./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.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_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/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 f21f1881350863de740f7b7321104b53617dd8ce .............................................................................................................................................................................................................................................................................. 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 [2020-11-28 03:07:00,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:07:00,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:07:00,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:07:00,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:07:00,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:07:00,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:07:00,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:07:00,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:07:00,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:07:00,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:07:00,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:07:00,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:07:00,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:07:00,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:07:00,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:07:00,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:07:00,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:07:00,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:07:00,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:07:00,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:07:00,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:07:00,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:07:00,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:07:00,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:07:00,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:07:00,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:07:00,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:07:00,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:07:00,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:07:00,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:07:00,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:07:00,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:07:00,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:07:00,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:07:00,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:07:00,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:07:00,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:07:00,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:07:00,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:07:00,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:07:00,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-28 03:07:00,831 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:07:00,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:07:00,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:07:00,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:07:00,834 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:07:00,835 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:07:00,835 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:07:00,836 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:07:00,836 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:07:00,837 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:07:00,837 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:07:00,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:07:00,838 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:07:00,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:07:00,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:07:00,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:07:00,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:07:00,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:07:00,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:07:00,842 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:07:00,842 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:07:00,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:07:00,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:07:00,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:07:00,844 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:07:00,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:07:00,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:07:00,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:07:00,845 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:07:00,846 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:07:00,847 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_d8b9fa9b-d015-426b-99b3-295d8edeb28a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f21f1881350863de740f7b7321104b53617dd8ce [2020-11-28 03:07:01,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:07:01,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:07:01,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:07:01,205 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:07:01,206 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:07:01,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2020-11-28 03:07:01,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/data/b1192aaa3/d7c84f6c222a4b8aa9b5d2005a399a17/FLAGaf31964cf [2020-11-28 03:07:01,841 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:07:01,841 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2020-11-28 03:07:01,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/data/b1192aaa3/d7c84f6c222a4b8aa9b5d2005a399a17/FLAGaf31964cf [2020-11-28 03:07:02,198 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/data/b1192aaa3/d7c84f6c222a4b8aa9b5d2005a399a17 [2020-11-28 03:07:02,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:07:02,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:07:02,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:07:02,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:07:02,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:07:02,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f6a53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02, skipping insertion in model container [2020-11-28 03:07:02,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:07:02,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:07:02,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:07:02,395 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:07:02,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:07:02,460 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:07:02,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02 WrapperNode [2020-11-28 03:07:02,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:07:02,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:07:02,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:07:02,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:07:02,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:07:02,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:07:02,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:07:02,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:07:02,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... [2020-11-28 03:07:02,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:07:02,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:07:02,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:07:02,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:07:02,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/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 [2020-11-28 03:07:02,633 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2020-11-28 03:07:02,634 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2020-11-28 03:07:02,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:07:02,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:07:02,818 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:07:02,818 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-28 03:07:02,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:07:02 BoogieIcfgContainer [2020-11-28 03:07:02,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:07:02,823 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:07:02,823 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:07:02,827 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:07:02,828 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:07:02,828 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:07:02" (1/3) ... [2020-11-28 03:07:02,830 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@388eb5ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:07:02, skipping insertion in model container [2020-11-28 03:07:02,830 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:07:02,831 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:07:02" (2/3) ... [2020-11-28 03:07:02,831 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@388eb5ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:07:02, skipping insertion in model container [2020-11-28 03:07:02,831 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:07:02,832 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:07:02" (3/3) ... [2020-11-28 03:07:02,833 INFO L373 chiAutomizerObserver]: Analyzing ICFG RecursiveNonterminating-1.c [2020-11-28 03:07:02,920 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:07:02,920 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:07:02,920 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:07:02,921 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:07:02,921 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:07:02,921 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:07:02,921 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:07:02,921 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:07:02,937 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-11-28 03:07:02,966 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:07:02,966 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:07:02,966 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:07:02,975 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:07:02,975 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:07:02,975 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:07:02,975 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-11-28 03:07:02,978 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:07:02,978 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:07:02,978 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:07:02,979 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:07:02,980 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:07:02,988 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~n~0;main_~n~0 := main_#t~nondet0;havoc main_#t~nondet0; 8#L18true assume !!(main_~n~0 <= 2147483646); 11#L19true call rec(main_~n~0, 1 + main_~n~0);< 3#recENTRYtrue [2020-11-28 03:07:02,988 INFO L796 eck$LassoCheckResult]: Loop: 3#recENTRYtrue ~x := #in~x;~y := #in~y; 10#L11true assume ~x <= 23 && ~x >= -42; 5#L12true call rec(2 * ~y - 2, 1 + ~x);< 3#recENTRYtrue [2020-11-28 03:07:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash 39889, now seen corresponding path program 1 times [2020-11-28 03:07:03,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:03,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213286396] [2020-11-28 03:07:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:07:03,100 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:07:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:07:03,107 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:07:03,124 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:07:03,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:03,127 INFO L82 PathProgramCache]: Analyzing trace with hash 29905, now seen corresponding path program 1 times [2020-11-28 03:07:03,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:03,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594022650] [2020-11-28 03:07:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:07:03,136 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:07:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:07:03,143 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:07:03,151 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:07:03,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:07:03,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1188333313, now seen corresponding path program 1 times [2020-11-28 03:07:03,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:07:03,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742867949] [2020-11-28 03:07:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:07:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:07:03,172 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:07:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:07:03,197 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:07:03,200 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:07:03,414 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-28 03:07:03,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:07:03 BoogieIcfgContainer [2020-11-28 03:07:03,660 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:07:03,662 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:07:03,663 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:07:03,663 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:07:03,663 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:07:02" (3/4) ... [2020-11-28 03:07:03,666 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-28 03:07:03,708 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d8b9fa9b-d015-426b-99b3-295d8edeb28a/bin/uautomizer/witness.graphml [2020-11-28 03:07:03,708 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:07:03,710 INFO L168 Benchmark]: Toolchain (without parser) took 1506.75 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 62.0 MB in the beginning and 74.5 MB in the end (delta: -12.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:03,711 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 92.3 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:07:03,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.91 ms. Allocated memory is still 92.3 MB. Free memory was 61.8 MB in the beginning and 70.2 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:03,712 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.11 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 68.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:07:03,713 INFO L168 Benchmark]: Boogie Preprocessor took 27.32 ms. Allocated memory is still 92.3 MB. Free memory was 68.9 MB in the beginning and 68.0 MB in the end (delta: 916.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:07:03,714 INFO L168 Benchmark]: RCFGBuilder took 283.84 ms. Allocated memory is still 92.3 MB. Free memory was 68.0 MB in the beginning and 59.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:03,715 INFO L168 Benchmark]: BuchiAutomizer took 837.55 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 59.9 MB in the beginning and 76.0 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:07:03,715 INFO L168 Benchmark]: Witness Printer took 45.80 ms. Allocated memory is still 111.1 MB. Free memory was 76.0 MB in the beginning and 74.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:07:03,720 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 92.3 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 257.91 ms. Allocated memory is still 92.3 MB. Free memory was 61.8 MB in the beginning and 70.2 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.11 ms. Allocated memory is still 92.3 MB. Free memory was 70.2 MB in the beginning and 68.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.32 ms. Allocated memory is still 92.3 MB. Free memory was 68.9 MB in the beginning and 68.0 MB in the end (delta: 916.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 283.84 ms. Allocated memory is still 92.3 MB. Free memory was 68.0 MB in the beginning and 59.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 837.55 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 59.9 MB in the beginning and 76.0 MB in the end (delta: -16.1 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Witness Printer took 45.80 ms. Allocated memory is still 111.1 MB. Free memory was 76.0 MB in the beginning and 74.5 MB in the end (delta: 1.6 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 Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.7s and 1 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 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: 10]: 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 {x=0, y=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2e1c59fe=0, \result=0, \old(x)=0, NULL=0, n=0, \old(y)=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 10]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L17] int n = __VERIFIER_nondet_int(); [L18] COND FALSE !(!(n<=2147483646)) [L19] CALL rec(n, n + 1) Loop: [L11] COND TRUE x <= 23 && x >= -42 [L12] CALL rec(2*y-2, x + 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...