./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/GCD2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/GCD2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/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 f19bc75dcbe901d738916f7ca817c5a4f2f97f97 .................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:13:00,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:13:00,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:13:00,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:13:00,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:13:00,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:13:00,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:13:00,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:13:00,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:13:00,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:13:00,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:13:00,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:13:00,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:13:00,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:13:00,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:13:00,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:13:00,268 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:13:00,269 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:13:00,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:13:00,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:13:00,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:13:00,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:13:00,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:13:00,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:13:00,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:13:00,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:13:00,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:13:00,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:13:00,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:13:00,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:13:00,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:13:00,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:13:00,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:13:00,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:13:00,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:13:00,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:13:00,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:13:00,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:13:00,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:13:00,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:13:00,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:13:00,297 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 22:13:00,321 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:13:00,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:13:00,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:13:00,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:13:00,324 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:13:00,324 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 22:13:00,325 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 22:13:00,325 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 22:13:00,325 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 22:13:00,326 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 22:13:00,326 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 22:13:00,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:13:00,327 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 22:13:00,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:13:00,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:13:00,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 22:13:00,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 22:13:00,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 22:13:00,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:13:00,330 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 22:13:00,330 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:13:00,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 22:13:00,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:13:00,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:13:00,331 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 22:13:00,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:13:00,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:13:00,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:13:00,332 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 22:13:00,333 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 22:13:00,334 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_cc6f635a-ce06-45bc-9f82-841f2361a002/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f19bc75dcbe901d738916f7ca817c5a4f2f97f97 [2020-11-29 22:13:00,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:13:00,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:13:00,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:13:00,609 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:13:00,610 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:13:00,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/GCD2.c [2020-11-29 22:13:00,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/data/4f50c29c4/9f4fbcb26c304827a167a924297f710f/FLAGf23dd346a [2020-11-29 22:13:01,190 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:13:01,190 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/sv-benchmarks/c/termination-restricted-15/GCD2.c [2020-11-29 22:13:01,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/data/4f50c29c4/9f4fbcb26c304827a167a924297f710f/FLAGf23dd346a [2020-11-29 22:13:01,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/data/4f50c29c4/9f4fbcb26c304827a167a924297f710f [2020-11-29 22:13:01,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:13:01,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:13:01,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:13:01,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:13:01,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:13:01,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24880c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01, skipping insertion in model container [2020-11-29 22:13:01,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:13:01,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:13:01,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:13:01,753 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:13:01,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:13:01,787 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:13:01,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01 WrapperNode [2020-11-29 22:13:01,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:13:01,795 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:13:01,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:13:01,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:13:01,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:13:01,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:13:01,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:13:01,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:13:01,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... [2020-11-29 22:13:01,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:13:01,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:13:01,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:13:01,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:13:01,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:13:01,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:13:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:13:02,058 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:13:02,058 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 22:13:02,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:13:02 BoogieIcfgContainer [2020-11-29 22:13:02,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:13:02,061 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 22:13:02,061 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 22:13:02,064 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 22:13:02,065 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:13:02,065 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 10:13:01" (1/3) ... [2020-11-29 22:13:02,066 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@17bd2fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 10:13:02, skipping insertion in model container [2020-11-29 22:13:02,066 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:13:02,066 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:13:01" (2/3) ... [2020-11-29 22:13:02,067 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@17bd2fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 10:13:02, skipping insertion in model container [2020-11-29 22:13:02,067 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:13:02,067 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:13:02" (3/3) ... [2020-11-29 22:13:02,068 INFO L373 chiAutomizerObserver]: Analyzing ICFG GCD2.c [2020-11-29 22:13:02,114 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 22:13:02,114 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 22:13:02,114 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 22:13:02,114 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:13:02,114 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:13:02,115 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 22:13:02,115 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:13:02,115 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 22:13:02,127 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-11-29 22:13:02,140 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 22:13:02,140 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:13:02,141 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:13:02,145 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 22:13:02,145 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 22:13:02,145 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 22:13:02,145 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-11-29 22:13:02,146 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 22:13:02,146 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:13:02,146 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:13:02,147 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 22:13:02,147 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 22:13:02,152 INFO L794 eck$LassoCheckResult]: Stem: 4#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; 5#L13-2true [2020-11-29 22:13:02,152 INFO L796 eck$LassoCheckResult]: Loop: 5#L13-2true assume !!((0 != main_~y~0 && main_~x~0 >= 0) && main_~y~0 >= 0);main_~tmp~0 := main_~y~0;main_~xtmp~0 := main_~x~0; 6#L17true assume main_~x~0 == main_~y~0;main_~y~0 := 0; 8#L21-3true main_~y~0 := main_~xtmp~0;main_~x~0 := main_~tmp~0; 5#L13-2true [2020-11-29 22:13:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:13:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 22:13:02,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:13:02,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726776224] [2020-11-29 22:13:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:13:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:13:02,231 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:13:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:13:02,236 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:13:02,251 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:13:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:13:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash 39832, now seen corresponding path program 1 times [2020-11-29 22:13:02,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:13:02,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626261965] [2020-11-29 22:13:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:13:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:13:02,269 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:13:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:13:02,276 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:13:02,279 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:13:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:13:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash 963353, now seen corresponding path program 1 times [2020-11-29 22:13:02,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:13:02,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228991138] [2020-11-29 22:13:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:13:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:13:02,292 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:13:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:13:02,300 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:13:02,302 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:13:02,512 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2020-11-29 22:13:02,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 10:13:02 BoogieIcfgContainer [2020-11-29 22:13:02,615 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 22:13:02,619 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:13:02,619 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:13:02,619 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:13:02,620 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:13:02" (3/4) ... [2020-11-29 22:13:02,623 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 22:13:02,673 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cc6f635a-ce06-45bc-9f82-841f2361a002/bin/uautomizer/witness.graphml [2020-11-29 22:13:02,673 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:13:02,675 INFO L168 Benchmark]: Toolchain (without parser) took 1094.72 ms. Allocated memory is still 125.8 MB. Free memory was 96.6 MB in the beginning and 66.6 MB in the end (delta: 30.1 MB). Peak memory consumption was 30.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:13:02,676 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 79.7 MB. Free memory was 40.0 MB in the beginning and 39.9 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:13:02,677 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.03 ms. Allocated memory is still 125.8 MB. Free memory was 96.6 MB in the beginning and 103.3 MB in the end (delta: -6.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:13:02,677 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.00 ms. Allocated memory is still 125.8 MB. Free memory was 103.3 MB in the beginning and 101.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:13:02,678 INFO L168 Benchmark]: Boogie Preprocessor took 19.14 ms. Allocated memory is still 125.8 MB. Free memory was 101.7 MB in the beginning and 101.0 MB in the end (delta: 611.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:13:02,679 INFO L168 Benchmark]: RCFGBuilder took 212.03 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 92.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:13:02,680 INFO L168 Benchmark]: BuchiAutomizer took 554.55 ms. Allocated memory is still 125.8 MB. Free memory was 91.7 MB in the beginning and 68.0 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:13:02,680 INFO L168 Benchmark]: Witness Printer took 54.80 ms. Allocated memory is still 125.8 MB. Free memory was 68.0 MB in the beginning and 66.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:13:02,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 79.7 MB. Free memory was 40.0 MB in the beginning and 39.9 MB in the end (delta: 71.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 212.03 ms. Allocated memory is still 125.8 MB. Free memory was 96.6 MB in the beginning and 103.3 MB in the end (delta: -6.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.00 ms. Allocated memory is still 125.8 MB. Free memory was 103.3 MB in the beginning and 101.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.14 ms. Allocated memory is still 125.8 MB. Free memory was 101.7 MB in the beginning and 101.0 MB in the end (delta: 611.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 212.03 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 92.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 554.55 ms. Allocated memory is still 125.8 MB. Free memory was 91.7 MB in the beginning and 68.0 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 54.80 ms. Allocated memory is still 125.8 MB. Free memory was 68.0 MB in the beginning and 66.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.4s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: No data available LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {xtmp=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3f0c211e=0, tmp=1, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6e1166f7=0, x=1, y=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int x; [L7] int y; [L8] int tmp; [L9] int xtmp; [L10] x = __VERIFIER_nondet_int() [L11] y = __VERIFIER_nondet_int() Loop: [L13] COND TRUE (y != 0 && x >= 0) && y >= 0 [L14] tmp = y [L15] xtmp = x [L17] COND TRUE x == y [L18] y = 0 [L26] y = xtmp [L27] x = tmp End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...