main_~xtmp~0 > 0; 715#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 713#L26-2 assume !(main_~xtmp~0 >= main_~y~0); 712#L26-3 main_~y~0 := main_~xtmp~0; 708#L25-1 main_~x~0 := main_~tmp~0; 701#L13-2 assume !!(main_~y~0 > 0 && main_~x~0 > 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 702#L17 assume !(0 == main_~y~0); 695#L21 assume !(main_~y~0 < 0); 696#L21-2 assume main_~xtmp~0 > 0; 709#L26-2 [2020-12-01 15:28:29,162 INFO L796 eck$LassoCheckResult]: Loop: 709#L26-2 assume !!(main_~xtmp~0 >= main_~y~0);main_~xtmp~0 := main_~xtmp~0 - main_~y~0; 709#L26-2 [2020-12-01 15:28:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -521667071, now seen corresponding path program 3 times [2020-12-01 15:28:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:29,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331195915] [2020-12-01 15:28:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:29,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:29,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:29,179 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:29,180 INFO L82 PathProgramCache]: Analyzing trace with hash 64, now seen corresponding path program 2 times [2020-12-01 15:28:29,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:29,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150074265] [2020-12-01 15:28:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:29,183 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:29,185 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:29,186 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:29,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:29,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1008190016, now seen corresponding path program 4 times [2020-12-01 15:28:29,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:28:29,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118429879] [2020-12-01 15:28:29,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:28:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:29,194 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:28:29,201 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:28:29,203 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:28:29,302 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:29,303 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:29,303 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:29,303 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:29,303 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:28:29,303 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:29,303 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:29,303 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:29,303 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration7_Lasso [2020-12-01 15:28:29,303 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:29,303 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:29,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,408 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:29,409 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:29,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:29,418 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:29,424 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:28:29,424 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:29,447 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:28:29,447 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:29,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:28:29,509 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:28:29,674 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:28:29,676 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:28:29,677 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:28:29,677 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:28:29,677 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:28:29,677 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:28:29,677 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:29,677 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:28:29,677 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:28:29,677 INFO L133 ssoRankerPreferences]: Filename of dumped script: GCD3.c_Iteration7_Lasso [2020-12-01 15:28:29,677 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:28:29,677 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:28:29,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,692 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:28:29,819 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:28:29,819 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) [2020-12-01 15:28:29,827 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 Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:29,828 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:29,828 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:28:29,828 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:29,828 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:29,828 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:29,829 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:28:29,829 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:28:29,830 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:29,851 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 [2020-12-01 15:28:29,853 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:29,853 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:28:29,853 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:29,853 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:29,853 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:29,853 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:28:29,853 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:28:29,855 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:29,878 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 [2020-12-01 15:28:29,879 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:29,879 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:29,880 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:29,880 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:29,882 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:28:29,883 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-12-01 15:28:29,899 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:29,921 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 [2020-12-01 15:28:29,922 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:29,922 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:28:29,922 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:29,922 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:29,922 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:29,923 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:28:29,923 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:28:29,924 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:29,944 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 [2020-12-01 15:28:29,945 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:29,945 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:29,946 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:29,946 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:29,947 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:28:29,947 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-12-01 15:28:29,950 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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 [2020-12-01 15:28:29,970 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 [2020-12-01 15:28:29,972 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:28:29,972 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:28:29,972 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:28:29,972 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:28:29,975 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-12-01 15:28:29,976 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-12-01 15:28:29,982 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:28:29,993 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2020-12-01 15:28:29,993 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_ce4edcd3-dd21-468c-a319-bdb502b4aea5/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) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:28:29,995 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:28:29,997 INFO L438 nArgumentSynthesizer]: Removed 1 redundant supporting invariants from a total of 2. [2020-12-01 15:28:29,998 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:28:29,998 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] [2020-12-01 15:28:30,022 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2020-12-01 15:28:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:30,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-01 15:28:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:30,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:28:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:28:30,099 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 [2020-12-01 15:28:30,099 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-12-01 15:28:30,138 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. [2020-12-01 15:28:30,138 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 [2020-12-01 15:28:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-12-01 15:28:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2020-12-01 15:28:30,139 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 13 letters. Loop has 1 letters. [2020-12-01 15:28:30,139 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:30,139 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:28:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:30,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-01 15:28:30,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:30,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:28:30,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:28:30,220 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 [2020-12-01 15:28:30,220 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-12-01 15:28:30,260 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. [2020-12-01 15:28:30,261 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 [2020-12-01 15:28:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-12-01 15:28:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2020-12-01 15:28:30,262 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 13 letters. Loop has 1 letters. [2020-12-01 15:28:30,262 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:30,262 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:28:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:28:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:30,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-01 15:28:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:28:30,389 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-01 15:28:30,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:28:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:28:30,390 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 [2020-12-01 15:28:30,390 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-12-01 15:28:30,440 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. [2020-12-01 15:28:30,441 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 [2020-12-01 15:28:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-12-01 15:28:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-12-01 15:28:30,441 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 13 letters. Loop has 1 letters. [2020-12-01 15:28:30,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:30,444 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 14 letters. Loop has 1 letters. [2020-12-01 15:28:30,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:30,444 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 13 letters. Loop has 2 letters. [2020-12-01 15:28:30,445 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:28:30,445 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2020-12-01 15:28:30,448 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-12-01 15:28:30,448 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 0 states and 0 transitions. [2020-12-01 15:28:30,448 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-12-01 15:28:30,448 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-12-01 15:28:30,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-12-01 15:28:30,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-12-01 15:28:30,449 INFO L692 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:28:30,449 INFO L715 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:28:30,449 INFO L595 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:28:30,449 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-12-01 15:28:30,449 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-12-01 15:28:30,449 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-12-01 15:28:30,450 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-12-01 15:28:30,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.12 03:28:30 BoogieIcfgContainer [2020-12-01 15:28:30,455 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-12-01 15:28:30,456 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:28:30,456 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:28:30,456 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:28:30,457 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:28:10" (3/4) ... [2020-12-01 15:28:30,459 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-01 15:28:30,460 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:28:30,461 INFO L168 Benchmark]: Toolchain (without parser) took 20289.50 ms. Allocated memory was 92.3 MB in the beginning and 142.6 MB in the end (delta: 50.3 MB). Free memory was 61.9 MB in the beginning and 112.1 MB in the end (delta: -50.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:28:30,462 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 51.0 MB in the beginning and 50.9 MB in the end (delta: 34.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:28:30,464 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.94 ms. Allocated memory is still 92.3 MB. Free memory was 61.6 MB in the beginning and 71.5 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:28:30,465 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.87 ms. Allocated memory is still 92.3 MB. Free memory was 71.5 MB in the beginning and 70.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:28:30,465 INFO L168 Benchmark]: Boogie Preprocessor took 31.96 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 69.4 MB in the end (delta: 839.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:28:30,465 INFO L168 Benchmark]: RCFGBuilder took 363.42 ms. Allocated memory is still 92.3 MB. Free memory was 69.4 MB in the beginning and 59.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:28:30,468 INFO L168 Benchmark]: BuchiAutomizer took 19570.57 ms. Allocated memory was 92.3 MB in the beginning and 142.6 MB in the end (delta: 50.3 MB). Free memory was 59.3 MB in the beginning and 112.1 MB in the end (delta: -52.8 MB). Peak memory consumption was 238.0 kB. Max. memory is 16.1 GB. [2020-12-01 15:28:30,469 INFO L168 Benchmark]: Witness Printer took 3.84 ms. Allocated memory is still 142.6 MB. Free memory is still 112.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:28:30,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 51.0 MB in the beginning and 50.9 MB in the end (delta: 34.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 270.94 ms. Allocated memory is still 92.3 MB. Free memory was 61.6 MB in the beginning and 71.5 MB in the end (delta: -9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.87 ms. Allocated memory is still 92.3 MB. Free memory was 71.5 MB in the beginning and 70.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.96 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 69.4 MB in the end (delta: 839.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 363.42 ms. Allocated memory is still 92.3 MB. Free memory was 69.4 MB in the beginning and 59.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 19570.57 ms. Allocated memory was 92.3 MB in the beginning and 142.6 MB in the end (delta: 50.3 MB). Free memory was 59.3 MB in the beginning and 112.1 MB in the end (delta: -52.8 MB). Peak memory consumption was 238.0 kB. Max. memory is 16.1 GB. * Witness Printer took 3.84 ms. Allocated memory is still 142.6 MB. Free memory is still 112.1 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 * y + 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 19.4s and 8 iterations. TraceHistogramMax:2. Analysis of lassos took 17.8s. Construction of modules took 0.1s. Büchi inclusion checks took 1.1s. 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, 93 SDslu, 16 SDs, 0 SdLazy, 185 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso2 LassoPreprocessingBenchmarks: Lassos: inital22 mio100 ax154 hnf100 lsp64 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq175 hnf90 smp96 dnf100 smp100 tf103 neg99 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 35ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 14.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...