./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 f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX --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 fc6cfc9bc139db752e72885619d5342f9725bf67cec8b7ca9da9022c75c17b44 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:29:52,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:29:52,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:29:52,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:29:52,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:29:52,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:29:52,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:29:52,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:29:52,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:29:52,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:29:52,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:29:52,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:29:52,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:29:52,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:29:52,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:29:52,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:29:52,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:29:52,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:29:52,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:29:52,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:29:52,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:29:52,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:29:52,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:29:52,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:29:52,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:29:52,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:29:52,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:29:52,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:29:52,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:29:52,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:29:52,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:29:52,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:29:52,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:29:52,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:29:52,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:29:52,679 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:29:52,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:29:52,680 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:29:52,680 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:29:52,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:29:52,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:29:52,683 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-09 08:29:52,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:29:52,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:29:52,729 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:29:52,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:29:52,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:29:52,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:29:52,732 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:29:52,732 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-09 08:29:52,733 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-09 08:29:52,733 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-09 08:29:52,734 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-09 08:29:52,734 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-09 08:29:52,735 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-09 08:29:52,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:29:52,735 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:29:52,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:29:52,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:29:52,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-09 08:29:52,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-09 08:29:52,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-09 08:29:52,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:29:52,737 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-09 08:29:52,737 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:29:52,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-09 08:29:52,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:29:52,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:29:52,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:29:52,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:29:52,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:29:52,739 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-09 08:29:52,740 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_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc6cfc9bc139db752e72885619d5342f9725bf67cec8b7ca9da9022c75c17b44 [2021-11-09 08:29:53,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:29:53,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:29:53,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:29:53,077 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:29:53,078 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:29:53,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2021-11-09 08:29:53,144 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/data/18bfe9de2/d3b9fa159bc645878cbd57c4f18d0032/FLAG8feaaa86c [2021-11-09 08:29:53,647 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:29:53,650 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/sv-benchmarks/c/termination-crafted/RecursiveNonterminating-1.c [2021-11-09 08:29:53,658 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/data/18bfe9de2/d3b9fa159bc645878cbd57c4f18d0032/FLAG8feaaa86c [2021-11-09 08:29:54,029 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/data/18bfe9de2/d3b9fa159bc645878cbd57c4f18d0032 [2021-11-09 08:29:54,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:29:54,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:29:54,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:54,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:29:54,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:29:54,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58ce49e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54, skipping insertion in model container [2021-11-09 08:29:54,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:29:54,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:29:54,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:54,267 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:29:54,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:54,292 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:29:54,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54 WrapperNode [2021-11-09 08:29:54,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:54,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:29:54,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:29:54,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:29:54,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,309 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:29:54,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:29:54,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:29:54,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:29:54,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:29:54,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:29:54,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:29:54,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:29:54,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (1/1) ... [2021-11-09 08:29:54,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:29:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:54,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:29:54,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-09 08:29:54,471 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-11-09 08:29:54,472 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-11-09 08:29:54,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:29:54,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:29:54,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:29:54,650 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 08:29:54,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:29:54 BoogieIcfgContainer [2021-11-09 08:29:54,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:29:54,655 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-09 08:29:54,655 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-09 08:29:54,659 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-09 08:29:54,660 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-09 08:29:54,660 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 09.11 08:29:54" (1/3) ... [2021-11-09 08:29:54,663 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@41803d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 08:29:54, skipping insertion in model container [2021-11-09 08:29:54,663 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-09 08:29:54,663 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:54" (2/3) ... [2021-11-09 08:29:54,664 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@41803d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 08:29:54, skipping insertion in model container [2021-11-09 08:29:54,664 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-09 08:29:54,664 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:29:54" (3/3) ... [2021-11-09 08:29:54,666 INFO L389 chiAutomizerObserver]: Analyzing ICFG RecursiveNonterminating-1.c [2021-11-09 08:29:54,723 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-09 08:29:54,724 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-09 08:29:54,724 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-09 08:29:54,724 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-09 08:29:54,724 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-09 08:29:54,724 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-09 08:29:54,725 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-09 08:29:54,725 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-09 08:29:54,741 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:29:54,765 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:29:54,766 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:29:54,766 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:29:54,774 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-09 08:29:54,774 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-09 08:29:54,774 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-09 08:29:54,774 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 08:29:54,776 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:29:54,776 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:29:54,777 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:29:54,777 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-09 08:29:54,777 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-09 08:29:54,785 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~n~0;main_~n~0 := main_#t~nondet0;havoc main_#t~nondet0; 5#L18true assume !!(main_~n~0 <= 2147483646); 11#L19true call rec(main_~n~0, 1 + main_~n~0);< 9#recENTRYtrue [2021-11-09 08:29:54,785 INFO L793 eck$LassoCheckResult]: Loop: 9#recENTRYtrue ~x := #in~x;~y := #in~y; 4#L11true assume ~x <= 23 && ~x >= -42; 7#L12true call rec(2 * ~y - 2, 1 + ~x);< 9#recENTRYtrue [2021-11-09 08:29:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 39889, now seen corresponding path program 1 times [2021-11-09 08:29:54,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:54,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006537367] [2021-11-09 08:29:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:54,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:29:54,887 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:29:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:29:54,909 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:29:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:54,913 INFO L85 PathProgramCache]: Analyzing trace with hash 29905, now seen corresponding path program 1 times [2021-11-09 08:29:54,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:54,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884136611] [2021-11-09 08:29:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:54,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:29:54,923 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:29:54,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:29:54,931 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:29:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1188333313, now seen corresponding path program 1 times [2021-11-09 08:29:54,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:29:54,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829526161] [2021-11-09 08:29:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:54,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:29:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:29:54,951 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:29:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:29:54,990 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:29:55,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.11 08:29:55 BoogieIcfgContainer [2021-11-09 08:29:55,358 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-09 08:29:55,359 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 08:29:55,359 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 08:29:55,360 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 08:29:55,360 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:29:54" (3/4) ... [2021-11-09 08:29:55,363 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-11-09 08:29:55,400 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 08:29:55,401 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 08:29:55,403 INFO L168 Benchmark]: Toolchain (without parser) took 1368.45 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 54.8 MB in the beginning and 79.6 MB in the end (delta: -24.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:29:55,404 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 92.3 MB. Free memory is still 71.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:29:55,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.83 ms. Allocated memory is still 92.3 MB. Free memory was 54.5 MB in the beginning and 70.7 MB in the end (delta: -16.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-11-09 08:29:55,406 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.46 ms. Allocated memory is still 92.3 MB. Free memory was 70.7 MB in the beginning and 69.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:29:55,413 INFO L168 Benchmark]: Boogie Preprocessor took 31.78 ms. Allocated memory is still 92.3 MB. Free memory was 69.4 MB in the beginning and 68.6 MB in the end (delta: 835.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:29:55,414 INFO L168 Benchmark]: RCFGBuilder took 285.43 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 60.7 MB in the end (delta: 7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 08:29:55,415 INFO L168 Benchmark]: BuchiAutomizer took 703.78 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 60.7 MB in the beginning and 81.3 MB in the end (delta: -20.6 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2021-11-09 08:29:55,416 INFO L168 Benchmark]: Witness Printer took 41.98 ms. Allocated memory is still 111.1 MB. Free memory was 80.9 MB in the beginning and 79.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:29:55,422 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 92.3 MB. Free memory is still 71.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 258.83 ms. Allocated memory is still 92.3 MB. Free memory was 54.5 MB in the beginning and 70.7 MB in the end (delta: -16.2 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.46 ms. Allocated memory is still 92.3 MB. Free memory was 70.7 MB in the beginning and 69.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.78 ms. Allocated memory is still 92.3 MB. Free memory was 69.4 MB in the beginning and 68.6 MB in the end (delta: 835.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 285.43 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 60.7 MB in the end (delta: 7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 703.78 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 60.7 MB in the beginning and 81.3 MB in the end (delta: -20.6 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. * Witness Printer took 41.98 ms. Allocated memory is still 111.1 MB. Free memory was 80.9 MB in the beginning and 79.6 MB in the end (delta: 1.3 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 0.6s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 0.5s. 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@281b8ac4=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! [2021-11-09 08:29:55,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e634f31f-6eba-4ebb-bd90-3f932e676593/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)