./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 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/RecursiveNonterminating-1.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 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 0.1.25-906a4fb [2020-10-19 18:40:29,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:40:29,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:40:29,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:40:29,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:40:29,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:40:29,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:40:29,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:40:29,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:40:29,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:40:29,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:40:29,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:40:29,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:40:29,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:40:29,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:40:29,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:40:29,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:40:29,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:40:29,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:40:29,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:40:29,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:40:29,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:40:29,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:40:29,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:40:29,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:40:29,439 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:40:29,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:40:29,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:40:29,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:40:29,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:40:29,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:40:29,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:40:29,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:40:29,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:40:29,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:40:29,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:40:29,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:40:29,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:40:29,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:40:29,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:40:29,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:40:29,455 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-19 18:40:29,505 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:40:29,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:40:29,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:40:29,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:40:29,508 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:40:29,508 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 18:40:29,509 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 18:40:29,509 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 18:40:29,509 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 18:40:29,509 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 18:40:29,510 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 18:40:29,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:40:29,511 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:40:29,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:40:29,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:40:29,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 18:40:29,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 18:40:29,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 18:40:29,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 18:40:29,513 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 18:40:29,513 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:40:29,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 18:40:29,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:40:29,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:40:29,515 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 18:40:29,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:40:29,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:40:29,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:40:29,516 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 18:40:29,518 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 18:40:29,518 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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 -> f21f1881350863de740f7b7321104b53617dd8ce [2020-10-19 18:40:29,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:40:29,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:40:29,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:40:29,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:40:29,865 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:40:29,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2020-10-19 18:40:29,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e7f2fe7/75a849e9161d4ab6b2eb3c5f71701b76/FLAGf138e1f1d [2020-10-19 18:40:30,380 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:40:30,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2020-10-19 18:40:30,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e7f2fe7/75a849e9161d4ab6b2eb3c5f71701b76/FLAGf138e1f1d [2020-10-19 18:40:30,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e7f2fe7/75a849e9161d4ab6b2eb3c5f71701b76 [2020-10-19 18:40:30,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:40:30,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 18:40:30,819 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:40:30,819 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:40:30,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:40:30,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:40:30" (1/1) ... [2020-10-19 18:40:30,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39cd557b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:30, skipping insertion in model container [2020-10-19 18:40:30,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:40:30" (1/1) ... [2020-10-19 18:40:30,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:40:30,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:40:31,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:40:31,097 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:40:31,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:40:31,131 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:40:31,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31 WrapperNode [2020-10-19 18:40:31,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:40:31,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 18:40:31,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 18:40:31,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 18:40:31,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (1/1) ... [2020-10-19 18:40:31,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (1/1) ... [2020-10-19 18:40:31,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 18:40:31,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:40:31,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:40:31,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:40:31,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (1/1) ... [2020-10-19 18:40:31,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (1/1) ... [2020-10-19 18:40:31,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (1/1) ... [2020-10-19 18:40:31,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (1/1) ... [2020-10-19 18:40:31,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (1/1) ... [2020-10-19 18:40:31,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (1/1) ... [2020-10-19 18:40:31,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (1/1) ... [2020-10-19 18:40:31,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:40:31,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:40:31,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:40:31,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:40:31,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (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 [2020-10-19 18:40:31,304 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2020-10-19 18:40:31,304 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2020-10-19 18:40:31,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:40:31,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:40:31,469 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:40:31,470 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-19 18:40:31,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:40:31 BoogieIcfgContainer [2020-10-19 18:40:31,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:40:31,472 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 18:40:31,472 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 18:40:31,476 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 18:40:31,477 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:40:31,477 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 06:40:30" (1/3) ... [2020-10-19 18:40:31,478 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@64f33092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:40:31, skipping insertion in model container [2020-10-19 18:40:31,479 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:40:31,479 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:40:31" (2/3) ... [2020-10-19 18:40:31,479 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@64f33092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 06:40:31, skipping insertion in model container [2020-10-19 18:40:31,479 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 18:40:31,479 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:40:31" (3/3) ... [2020-10-19 18:40:31,481 INFO L373 chiAutomizerObserver]: Analyzing ICFG RecursiveNonterminating-1.c [2020-10-19 18:40:31,534 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 18:40:31,534 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 18:40:31,534 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 18:40:31,534 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:40:31,534 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:40:31,534 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 18:40:31,535 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:40:31,535 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 18:40:31,551 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-10-19 18:40:31,576 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 18:40:31,576 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:31,576 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:31,583 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:40:31,584 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:40:31,584 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 18:40:31,584 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states. [2020-10-19 18:40:31,585 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-19 18:40:31,586 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 18:40:31,586 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 18:40:31,586 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 18:40:31,586 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-19 18:40:31,593 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~n~0;main_~n~0 := main_#t~nondet0;havoc main_#t~nondet0; 8#L18true assume !!(main_~n~0 <= 2147483646); 11#L19true call rec(main_~n~0, 1 + main_~n~0);< 3#recENTRYtrue [2020-10-19 18:40:31,593 INFO L796 eck$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 [2020-10-19 18:40:31,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash 39889, now seen corresponding path program 1 times [2020-10-19 18:40:31,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:31,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918711818] [2020-10-19 18:40:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:31,683 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:31,688 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:31,704 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash 29905, now seen corresponding path program 1 times [2020-10-19 18:40:31,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:31,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898524405] [2020-10-19 18:40:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:31,715 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:31,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:31,723 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:31,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:40:31,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1188333313, now seen corresponding path program 1 times [2020-10-19 18:40:31,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:40:31,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170498106] [2020-10-19 18:40:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:40:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:31,740 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:40:31,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:40:31,752 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:40:32,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 06:40:32 BoogieIcfgContainer [2020-10-19 18:40:32,018 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 18:40:32,018 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:40:32,019 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:40:32,019 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:40:32,020 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:40:31" (3/4) ... [2020-10-19 18:40:32,023 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-10-19 18:40:32,064 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:40:32,064 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:40:32,067 INFO L168 Benchmark]: Toolchain (without parser) took 1253.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 955.9 MB in the beginning and 1.1 GB in the end (delta: -121.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:32,068 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:40:32,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.04 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:32,071 INFO L168 Benchmark]: Boogie Procedure Inliner took 94.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -182.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:32,071 INFO L168 Benchmark]: Boogie Preprocessor took 18.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:40:32,072 INFO L168 Benchmark]: RCFGBuilder took 225.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:32,073 INFO L168 Benchmark]: BuchiAutomizer took 545.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.9 MB). Peak memory consumption was 32.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:40:32,074 INFO L168 Benchmark]: Witness Printer took 45.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:40:32,078 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 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 313.04 ms. Allocated memory is still 1.0 GB. Free memory was 955.9 MB in the beginning and 945.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 94.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 945.2 MB in the beginning and 1.1 GB in the end (delta: -182.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.79 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 225.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 545.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.9 MB). Peak memory consumption was 32.9 MB. Max. memory is 11.5 GB. * Witness Printer took 45.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 0.4s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.4s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: No data available LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 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@12538481=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...