./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ce492abcc29ddbc9795671b095b6bfaf5bfc547b .......................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:52:08,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:52:08,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:52:08,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:52:08,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:52:08,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:52:08,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:52:08,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:52:08,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:52:08,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:52:08,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:52:08,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:52:08,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:52:08,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:52:08,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:52:08,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:52:08,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:52:08,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:52:08,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:52:08,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:52:08,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:52:08,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:52:08,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:52:08,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:52:08,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:52:08,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:52:08,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:52:08,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:52:08,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:52:08,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:52:08,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:52:08,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:52:08,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:52:08,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:52:08,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:52:08,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:52:08,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:52:08,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:52:08,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:52:08,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:52:08,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:52:08,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-15 19:52:09,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:52:09,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:52:09,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:52:09,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:52:09,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:52:09,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:52:09,029 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:52:09,030 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-15 19:52:09,030 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-15 19:52:09,030 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-15 19:52:09,031 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-15 19:52:09,031 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-15 19:52:09,031 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-15 19:52:09,032 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:52:09,032 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 19:52:09,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:52:09,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:52:09,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-15 19:52:09,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-15 19:52:09,034 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-15 19:52:09,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:52:09,034 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-15 19:52:09,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:52:09,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-15 19:52:09,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:52:09,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:52:09,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:52:09,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:52:09,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:52:09,038 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-15 19:52:09,038 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_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce492abcc29ddbc9795671b095b6bfaf5bfc547b [2021-10-15 19:52:09,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:52:09,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:52:09,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:52:09,361 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:52:09,362 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:52:09,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2021-10-15 19:52:09,473 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/data/0cc361683/3a9e3a00e68741868b0b24b49316d9dc/FLAG005ac23ee [2021-10-15 19:52:10,109 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:52:10,109 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2021-10-15 19:52:10,116 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/data/0cc361683/3a9e3a00e68741868b0b24b49316d9dc/FLAG005ac23ee [2021-10-15 19:52:10,497 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/data/0cc361683/3a9e3a00e68741868b0b24b49316d9dc [2021-10-15 19:52:10,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:52:10,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:52:10,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:52:10,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:52:10,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:52:10,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c491040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10, skipping insertion in model container [2021-10-15 19:52:10,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:52:10,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:52:10,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:52:10,768 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:52:10,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:52:10,817 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:52:10,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10 WrapperNode [2021-10-15 19:52:10,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:52:10,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:52:10,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:52:10,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:52:10,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:52:10,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:52:10,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:52:10,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:52:10,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,871 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:52:10,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:52:10,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:52:10,885 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:52:10,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (1/1) ... [2021-10-15 19:52:10,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-15 19:52:10,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:52:10,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-15 19:52:10,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-15 19:52:10,979 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-10-15 19:52:10,980 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-10-15 19:52:10,980 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-10-15 19:52:10,980 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-10-15 19:52:10,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:52:10,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:52:11,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:52:11,160 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-15 19:52:11,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:11 BoogieIcfgContainer [2021-10-15 19:52:11,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:52:11,164 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-15 19:52:11,164 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-15 19:52:11,168 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-15 19:52:11,169 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 19:52:11,170 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.10 07:52:10" (1/3) ... [2021-10-15 19:52:11,171 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@77e60ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.10 07:52:11, skipping insertion in model container [2021-10-15 19:52:11,172 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 19:52:11,172 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:10" (2/3) ... [2021-10-15 19:52:11,172 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@77e60ae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.10 07:52:11, skipping insertion in model container [2021-10-15 19:52:11,173 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-15 19:52:11,173 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:11" (3/3) ... [2021-10-15 19:52:11,175 INFO L389 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2021-10-15 19:52:11,231 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-15 19:52:11,232 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-15 19:52:11,232 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-15 19:52:11,232 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-15 19:52:11,232 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-15 19:52:11,233 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-15 19:52:11,233 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-15 19:52:11,233 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-15 19:52:11,253 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-10-15 19:52:11,299 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-15 19:52:11,300 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:52:11,300 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:52:11,309 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-15 19:52:11,309 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:52:11,310 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-15 19:52:11,310 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-10-15 19:52:11,316 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-15 19:52:11,317 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:52:11,317 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:52:11,318 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-15 19:52:11,318 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:52:11,327 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 13#L26true assume !!(main_~x~0 <= 2147483646); 8#L27true call main_#t~ret6 := rec2(main_~x~0);< 16#rec2ENTRYtrue [2021-10-15 19:52:11,328 INFO L793 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 >#38#return; 4#L20-1true call #t~ret4 := rec2(#t~ret3);< 16#rec2ENTRYtrue [2021-10-15 19:52:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:52:11,335 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 1 times [2021-10-15 19:52:11,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:52:11,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554255431] [2021-10-15 19:52:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:52:11,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:52:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:52:11,487 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:52:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:52:11,512 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:52:11,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:52:11,516 INFO L82 PathProgramCache]: Analyzing trace with hash -959692825, now seen corresponding path program 1 times [2021-10-15 19:52:11,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:52:11,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782955219] [2021-10-15 19:52:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:52:11,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:52:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:52:11,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-15 19:52:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:52:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:52:11,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:52:11,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782955219] [2021-10-15 19:52:11,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782955219] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:52:11,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:52:11,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:52:11,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015395835] [2021-10-15 19:52:11,672 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-15 19:52:11,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:52:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:52:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:52:11,711 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-10-15 19:52:11,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 19:52:11,880 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2021-10-15 19:52:11,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:52:11,884 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 35 transitions. [2021-10-15 19:52:11,889 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-15 19:52:11,907 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2021-10-15 19:52:11,908 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-10-15 19:52:11,911 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2021-10-15 19:52:11,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2021-10-15 19:52:11,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:52:11,914 INFO L681 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-15 19:52:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2021-10-15 19:52:11,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-15 19:52:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 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) [2021-10-15 19:52:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-10-15 19:52:11,947 INFO L704 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-15 19:52:11,947 INFO L587 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-15 19:52:11,947 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-15 19:52:11,948 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2021-10-15 19:52:11,949 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-10-15 19:52:11,949 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-15 19:52:11,950 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-15 19:52:11,951 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-15 19:52:11,951 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:52:11,952 INFO L791 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 69#L26 assume !!(main_~x~0 <= 2147483646); 66#L27 call main_#t~ret6 := rec2(main_~x~0);< 67#rec2ENTRY [2021-10-15 19:52:11,952 INFO L793 eck$LassoCheckResult]: Loop: 67#rec2ENTRY ~j := #in~j; 79#L18 assume !(~j <= 0); 73#L20 call #t~ret3 := rec1(1 + ~j);< 76#rec1ENTRY ~i := #in~i; 80#L12 assume !(~i <= 0); 74#L14 call #t~ret0 := rec1(~i - 2);< 76#rec1ENTRY ~i := #in~i; 80#L12 assume ~i <= 0;#res := 0; 77#rec1FINAL assume true; 78#rec1EXIT >#32#return; 71#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 76#rec1ENTRY ~i := #in~i; 80#L12 assume ~i <= 0;#res := 0; 77#rec1FINAL assume true; 78#rec1EXIT >#34#return; 72#L14-2 call #t~ret2 := rec1(#t~ret1);< 76#rec1ENTRY ~i := #in~i; 80#L12 assume ~i <= 0;#res := 0; 77#rec1FINAL assume true; 78#rec1EXIT >#36#return; 70#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 75#rec1FINAL assume true; 81#rec1EXIT >#38#return; 65#L20-1 call #t~ret4 := rec2(#t~ret3);< 67#rec2ENTRY [2021-10-15 19:52:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:52:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash 49827, now seen corresponding path program 2 times [2021-10-15 19:52:11,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:52:11,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563294306] [2021-10-15 19:52:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:52:11,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:52:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:52:11,960 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:52:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:52:11,965 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:52:11,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:52:11,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1440672699, now seen corresponding path program 1 times [2021-10-15 19:52:11,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:52:11,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181421036] [2021-10-15 19:52:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:52:11,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:52:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:52:11,998 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:52:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:52:12,034 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:52:12,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:52:12,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1765119907, now seen corresponding path program 1 times [2021-10-15 19:52:12,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:52:12,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62003998] [2021-10-15 19:52:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:52:12,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:52:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:52:12,069 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:52:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:52:12,107 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:52:12,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.10 07:52:12 BoogieIcfgContainer [2021-10-15 19:52:12,779 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-15 19:52:12,779 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:52:12,779 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:52:12,780 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:52:12,780 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:11" (3/4) ... [2021-10-15 19:52:12,783 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-15 19:52:12,830 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:52:12,830 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:52:12,832 INFO L168 Benchmark]: Toolchain (without parser) took 2329.15 ms. Allocated memory was 109.1 MB in the beginning and 142.6 MB in the end (delta: 33.6 MB). Free memory was 77.7 MB in the beginning and 59.2 MB in the end (delta: 18.5 MB). Peak memory consumption was 49.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:12,833 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 109.1 MB. Free memory is still 62.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:52:12,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 310.15 ms. Allocated memory was 109.1 MB in the beginning and 142.6 MB in the end (delta: 33.6 MB). Free memory was 77.4 MB in the beginning and 119.1 MB in the end (delta: -41.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:12,835 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.76 ms. Allocated memory is still 142.6 MB. Free memory was 119.1 MB in the beginning and 117.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:52:12,835 INFO L168 Benchmark]: Boogie Preprocessor took 26.43 ms. Allocated memory is still 142.6 MB. Free memory was 117.8 MB in the beginning and 117.0 MB in the end (delta: 831.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:12,836 INFO L168 Benchmark]: RCFGBuilder took 278.97 ms. Allocated memory is still 142.6 MB. Free memory was 117.0 MB in the beginning and 108.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:12,837 INFO L168 Benchmark]: BuchiAutomizer took 1614.61 ms. Allocated memory is still 142.6 MB. Free memory was 108.0 MB in the beginning and 61.1 MB in the end (delta: 46.9 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:12,837 INFO L168 Benchmark]: Witness Printer took 51.02 ms. Allocated memory is still 142.6 MB. Free memory was 60.9 MB in the beginning and 59.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:52:12,842 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 109.1 MB. Free memory is still 62.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 310.15 ms. Allocated memory was 109.1 MB in the beginning and 142.6 MB in the end (delta: 33.6 MB). Free memory was 77.4 MB in the beginning and 119.1 MB in the end (delta: -41.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.76 ms. Allocated memory is still 142.6 MB. Free memory was 119.1 MB in the beginning and 117.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.43 ms. Allocated memory is still 142.6 MB. Free memory was 117.8 MB in the beginning and 117.0 MB in the end (delta: 831.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 278.97 ms. Allocated memory is still 142.6 MB. Free memory was 117.0 MB in the beginning and 108.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 1614.61 ms. Allocated memory is still 142.6 MB. Free memory was 108.0 MB in the beginning and 61.1 MB in the end (delta: 46.9 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.1 GB. * Witness Printer took 51.02 ms. Allocated memory is still 142.6 MB. Free memory was 60.9 MB in the beginning and 59.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 1 terminating modules (1 trivial, 0 deterministic, 0 nondeterministic) and one nonterminating remainder module.1 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.5s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 1.1s. 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 18.5ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 17 states and ocurred in iteration 1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 25 SDtfs, 7 SDslu, 53 SDs, 0 SdLazy, 31 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 94.6ms Time LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4b5619a0=0, \old(j)=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@170aaa15=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7c0fbdd=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2879a800=0, j=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 17]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L24] int x = __VERIFIER_nondet_int(); [L26] COND FALSE !(!(x<=2147483646)) [L27] CALL rec2(x) Loop: [L18] COND FALSE !(j <= 0) [L20] CALL, EXPR rec1(j+1) [L12] COND FALSE !(i <= 0) [L14] CALL, EXPR rec1(i-2) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(i-2) [L14] CALL, EXPR rec1(rec1(i-2) - 1) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(i-2) - 1) [L14] CALL, EXPR rec1(rec1(rec1(i-2) - 1)) [L12] COND TRUE i <= 0 [L13] return 0; [L14] RET, EXPR rec1(rec1(rec1(i-2) - 1)) [L14] return rec1(rec1(rec1(i-2) - 1)) + 1; [L20] RET, EXPR rec1(j+1) [L20] CALL rec2(rec1(j+1)) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:52:12,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5237c9f-d362-47b7-9e1e-564752d4fcb1/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...