./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 ce492abcc29ddbc9795671b095b6bfaf5bfc547b ...................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-5485861 [2020-10-26 04:13:47,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 04:13:47,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 04:13:47,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 04:13:47,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 04:13:47,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 04:13:47,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 04:13:47,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 04:13:47,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 04:13:47,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 04:13:47,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 04:13:47,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 04:13:47,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 04:13:47,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 04:13:47,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 04:13:47,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 04:13:47,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 04:13:47,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 04:13:47,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 04:13:47,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 04:13:47,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 04:13:47,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 04:13:47,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 04:13:47,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 04:13:47,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 04:13:47,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 04:13:47,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 04:13:47,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 04:13:47,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 04:13:47,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 04:13:47,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 04:13:47,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 04:13:47,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 04:13:47,938 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 04:13:47,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 04:13:47,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 04:13:47,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 04:13:47,944 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 04:13:47,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 04:13:47,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 04:13:47,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 04:13:47,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-26 04:13:48,014 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 04:13:48,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 04:13:48,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 04:13:48,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 04:13:48,020 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 04:13:48,020 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-26 04:13:48,020 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-26 04:13:48,021 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-26 04:13:48,021 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-26 04:13:48,021 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-26 04:13:48,023 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-26 04:13:48,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 04:13:48,023 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-26 04:13:48,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 04:13:48,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 04:13:48,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-26 04:13:48,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-26 04:13:48,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-26 04:13:48,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 04:13:48,025 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-26 04:13:48,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 04:13:48,026 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-26 04:13:48,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 04:13:48,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 04:13:48,026 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-26 04:13:48,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 04:13:48,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 04:13:48,027 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 04:13:48,027 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-26 04:13:48,029 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-26 04:13:48,029 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce492abcc29ddbc9795671b095b6bfaf5bfc547b [2020-10-26 04:13:48,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 04:13:48,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 04:13:48,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 04:13:48,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 04:13:48,480 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 04:13:48,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2020-10-26 04:13:48,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e337fc93/41e7eb3f4a0a4c3788da003dd672a5ed/FLAGec7aef8d2 [2020-10-26 04:13:49,169 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 04:13:49,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2020-10-26 04:13:49,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e337fc93/41e7eb3f4a0a4c3788da003dd672a5ed/FLAGec7aef8d2 [2020-10-26 04:13:49,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e337fc93/41e7eb3f4a0a4c3788da003dd672a5ed [2020-10-26 04:13:49,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 04:13:49,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-26 04:13:49,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 04:13:49,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 04:13:49,553 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 04:13:49,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bceb8f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49, skipping insertion in model container [2020-10-26 04:13:49,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 04:13:49,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 04:13:49,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:13:49,774 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 04:13:49,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 04:13:49,803 INFO L208 MainTranslator]: Completed translation [2020-10-26 04:13:49,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49 WrapperNode [2020-10-26 04:13:49,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 04:13:49,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-26 04:13:49,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-26 04:13:49,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-26 04:13:49,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,839 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-26 04:13:49,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 04:13:49,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 04:13:49,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 04:13:49,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... [2020-10-26 04:13:49,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 04:13:49,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 04:13:49,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 04:13:49,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 04:13:49,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-26 04:13:49,933 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-10-26 04:13:49,934 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-10-26 04:13:49,935 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-10-26 04:13:49,935 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-10-26 04:13:49,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 04:13:49,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 04:13:50,101 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 04:13:50,101 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 04:13:50,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:13:50 BoogieIcfgContainer [2020-10-26 04:13:50,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 04:13:50,105 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-26 04:13:50,105 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-26 04:13:50,109 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-26 04:13:50,110 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:13:50,110 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 26.10 04:13:49" (1/3) ... [2020-10-26 04:13:50,112 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4257c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:13:50, skipping insertion in model container [2020-10-26 04:13:50,112 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:13:50,112 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 04:13:49" (2/3) ... [2020-10-26 04:13:50,112 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4257c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 26.10 04:13:50, skipping insertion in model container [2020-10-26 04:13:50,113 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-26 04:13:50,113 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:13:50" (3/3) ... [2020-10-26 04:13:50,114 INFO L373 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2020-10-26 04:13:50,170 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-26 04:13:50,171 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-26 04:13:50,171 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-26 04:13:50,171 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 04:13:50,171 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 04:13:50,171 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-26 04:13:50,172 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 04:13:50,172 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-26 04:13:50,192 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-10-26 04:13:50,233 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:50,233 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:13:50,233 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:13:50,247 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-26 04:13:50,247 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:50,247 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-26 04:13:50,247 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2020-10-26 04:13:50,251 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:50,252 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:13:50,252 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:13:50,252 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-26 04:13:50,253 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:50,262 INFO L794 eck$LassoCheckResult]: Stem: 16#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3#L26true assume !!(main_~x~0 <= 2147483646); 6#L27true call main_#t~ret6 := rec2(main_~x~0);< 5#rec2ENTRYtrue [2020-10-26 04:13:50,263 INFO L796 eck$LassoCheckResult]: Loop: 5#rec2ENTRYtrue ~j := #in~j; 22#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(1 + ~j);< 7#rec1ENTRYtrue ~i := #in~i; 12#L12true assume ~i <= 0;#res := 0; 8#rec1FINALtrue assume true; 15#rec1EXITtrue >#38#return; 24#L20-1true call #t~ret4 := rec2(#t~ret3);< 5#rec2ENTRYtrue [2020-10-26 04:13:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:50,270 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 1 times [2020-10-26 04:13:50,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:50,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285207652] [2020-10-26 04:13:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:50,402 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:50,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:50,428 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash -959692825, now seen corresponding path program 1 times [2020-10-26 04:13:50,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:50,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591768650] [2020-10-26 04:13:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:50,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-26 04:13:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 04:13:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 04:13:50,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591768650] [2020-10-26 04:13:50,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 04:13:50,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 04:13:50,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332949587] [2020-10-26 04:13:50,566 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-26 04:13:50,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-26 04:13:50,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 04:13:50,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 04:13:50,589 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2020-10-26 04:13:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 04:13:50,690 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2020-10-26 04:13:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 04:13:50,693 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 35 transitions. [2020-10-26 04:13:50,698 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:50,709 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2020-10-26 04:13:50,712 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-26 04:13:50,713 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-10-26 04:13:50,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2020-10-26 04:13:50,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-26 04:13:50,718 INFO L691 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-10-26 04:13:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2020-10-26 04:13:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-26 04:13:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-26 04:13:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2020-10-26 04:13:50,765 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-10-26 04:13:50,765 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2020-10-26 04:13:50,766 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-26 04:13:50,766 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2020-10-26 04:13:50,772 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2020-10-26 04:13:50,772 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-26 04:13:50,773 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-26 04:13:50,775 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-26 04:13:50,775 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 04:13:50,775 INFO L794 eck$LassoCheckResult]: Stem: 80#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 65#L26 assume !!(main_~x~0 <= 2147483646); 66#L27 call main_#t~ret6 := rec2(main_~x~0);< 67#rec2ENTRY [2020-10-26 04:13:50,776 INFO L796 eck$LassoCheckResult]: Loop: 67#rec2ENTRY ~j := #in~j; 69#L18 assume !(~j <= 0); 74#L20 call #t~ret3 := rec1(1 + ~j);< 70#rec1ENTRY ~i := #in~i; 75#L12 assume !(~i <= 0); 71#L14 call #t~ret0 := rec1(~i - 2);< 70#rec1ENTRY ~i := #in~i; 75#L12 assume ~i <= 0;#res := 0; 76#rec1FINAL assume true; 77#rec1EXIT >#32#return; 72#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 70#rec1ENTRY ~i := #in~i; 75#L12 assume ~i <= 0;#res := 0; 76#rec1FINAL assume true; 77#rec1EXIT >#34#return; 73#L14-2 call #t~ret2 := rec1(#t~ret1);< 70#rec1ENTRY ~i := #in~i; 75#L12 assume ~i <= 0;#res := 0; 76#rec1FINAL assume true; 77#rec1EXIT >#36#return; 78#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 79#rec1FINAL assume true; 81#rec1EXIT >#38#return; 68#L20-1 call #t~ret4 := rec2(#t~ret3);< 67#rec2ENTRY [2020-10-26 04:13:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:50,780 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 2 times [2020-10-26 04:13:50,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:50,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410442266] [2020-10-26 04:13:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:50,797 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:50,803 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:50,808 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:50,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1440672699, now seen corresponding path program 1 times [2020-10-26 04:13:50,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:50,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232339125] [2020-10-26 04:13:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:50,863 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:50,899 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:50,911 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:50,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 04:13:50,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1765119907, now seen corresponding path program 1 times [2020-10-26 04:13:50,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-26 04:13:50,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487154815] [2020-10-26 04:13:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 04:13:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:50,949 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-26 04:13:50,978 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-26 04:13:50,987 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-26 04:13:51,306 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-26 04:13:51,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 26.10 04:13:51 BoogieIcfgContainer [2020-10-26 04:13:51,511 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-26 04:13:51,512 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-26 04:13:51,512 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-26 04:13:51,512 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-26 04:13:51,513 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 04:13:50" (3/4) ... [2020-10-26 04:13:51,516 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-26 04:13:51,559 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-26 04:13:51,559 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-26 04:13:51,561 INFO L168 Benchmark]: Toolchain (without parser) took 2036.00 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 21.3 MB in the beginning and 47.4 MB in the end (delta: -26.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:13:51,562 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 44.0 MB. Free memory was 26.9 MB in the beginning and 26.8 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:13:51,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.25 ms. Allocated memory is still 44.0 MB. Free memory was 20.6 MB in the beginning and 21.5 MB in the end (delta: -887.6 kB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-10-26 04:13:51,563 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.27 ms. Allocated memory is still 44.0 MB. Free memory was 21.5 MB in the beginning and 20.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:13:51,564 INFO L168 Benchmark]: Boogie Preprocessor took 17.58 ms. Allocated memory is still 44.0 MB. Free memory was 20.2 MB in the beginning and 19.4 MB in the end (delta: 746.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-26 04:13:51,564 INFO L168 Benchmark]: RCFGBuilder took 239.46 ms. Allocated memory is still 54.5 MB. Free memory was 39.6 MB in the beginning and 30.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-26 04:13:51,565 INFO L168 Benchmark]: BuchiAutomizer took 1406.32 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.4 MB in the beginning and 49.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2020-10-26 04:13:51,566 INFO L168 Benchmark]: Witness Printer took 47.64 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 47.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-26 04:13:51,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 44.0 MB. Free memory was 26.9 MB in the beginning and 26.8 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.25 ms. Allocated memory is still 44.0 MB. Free memory was 20.6 MB in the beginning and 21.5 MB in the end (delta: -887.6 kB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.27 ms. Allocated memory is still 44.0 MB. Free memory was 21.5 MB in the beginning and 20.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.58 ms. Allocated memory is still 44.0 MB. Free memory was 20.2 MB in the beginning and 19.4 MB in the end (delta: 746.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 239.46 ms. Allocated memory is still 54.5 MB. Free memory was 39.6 MB in the beginning and 30.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 1406.32 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.4 MB in the beginning and 49.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * Witness Printer took 47.64 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 47.4 MB in the end (delta: 1.7 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 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 5 locations. The remainder module has 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.3s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 1.0s. 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 17 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 25 SDtfs, 7 SDslu, 53 SDs, 0 SdLazy, 31 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI1 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: 17]: 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 {NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3c1eae14=0, \old(j)=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@730a087d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@b4d6451=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@18ae834f=0, j=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 17]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L24] int x = __VERIFIER_nondet_int(); [L26] COND FALSE !(!(x<=2147483646)) [L27] CALL rec2(x) Loop: [L18] COND FALSE !(j <= 0) [L20] CALL, EXPR rec1(j+1) [L12] COND FALSE !(i <= 0) [L14] CALL, EXPR rec1(i-2) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(i-2) [L14] CALL, EXPR rec1(rec1(i-2) - 1) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(i-2) - 1) [L14] CALL, EXPR rec1(rec1(rec1(i-2) - 1)) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(rec1(i-2) - 1)) [L14] return rec1(rec1(rec1(i-2) - 1)) + 1; [L20] RET, EXPR rec1(j+1) [L20] CALL rec2(rec1(j+1)) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...