./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.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_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/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 75dd2ce3f6219a56f38a72471186bda1e7610d5c ......................................................................................................................................................................................................................................................................................................................................... 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 21:10:15,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:10:15,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:10:15,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:10:15,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:10:15,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:10:15,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:10:15,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:10:15,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:10:15,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:10:15,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:10:15,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:10:15,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:10:15,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:10:15,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:10:15,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:10:15,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:10:15,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:10:15,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:10:15,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:10:15,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:10:15,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:10:15,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:10:15,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:10:15,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:10:15,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:10:15,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:10:15,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:10:15,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:10:15,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:10:15,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:10:15,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:10:15,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:10:15,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:10:15,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:10:15,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:10:15,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:10:15,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:10:15,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:10:15,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:10:15,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:10:15,299 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 21:10:15,338 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:10:15,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:10:15,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:10:15,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:10:15,341 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:10:15,341 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 21:10:15,341 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 21:10:15,341 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 21:10:15,342 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 21:10:15,342 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 21:10:15,343 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 21:10:15,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:10:15,343 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 21:10:15,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:10:15,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:10:15,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 21:10:15,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 21:10:15,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 21:10:15,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:10:15,345 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 21:10:15,345 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:10:15,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 21:10:15,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:10:15,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:10:15,346 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 21:10:15,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:10:15,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:10:15,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:10:15,347 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 21:10:15,349 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 21:10:15,350 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_7b9b23f8-a180-42f2-a298-0bc163eac215/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75dd2ce3f6219a56f38a72471186bda1e7610d5c [2020-11-29 21:10:15,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:10:15,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:10:15,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:10:15,637 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:10:15,638 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:10:15,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2020-11-29 21:10:15,713 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/data/0448f14ee/df11406db4b243b7adca4d61417ddf56/FLAGd0b4074af [2020-11-29 21:10:16,282 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:10:16,282 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/sv-benchmarks/c/termination-crafted-lit/ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2020-11-29 21:10:16,294 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/data/0448f14ee/df11406db4b243b7adca4d61417ddf56/FLAGd0b4074af [2020-11-29 21:10:16,657 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/data/0448f14ee/df11406db4b243b7adca4d61417ddf56 [2020-11-29 21:10:16,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:10:16,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:10:16,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:10:16,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:10:16,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:10:16,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d9a0e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16, skipping insertion in model container [2020-11-29 21:10:16,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:10:16,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:10:16,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:10:16,893 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:10:16,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:10:16,925 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:10:16,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16 WrapperNode [2020-11-29 21:10:16,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:10:16,928 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:10:16,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:10:16,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:10:16,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:10:16,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:10:16,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:10:16,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:10:16,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... [2020-11-29 21:10:16,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:10:16,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:10:16,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:10:16,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:10:16,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/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 21:10:17,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:10:17,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:10:17,213 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:10:17,213 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-29 21:10:17,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:10:17 BoogieIcfgContainer [2020-11-29 21:10:17,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:10:17,217 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 21:10:17,217 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 21:10:17,221 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 21:10:17,222 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:10:17,223 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 09:10:16" (1/3) ... [2020-11-29 21:10:17,224 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@10eb7634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:10:17, skipping insertion in model container [2020-11-29 21:10:17,225 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:10:17,225 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:10:16" (2/3) ... [2020-11-29 21:10:17,225 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@10eb7634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 09:10:17, skipping insertion in model container [2020-11-29 21:10:17,225 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 21:10:17,226 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:10:17" (3/3) ... [2020-11-29 21:10:17,227 INFO L373 chiAutomizerObserver]: Analyzing ICFG ChenCookFuhsNimkarOHearn-TACAS2014-Introduction.c [2020-11-29 21:10:17,293 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 21:10:17,294 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 21:10:17,294 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 21:10:17,294 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:10:17,294 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:10:17,294 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 21:10:17,294 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:10:17,295 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 21:10:17,308 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-11-29 21:10:17,327 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 21:10:17,327 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:10:17,328 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:10:17,333 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 21:10:17,334 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 21:10:17,334 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 21:10:17,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-11-29 21:10:17,335 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 21:10:17,335 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:10:17,335 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:10:17,336 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 21:10:17,336 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 21:10:17,343 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~k~0, main_~i~0;havoc main_~k~0;havoc main_~i~0;main_~k~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~i~0 := main_#t~nondet1;havoc main_#t~nondet1; 8#L18true assume !(main_~k~0 >= 0);main_~i~0 := -1; 6#L23-1true [2020-11-29 21:10:17,345 INFO L796 eck$LassoCheckResult]: Loop: 6#L23-1true assume !!(main_~i~0 >= 0);main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 6#L23-1true [2020-11-29 21:10:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:17,352 INFO L82 PathProgramCache]: Analyzing trace with hash 998, now seen corresponding path program 1 times [2020-11-29 21:10:17,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:17,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204514933] [2020-11-29 21:10:17,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,456 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,472 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,491 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:17,496 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 1 times [2020-11-29 21:10:17,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:17,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539440718] [2020-11-29 21:10:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,512 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,520 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash 30953, now seen corresponding path program 1 times [2020-11-29 21:10:17,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:17,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020935086] [2020-11-29 21:10:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:10:17,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020935086] [2020-11-29 21:10:17,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:10:17,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 21:10:17,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093165400] [2020-11-29 21:10:17,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:10:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:10:17,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:10:17,781 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-11-29 21:10:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:10:17,817 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-11-29 21:10:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:10:17,821 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2020-11-29 21:10:17,822 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 21:10:17,825 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 3 states and 3 transitions. [2020-11-29 21:10:17,827 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-11-29 21:10:17,827 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2020-11-29 21:10:17,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3 transitions. [2020-11-29 21:10:17,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 21:10:17,828 INFO L691 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2020-11-29 21:10:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3 states and 3 transitions. [2020-11-29 21:10:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3 to 3. [2020-11-29 21:10:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 21:10:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3 transitions. [2020-11-29 21:10:17,854 INFO L714 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2020-11-29 21:10:17,854 INFO L594 BuchiCegarLoop]: Abstraction has 3 states and 3 transitions. [2020-11-29 21:10:17,854 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 21:10:17,855 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3 states and 3 transitions. [2020-11-29 21:10:17,855 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-29 21:10:17,856 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 21:10:17,856 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 21:10:17,856 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 21:10:17,856 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-29 21:10:17,857 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~k~0, main_~i~0;havoc main_~k~0;havoc main_~i~0;main_~k~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~i~0 := main_#t~nondet1;havoc main_#t~nondet1; 27#L18 assume main_~k~0 >= 0; 28#L23-1 [2020-11-29 21:10:17,857 INFO L796 eck$LassoCheckResult]: Loop: 28#L23-1 assume !!(main_~i~0 >= 0);main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 28#L23-1 [2020-11-29 21:10:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash 996, now seen corresponding path program 1 times [2020-11-29 21:10:17,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:17,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006038321] [2020-11-29 21:10:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,868 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,876 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,880 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:17,881 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 2 times [2020-11-29 21:10:17,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:17,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420144692] [2020-11-29 21:10:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,891 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,900 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:17,903 INFO L82 PathProgramCache]: Analyzing trace with hash 30891, now seen corresponding path program 1 times [2020-11-29 21:10:17,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:17,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272465997] [2020-11-29 21:10:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,922 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:10:17,926 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:10:17,930 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:10:18,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 09:10:18 BoogieIcfgContainer [2020-11-29 21:10:18,052 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 21:10:18,052 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:10:18,052 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:10:18,053 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:10:18,053 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:10:17" (3/4) ... [2020-11-29 21:10:18,056 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 21:10:18,089 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7b9b23f8-a180-42f2-a298-0bc163eac215/bin/uautomizer/witness.graphml [2020-11-29 21:10:18,089 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:10:18,091 INFO L168 Benchmark]: Toolchain (without parser) took 1427.46 ms. Allocated memory is still 109.1 MB. Free memory was 81.0 MB in the beginning and 83.8 MB in the end (delta: -2.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:10:18,092 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 79.7 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:10:18,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.91 ms. Allocated memory is still 109.1 MB. Free memory was 80.7 MB in the beginning and 88.0 MB in the end (delta: -7.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:10:18,094 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.56 ms. Allocated memory is still 109.1 MB. Free memory was 88.0 MB in the beginning and 86.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:10:18,094 INFO L168 Benchmark]: Boogie Preprocessor took 19.30 ms. Allocated memory is still 109.1 MB. Free memory was 86.8 MB in the beginning and 85.9 MB in the end (delta: 832.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:10:18,095 INFO L168 Benchmark]: RCFGBuilder took 231.98 ms. Allocated memory is still 109.1 MB. Free memory was 85.9 MB in the beginning and 78.1 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:10:18,096 INFO L168 Benchmark]: BuchiAutomizer took 835.09 ms. Allocated memory is still 109.1 MB. Free memory was 77.7 MB in the beginning and 85.3 MB in the end (delta: -7.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:10:18,096 INFO L168 Benchmark]: Witness Printer took 37.19 ms. Allocated memory is still 109.1 MB. Free memory was 85.3 MB in the beginning and 83.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:10:18,100 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 79.7 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 261.91 ms. Allocated memory is still 109.1 MB. Free memory was 80.7 MB in the beginning and 88.0 MB in the end (delta: -7.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.56 ms. Allocated memory is still 109.1 MB. Free memory was 88.0 MB in the beginning and 86.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.30 ms. Allocated memory is still 109.1 MB. Free memory was 86.8 MB in the beginning and 85.9 MB in the end (delta: 832.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 231.98 ms. Allocated memory is still 109.1 MB. Free memory was 85.9 MB in the beginning and 78.1 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 835.09 ms. Allocated memory is still 109.1 MB. Free memory was 77.7 MB in the beginning and 85.3 MB in the end (delta: -7.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Witness Printer took 37.19 ms. Allocated memory is still 109.1 MB. Free memory was 85.3 MB in the beginning and 83.8 MB in the end (delta: 1.5 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 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.7s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 0.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 1. Minimization of nondet autom 0. Automata minimization 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 3 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 8 SDtfs, 0 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 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: 23]: 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 {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5b5fd275=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@37dadfc1=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@64a4237d=0, i=0, k=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L15] int k, i; [L16] k = __VERIFIER_nondet_int() [L17] i = __VERIFIER_nondet_int() [L18] COND TRUE k >= 0 Loop: [L23] COND TRUE i >= 0 [L24] i = __VERIFIER_nondet_int() End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...