./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa --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 --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:29:33,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:29:33,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:29:33,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:29:33,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:29:33,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:29:33,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:29:33,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:29:33,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:29:33,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:29:33,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:29:33,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:29:33,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:29:33,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:29:33,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:29:33,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:29:33,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:29:33,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:29:33,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:29:33,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:29:33,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:29:33,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:29:33,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:29:33,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:29:33,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:29:33,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:29:33,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:29:33,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:29:33,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:29:33,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:29:33,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:29:33,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:29:33,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:29:33,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:29:33,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:29:33,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:29:33,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:29:33,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:29:33,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:29:33,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:29:33,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:29:33,215 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-06 19:29:33,240 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:29:33,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:29:33,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:29:33,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:29:33,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:29:33,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:29:33,242 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:29:33,242 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-06 19:29:33,242 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-06 19:29:33,242 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-06 19:29:33,242 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-06 19:29:33,243 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-06 19:29:33,243 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-06 19:29:33,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:29:33,243 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 19:29:33,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:29:33,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:29:33,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-06 19:29:33,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-06 19:29:33,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-06 19:29:33,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:29:33,244 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-06 19:29:33,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:29:33,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-06 19:29:33,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:29:33,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:29:33,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:29:33,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:29:33,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:29:33,247 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-06 19:29:33,247 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_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a [2021-12-06 19:29:33,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:29:33,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:29:33,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:29:33,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:29:33,462 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:29:33,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2021-12-06 19:29:33,509 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/data/33b62cb71/18710d20214e4f169684fad403fc68a8/FLAG10b26e160 [2021-12-06 19:29:33,874 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:29:33,875 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2021-12-06 19:29:33,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/data/33b62cb71/18710d20214e4f169684fad403fc68a8/FLAG10b26e160 [2021-12-06 19:29:33,891 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/data/33b62cb71/18710d20214e4f169684fad403fc68a8 [2021-12-06 19:29:33,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:29:33,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:29:33,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:29:33,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:29:33,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:29:33,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:29:33" (1/1) ... [2021-12-06 19:29:33,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@133b11a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:33, skipping insertion in model container [2021-12-06 19:29:33,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:29:33" (1/1) ... [2021-12-06 19:29:33,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:29:33,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:29:34,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:29:34,029 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:29:34,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:29:34,047 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:29:34,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34 WrapperNode [2021-12-06 19:29:34,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:29:34,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:29:34,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:29:34,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:29:34,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,076 INFO L137 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 9 [2021-12-06 19:29:34,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:29:34,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:29:34,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:29:34,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:29:34,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:29:34,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:29:34,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:29:34,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:29:34,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (1/1) ... [2021-12-06 19:29:34,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 19:29:34,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:29:34,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 19:29:34,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-06 19:29:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-12-06 19:29:34,148 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-12-06 19:29:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-12-06 19:29:34,148 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-12-06 19:29:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:29:34,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:29:34,190 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:29:34,191 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:29:34,247 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:29:34,252 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:29:34,252 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 19:29:34,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:29:34 BoogieIcfgContainer [2021-12-06 19:29:34,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:29:34,254 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-06 19:29:34,254 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-06 19:29:34,257 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-06 19:29:34,257 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-06 19:29:34,257 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 06.12 07:29:33" (1/3) ... [2021-12-06 19:29:34,258 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@241ad585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.12 07:29:34, skipping insertion in model container [2021-12-06 19:29:34,258 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-06 19:29:34,258 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:29:34" (2/3) ... [2021-12-06 19:29:34,258 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@241ad585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.12 07:29:34, skipping insertion in model container [2021-12-06 19:29:34,258 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-06 19:29:34,258 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:29:34" (3/3) ... [2021-12-06 19:29:34,259 INFO L388 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2021-12-06 19:29:34,292 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-06 19:29:34,292 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-06 19:29:34,292 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-06 19:29:34,292 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-06 19:29:34,292 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-06 19:29:34,292 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-06 19:29:34,292 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-06 19:29:34,292 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-06 19:29:34,303 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) [2021-12-06 19:29:34,320 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-12-06 19:29:34,320 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 19:29:34,320 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 19:29:34,325 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-06 19:29:34,325 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:34,326 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-06 19:29:34,326 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) [2021-12-06 19:29:34,329 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-12-06 19:29:34,329 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 19:29:34,329 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 19:29:34,330 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-06 19:29:34,330 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:34,335 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 14#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; 13#L26true assume !!(main_~x~0#1 <= 2147483646); 8#L27true call main_#t~ret6#1 := rec2(main_~x~0#1);< 17#rec2ENTRYtrue [2021-12-06 19:29:34,335 INFO L793 eck$LassoCheckResult]: Loop: 17#rec2ENTRYtrue ~j := #in~j; 18#L18true assume !(~j <= 0); 21#L20true call #t~ret3 := rec1(1 + ~j);< 23#rec1ENTRYtrue ~i := #in~i; 19#L12true assume ~i <= 0;#res := 0; 15#rec1FINALtrue assume true; 16#rec1EXITtrue >#39#return; 4#L20-1true call #t~ret4 := rec2(#t~ret3);< 17#rec2ENTRYtrue [2021-12-06 19:29:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:34,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 1 times [2021-12-06 19:29:34,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:34,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774997206] [2021-12-06 19:29:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:34,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:29:34,406 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:29:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:29:34,420 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:29:34,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:34,422 INFO L85 PathProgramCache]: Analyzing trace with hash -931063642, now seen corresponding path program 1 times [2021-12-06 19:29:34,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:34,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865178060] [2021-12-06 19:29:34,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:34,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:34,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:29:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:29:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:29:34,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:29:34,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865178060] [2021-12-06 19:29:34,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865178060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:29:34,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:29:34,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:29:34,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87028802] [2021-12-06 19:29:34,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:29:34,507 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-06 19:29:34,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:29:34,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:29:34,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:29:34,535 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) [2021-12-06 19:29:34,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:29:34,596 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2021-12-06 19:29:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:29:34,601 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 36 transitions. [2021-12-06 19:29:34,605 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-12-06 19:29:34,610 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 18 states and 24 transitions. [2021-12-06 19:29:34,611 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2021-12-06 19:29:34,612 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-12-06 19:29:34,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2021-12-06 19:29:34,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 19:29:34,614 INFO L681 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-12-06 19:29:34,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2021-12-06 19:29:34,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-06 19:29:34,637 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) [2021-12-06 19:29:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-12-06 19:29:34,639 INFO L704 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-12-06 19:29:34,640 INFO L587 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-12-06 19:29:34,640 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-06 19:29:34,640 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 24 transitions. [2021-12-06 19:29:34,641 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-12-06 19:29:34,641 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 19:29:34,641 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 19:29:34,643 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-06 19:29:34,643 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:29:34,643 INFO L791 eck$LassoCheckResult]: Stem: 70#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 71#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet5#1, main_#t~ret6#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet5#1;havoc main_#t~nondet5#1; 79#L26 assume !!(main_~x~0#1 <= 2147483646); 68#L27 call main_#t~ret6#1 := rec2(main_~x~0#1);< 69#rec2ENTRY [2021-12-06 19:29:34,643 INFO L793 eck$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 [2021-12-06 19:29:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:34,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1510579, now seen corresponding path program 2 times [2021-12-06 19:29:34,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:34,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526596604] [2021-12-06 19:29:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:34,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:34,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:29:34,651 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:29:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:29:34,655 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:29:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1852060604, now seen corresponding path program 1 times [2021-12-06 19:29:34,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:34,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778140180] [2021-12-06 19:29:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:34,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:29:34,678 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:29:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:29:34,700 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:29:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:29:34,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2035496338, now seen corresponding path program 1 times [2021-12-06 19:29:34,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:29:34,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932118022] [2021-12-06 19:29:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:29:34,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:29:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:29:34,722 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 19:29:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 19:29:34,742 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 19:29:35,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 06.12 07:29:35 BoogieIcfgContainer [2021-12-06 19:29:35,054 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-06 19:29:35,054 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 19:29:35,054 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 19:29:35,054 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 19:29:35,054 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:29:34" (3/4) ... [2021-12-06 19:29:35,056 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-12-06 19:29:35,083 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 19:29:35,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 19:29:35,084 INFO L158 Benchmark]: Toolchain (without parser) took 1189.39ms. Allocated memory is still 125.8MB. Free memory was 88.1MB in the beginning and 97.9MB in the end (delta: -9.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:29:35,085 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:29:35,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.00ms. Allocated memory is still 125.8MB. Free memory was 87.9MB in the beginning and 102.4MB in the end (delta: -14.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 19:29:35,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.98ms. Allocated memory is still 125.8MB. Free memory was 102.4MB in the beginning and 101.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:29:35,086 INFO L158 Benchmark]: Boogie Preprocessor took 15.11ms. Allocated memory is still 125.8MB. Free memory was 101.0MB in the beginning and 100.5MB in the end (delta: 570.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:29:35,087 INFO L158 Benchmark]: RCFGBuilder took 160.42ms. Allocated memory is still 125.8MB. Free memory was 100.5MB in the beginning and 91.7MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 19:29:35,087 INFO L158 Benchmark]: BuchiAutomizer took 799.53ms. Allocated memory is still 125.8MB. Free memory was 91.7MB in the beginning and 99.9MB in the end (delta: -8.2MB). Peak memory consumption was 48.7MB. Max. memory is 16.1GB. [2021-12-06 19:29:35,088 INFO L158 Benchmark]: Witness Printer took 29.69ms. Allocated memory is still 125.8MB. Free memory was 99.9MB in the beginning and 97.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:29:35,091 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 125.8MB. Free memory is still 104.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 152.00ms. Allocated memory is still 125.8MB. Free memory was 87.9MB in the beginning and 102.4MB in the end (delta: -14.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.98ms. Allocated memory is still 125.8MB. Free memory was 102.4MB in the beginning and 101.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 15.11ms. Allocated memory is still 125.8MB. Free memory was 101.0MB in the beginning and 100.5MB in the end (delta: 570.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 160.42ms. Allocated memory is still 125.8MB. Free memory was 100.5MB in the beginning and 91.7MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 799.53ms. Allocated memory is still 125.8MB. Free memory was 91.7MB in the beginning and 99.9MB in the end (delta: -8.2MB). Peak memory consumption was 48.7MB. Max. memory is 16.1GB. * Witness Printer took 29.69ms. Allocated memory is still 125.8MB. Free memory was 99.9MB in the beginning and 97.9MB in the end (delta: 2.0MB). 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 0.7s and 2 iterations. TraceHistogramMax:4. Analysis of lassos took 0.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 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 18 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, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 82 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 56 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 31 IncrementalHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 26 mSDtfsCounter, 31 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 - 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 {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3a3696f5=0, \old(j)=1, x=0, \result=0, NULL=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@24660f7e=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@584cad1a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5feaa8bf=0, \result=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! [2021-12-06 19:29:35,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dff78da4-67e8-4313-9ef6-4831017a077e/bin/uautomizer-DrprNOufMa/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)