./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc --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 d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:52:27,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:52:27,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:52:27,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:52:27,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:52:27,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:52:27,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:52:27,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:52:27,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:52:27,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:52:27,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:52:27,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:52:27,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:52:27,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:52:27,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:52:27,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:52:27,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:52:27,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:52:27,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:52:27,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:52:27,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:52:27,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:52:27,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:52:27,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:52:27,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:52:27,549 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:52:27,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:52:27,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:52:27,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:52:27,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:52:27,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:52:27,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:52:27,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:52:27,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:52:27,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:52:27,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:52:27,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:52:27,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:52:27,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:52:27,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:52:27,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:52:27,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-02 20:52:27,589 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:52:27,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:52:27,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:52:27,590 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:52:27,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:52:27,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:52:27,591 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:52:27,592 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-02 20:52:27,592 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-02 20:52:27,592 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-02 20:52:27,592 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-02 20:52:27,593 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-02 20:52:27,593 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-02 20:52:27,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:52:27,593 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:52:27,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:52:27,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:52:27,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-02 20:52:27,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-02 20:52:27,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-02 20:52:27,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:52:27,595 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-02 20:52:27,595 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:52:27,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-02 20:52:27,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:52:27,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:52:27,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:52:27,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:52:27,597 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-02 20:52:27,597 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_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a [2022-11-02 20:52:27,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:52:28,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:52:28,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:52:28,012 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:52:28,013 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:52:28,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2022-11-02 20:52:28,108 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/data/9c5d4dac6/3ec68e05ca6c4b778d4129b905b4e4ab/FLAG2cd7aa357 [2022-11-02 20:52:28,677 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:52:28,677 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2022-11-02 20:52:28,687 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/data/9c5d4dac6/3ec68e05ca6c4b778d4129b905b4e4ab/FLAG2cd7aa357 [2022-11-02 20:52:29,025 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/data/9c5d4dac6/3ec68e05ca6c4b778d4129b905b4e4ab [2022-11-02 20:52:29,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:52:29,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:52:29,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:52:29,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:52:29,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:52:29,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569e3d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29, skipping insertion in model container [2022-11-02 20:52:29,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:52:29,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:52:29,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:52:29,249 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:52:29,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:52:29,278 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:52:29,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29 WrapperNode [2022-11-02 20:52:29,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:52:29,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:52:29,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:52:29,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:52:29,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,300 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,317 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 9 [2022-11-02 20:52:29,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:52:29,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:52:29,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:52:29,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:52:29,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,334 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:52:29,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:52:29,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:52:29,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:52:29,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (1/1) ... [2022-11-02 20:52:29,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-02 20:52:29,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:29,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-02 20:52:29,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-02 20:52:29,413 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2022-11-02 20:52:29,414 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2022-11-02 20:52:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2022-11-02 20:52:29,414 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2022-11-02 20:52:29,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:52:29,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:52:29,478 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:52:29,481 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:52:29,638 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:52:29,662 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:52:29,662 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-02 20:52:29,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:29 BoogieIcfgContainer [2022-11-02 20:52:29,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:52:29,666 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-02 20:52:29,666 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-02 20:52:29,676 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-02 20:52:29,677 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-02 20:52:29,677 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 02.11 08:52:29" (1/3) ... [2022-11-02 20:52:29,679 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@37f74ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.11 08:52:29, skipping insertion in model container [2022-11-02 20:52:29,679 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-02 20:52:29,679 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:52:29" (2/3) ... [2022-11-02 20:52:29,679 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@37f74ca6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.11 08:52:29, skipping insertion in model container [2022-11-02 20:52:29,679 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-02 20:52:29,680 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:29" (3/3) ... [2022-11-02 20:52:29,681 INFO L332 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2022-11-02 20:52:29,792 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-02 20:52:29,793 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-02 20:52:29,793 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-02 20:52:29,793 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-02 20:52:29,793 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-02 20:52:29,793 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-02 20:52:29,793 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-02 20:52:29,794 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-02 20:52:29,823 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:52:29,862 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-02 20:52:29,863 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:52:29,863 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:52:29,870 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-11-02 20:52:29,870 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:29,871 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-02 20:52:29,871 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:52:29,874 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-02 20:52:29,875 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:52:29,875 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:52:29,876 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-11-02 20:52:29,876 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:29,884 INFO L748 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 13#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 12#L26true assume !!(main_~x~0#1 <= 2147483646); 7#L27true call main_#t~ret6#1 := rec2(main_~x~0#1);< 16#rec2ENTRYtrue [2022-11-02 20:52:29,884 INFO L750 eck$LassoCheckResult]: Loop: 16#rec2ENTRYtrue ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(1 + ~j);< 22#rec1ENTRYtrue ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 14#rec1FINALtrue assume true; 15#rec1EXITtrue >#39#return; 3#L20-1true call #t~ret4 := rec2(#t~ret3);< 16#rec2ENTRYtrue [2022-11-02 20:52:29,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:29,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 1 times [2022-11-02 20:52:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:29,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580777803] [2022-11-02 20:52:29,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:30,011 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:30,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash -931063642, now seen corresponding path program 1 times [2022-11-02 20:52:30,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:30,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145576295] [2022-11-02 20:52:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:30,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:30,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:52:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:30,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145576295] [2022-11-02 20:52:30,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145576295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:52:30,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:52:30,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:52:30,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664960061] [2022-11-02 20:52:30,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:52:30,386 INFO L765 eck$LassoCheckResult]: loop already infeasible [2022-11-02 20:52:30,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:30,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:52:30,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:52:30,436 INFO L87 Difference]: Start difference. First operand has 23 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 20:52:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:30,548 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-11-02 20:52:30,549 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 36 transitions. [2022-11-02 20:52:30,553 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-02 20:52:30,559 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 18 states and 24 transitions. [2022-11-02 20:52:30,561 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2022-11-02 20:52:30,561 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-11-02 20:52:30,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2022-11-02 20:52:30,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:52:30,564 INFO L218 hiAutomatonCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-02 20:52:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2022-11-02 20:52:30,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-02 20:52:30,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-02 20:52:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-02 20:52:30,592 INFO L240 hiAutomatonCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-02 20:52:30,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:52:30,598 INFO L428 stractBuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-02 20:52:30,601 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-02 20:52:30,601 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 24 transitions. [2022-11-02 20:52:30,602 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2022-11-02 20:52:30,603 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-02 20:52:30,603 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-02 20:52:30,604 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2022-11-02 20:52:30,604 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:30,604 INFO L748 eck$LassoCheckResult]: Stem: 70#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 71#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 79#L26 assume !!(main_~x~0#1 <= 2147483646); 68#L27 call main_#t~ret6#1 := rec2(main_~x~0#1);< 69#rec2ENTRY [2022-11-02 20:52:30,605 INFO L750 eck$LassoCheckResult]: Loop: 69#rec2ENTRY ~j := #in~j; 82#L18 assume !(~j <= 0); 73#L20 call #t~ret3 := rec1(1 + ~j);< 78#rec1ENTRY ~i := #in~i; 83#L12 assume !(~i <= 0); 74#L14 call #t~ret0 := rec1(~i - 2);< 78#rec1ENTRY ~i := #in~i; 83#L12 assume ~i <= 0;#res := 0; 80#rec1FINAL assume true; 81#rec1EXIT >#33#return; 75#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 78#rec1ENTRY ~i := #in~i; 83#L12 assume ~i <= 0;#res := 0; 80#rec1FINAL assume true; 81#rec1EXIT >#35#return; 76#L14-2 call #t~ret2 := rec1(#t~ret1);< 78#rec1ENTRY ~i := #in~i; 83#L12 assume ~i <= 0;#res := 0; 80#rec1FINAL assume true; 81#rec1EXIT >#37#return; 72#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 77#rec1FINAL assume true; 84#rec1EXIT >#39#return; 67#L20-1 call #t~ret4 := rec2(#t~ret3);< 69#rec2ENTRY [2022-11-02 20:52:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 2 times [2022-11-02 20:52:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:30,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596058415] [2022-11-02 20:52:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:30,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:30,611 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:30,615 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:30,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1852060604, now seen corresponding path program 1 times [2022-11-02 20:52:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:30,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451095575] [2022-11-02 20:52:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:30,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:30,633 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:30,656 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2035496338, now seen corresponding path program 1 times [2022-11-02 20:52:30,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:30,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247240662] [2022-11-02 20:52:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:30,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:30,698 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:30,718 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:52:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:31,361 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:52:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:52:31,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 02.11 08:52:31 BoogieIcfgContainer [2022-11-02 20:52:31,398 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-02 20:52:31,398 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:52:31,398 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:52:31,399 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:52:31,399 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:52:29" (3/4) ... [2022-11-02 20:52:31,402 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2022-11-02 20:52:31,443 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/witness.graphml [2022-11-02 20:52:31,443 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:52:31,444 INFO L158 Benchmark]: Toolchain (without parser) took 2412.70ms. Allocated memory is still 123.7MB. Free memory was 90.0MB in the beginning and 84.8MB in the end (delta: 5.2MB). Peak memory consumption was 3.7MB. Max. memory is 16.1GB. [2022-11-02 20:52:31,444 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 83.9MB. Free memory was 58.9MB in the beginning and 58.9MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:52:31,445 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.66ms. Allocated memory is still 123.7MB. Free memory was 90.0MB in the beginning and 101.5MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:52:31,446 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.34ms. Allocated memory is still 123.7MB. Free memory was 101.5MB in the beginning and 100.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:52:31,446 INFO L158 Benchmark]: Boogie Preprocessor took 17.17ms. Allocated memory is still 123.7MB. Free memory was 100.0MB in the beginning and 99.3MB in the end (delta: 646.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:52:31,447 INFO L158 Benchmark]: RCFGBuilder took 327.52ms. Allocated memory is still 123.7MB. Free memory was 99.3MB in the beginning and 90.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:52:31,447 INFO L158 Benchmark]: BuchiAutomizer took 1732.10ms. Allocated memory is still 123.7MB. Free memory was 90.1MB in the beginning and 86.9MB in the end (delta: 3.2MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. [2022-11-02 20:52:31,448 INFO L158 Benchmark]: Witness Printer took 44.81ms. Allocated memory is still 123.7MB. Free memory was 86.9MB in the beginning and 84.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:52:31,451 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 83.9MB. Free memory was 58.9MB in the beginning and 58.9MB in the end (delta: 28.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 246.66ms. Allocated memory is still 123.7MB. Free memory was 90.0MB in the beginning and 101.5MB in the end (delta: -11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.34ms. Allocated memory is still 123.7MB. Free memory was 101.5MB in the beginning and 100.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.17ms. Allocated memory is still 123.7MB. Free memory was 100.0MB in the beginning and 99.3MB in the end (delta: 646.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 327.52ms. Allocated memory is still 123.7MB. Free memory was 99.3MB in the beginning and 90.1MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 1732.10ms. Allocated memory is still 123.7MB. Free memory was 90.1MB in the beginning and 86.9MB in the end (delta: 3.2MB). Peak memory consumption was 4.5MB. Max. memory is 16.1GB. * Witness Printer took 44.81ms. Allocated memory is still 123.7MB. Free memory was 86.9MB in the beginning and 84.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 18 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.6s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 1.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.1s. 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 -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 81 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 55 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32 IncrementalHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 26 mSDtfsCounter, 32 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown 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 InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - LassoShapedNonTerminationArgument [Line: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite program execution. Stem: [L24] int x = __VERIFIER_nondet_int(); [L26] COND FALSE !(!(x<=2147483646)) VAL [x=1] [L27] CALL rec2(x) VAL [\old(j)=1] 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. - 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)) VAL [x=1] [L27] CALL rec2(x) VAL [\old(j)=1] 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! [2022-11-02 20:52:31,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ca101b1-c827-45d0-ab9c-5787e1dbadc7/bin/uautomizer-Dbtcem3rbc/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)