./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be --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 727b654585befeb7272249307a5de272b17c4e2d2d1afa67fd11f4eb185d7508 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-e943c26 [2021-10-21 19:58:37,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:58:37,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:58:37,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:58:37,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:58:37,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:58:37,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:58:37,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:58:37,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:58:37,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:58:37,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:58:37,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:58:37,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:58:37,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:58:37,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:58:37,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:58:37,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:58:37,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:58:37,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:58:37,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:58:37,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:58:37,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:58:37,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:58:37,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:58:37,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:58:37,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:58:37,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:58:37,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:58:37,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:58:37,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:58:37,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:58:37,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:58:37,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:58:37,226 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:58:37,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:58:37,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:58:37,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:58:37,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:58:37,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:58:37,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:58:37,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:58:37,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-21 19:58:37,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:58:37,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:58:37,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:58:37,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:58:37,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:58:37,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:58:37,290 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:58:37,291 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-21 19:58:37,291 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-21 19:58:37,291 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-21 19:58:37,292 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-21 19:58:37,292 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-21 19:58:37,293 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-21 19:58:37,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:58:37,293 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:58:37,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:58:37,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:58:37,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-21 19:58:37,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-21 19:58:37,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-21 19:58:37,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:58:37,295 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-21 19:58:37,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:58:37,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-21 19:58:37,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:58:37,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:58:37,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:58:37,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:58:37,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:58:37,298 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-21 19:58:37,298 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_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 727b654585befeb7272249307a5de272b17c4e2d2d1afa67fd11f4eb185d7508 [2021-10-21 19:58:37,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:58:37,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:58:37,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:58:37,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:58:37,696 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:58:37,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2021-10-21 19:58:37,770 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/data/79e487c78/11bc4b39884e41eebb3a6274210860a3/FLAGe35c5af08 [2021-10-21 19:58:38,393 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:58:38,393 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2021-10-21 19:58:38,400 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/data/79e487c78/11bc4b39884e41eebb3a6274210860a3/FLAGe35c5af08 [2021-10-21 19:58:38,782 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/data/79e487c78/11bc4b39884e41eebb3a6274210860a3 [2021-10-21 19:58:38,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:58:38,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:58:38,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:58:38,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:58:38,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:58:38,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:58:38" (1/1) ... [2021-10-21 19:58:38,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67baaed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:38, skipping insertion in model container [2021-10-21 19:58:38,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:58:38" (1/1) ... [2021-10-21 19:58:38,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:58:38,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:58:38,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:58:38,993 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:58:39,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:58:39,049 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:58:39,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39 WrapperNode [2021-10-21 19:58:39,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:58:39,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:58:39,052 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:58:39,052 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:58:39,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:58:39,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:58:39,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:58:39,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:58:39,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:58:39,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:58:39,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:58:39,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:58:39,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (1/1) ... [2021-10-21 19:58:39,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:39,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:39,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:39,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-21 19:58:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-10-21 19:58:39,208 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-10-21 19:58:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-10-21 19:58:39,208 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-10-21 19:58:39,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:58:39,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:58:39,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:58:39,408 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 19:58:39,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:58:39 BoogieIcfgContainer [2021-10-21 19:58:39,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:58:39,411 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-21 19:58:39,411 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-21 19:58:39,419 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-21 19:58:39,420 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:58:39,420 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.10 07:58:38" (1/3) ... [2021-10-21 19:58:39,422 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@34c3cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:58:39, skipping insertion in model container [2021-10-21 19:58:39,422 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:58:39,422 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:58:39" (2/3) ... [2021-10-21 19:58:39,423 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@34c3cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:58:39, skipping insertion in model container [2021-10-21 19:58:39,423 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:58:39,423 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:58:39" (3/3) ... [2021-10-21 19:58:39,424 INFO L389 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a.c [2021-10-21 19:58:39,486 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-21 19:58:39,486 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-21 19:58:39,486 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-21 19:58:39,486 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-21 19:58:39,486 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-21 19:58:39,486 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-21 19:58:39,487 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-21 19:58:39,487 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-21 19:58:39,511 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:58:39,543 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-21 19:58:39,543 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:58:39,543 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:58:39,550 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:58:39,551 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:58:39,551 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-21 19:58:39,551 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-21 19:58:39,556 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-21 19:58:39,557 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:58:39,557 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:58:39,558 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-21 19:58:39,558 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:58:39,566 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 13#L26true call main_#t~ret5 := g(main_~x~0);< 14#gENTRYtrue [2021-10-21 19:58:39,566 INFO L793 eck$LassoCheckResult]: Loop: 14#gENTRYtrue ~x := #in~x; 7#L19true assume !(~x <= 0); 12#L20true call #t~ret2 := f(~x - 1);< 15#fENTRYtrue ~x := #in~x; 18#L13true assume !(~x <= 0); 10#L14true call #t~ret0 := g(~x);< 14#gENTRYtrue [2021-10-21 19:58:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1583, now seen corresponding path program 1 times [2021-10-21 19:58:39,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:39,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681878693] [2021-10-21 19:58:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:39,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:39,670 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:58:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:39,697 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:58:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1158035901, now seen corresponding path program 1 times [2021-10-21 19:58:39,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:39,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480366175] [2021-10-21 19:58:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:39,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:39,744 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:58:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:39,763 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:58:39,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:39,765 INFO L82 PathProgramCache]: Analyzing trace with hash 734553451, now seen corresponding path program 1 times [2021-10-21 19:58:39,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:39,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349416320] [2021-10-21 19:58:39,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:39,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:39,790 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:58:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:39,810 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:58:40,080 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:58:40,083 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:58:40,083 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:58:40,083 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:58:40,084 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:58:40,084 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,084 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:58:40,084 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:58:40,085 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2021-10-21 19:58:40,085 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:58:40,085 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:58:40,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,238 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:58:40,239 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:58:40,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,254 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:58:40,254 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:58:40,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-21 19:58:40,285 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:58:40,286 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f_#res=0} Honda state: {f_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 19:58:40,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2021-10-21 19:58:40,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-21 19:58:40,330 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:58:40,330 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:58:40,354 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:58:40,354 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret2=0} Honda state: {g_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 19:58:40,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:40,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,390 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-21 19:58:40,392 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:58:40,392 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:58:40,405 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:58:40,406 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret3=0} Honda state: {g_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 19:58:40,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:40,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,449 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,459 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:58:40,459 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:58:40,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-21 19:58:40,482 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:58:40,482 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 19:58:40,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:40,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,526 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-21 19:58:40,529 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:58:40,530 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:58:40,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-10-21 19:58:40,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,563 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-21 19:58:40,570 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:58:40,570 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:58:40,645 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:58:40,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:40,651 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:58:40,651 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:58:40,651 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:58:40,651 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:58:40,651 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:58:40,651 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,652 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:58:40,652 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:58:40,652 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2021-10-21 19:58:40,652 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:58:40,652 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:58:40,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,662 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:58:40,799 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:58:40,805 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:58:40,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,808 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-21 19:58:40,810 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:58:40,818 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:58:40,818 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:58:40,818 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:58:40,818 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:58:40,819 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:58:40,820 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:58:40,820 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:58:40,826 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:58:40,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:40,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-21 19:58:40,854 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:58:40,862 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:58:40,862 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:58:40,862 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:58:40,862 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:58:40,862 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:58:40,863 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:58:40,863 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:58:40,872 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:58:40,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:40,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,898 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-21 19:58:40,900 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:58:40,908 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:58:40,908 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:58:40,908 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:58:40,908 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:58:40,908 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:58:40,909 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:58:40,909 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:58:40,912 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:58:40,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:40,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:40,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-21 19:58:40,946 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:58:40,954 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:58:40,954 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:58:40,955 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:58:40,955 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:58:40,955 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:58:40,958 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:58:40,959 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:58:40,967 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:58:40,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-10-21 19:58:40,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:40,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:40,995 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:41,002 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:58:41,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-21 19:58:41,012 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:58:41,012 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:58:41,012 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:58:41,012 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:58:41,013 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:58:41,013 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:58:41,014 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:58:41,019 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:58:41,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2021-10-21 19:58:41,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:41,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:41,042 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:41,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-21 19:58:41,043 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:58:41,053 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:58:41,053 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:58:41,053 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:58:41,053 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:58:41,054 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:58:41,055 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:58:41,055 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:58:41,073 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:58:41,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:41,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:41,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:41,115 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:41,121 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:58:41,132 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:58:41,132 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:58:41,132 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:58:41,132 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:58:41,132 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:58:41,134 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:58:41,134 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:58:41,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-21 19:58:41,161 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:58:41,166 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:58:41,166 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:58:41,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:58:41,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:58:41,170 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:58:41,178 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:58:41,179 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:58:41,179 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:58:41,179 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2021-10-21 19:58:41,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-21 19:58:41,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:41,222 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:58:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:41,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:58:41,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:58:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:58:41,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:58:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:58:41,523 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2021-10-21 19:58:41,524 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:41,743 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5). Second operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 62 states and 81 transitions. Complement of second has 24 states. [2021-10-21 19:58:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2021-10-21 19:58:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:58:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2021-10-21 19:58:41,749 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 6 letters. [2021-10-21 19:58:41,750 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:58:41,750 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 8 letters. Loop has 6 letters. [2021-10-21 19:58:41,751 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:58:41,751 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 12 letters. [2021-10-21 19:58:41,751 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:58:41,752 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2021-10-21 19:58:41,767 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-21 19:58:41,778 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 45 states and 59 transitions. [2021-10-21 19:58:41,780 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2021-10-21 19:58:41,780 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2021-10-21 19:58:41,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 59 transitions. [2021-10-21 19:58:41,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:58:41,784 INFO L681 BuchiCegarLoop]: Abstraction has 45 states and 59 transitions. [2021-10-21 19:58:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 59 transitions. [2021-10-21 19:58:41,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-10-21 19:58:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2021-10-21 19:58:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-10-21 19:58:41,834 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-10-21 19:58:41,834 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-10-21 19:58:41,835 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-21 19:58:41,835 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 56 transitions. [2021-10-21 19:58:41,840 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-21 19:58:41,840 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:58:41,840 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:58:41,842 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:41,842 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:41,843 INFO L791 eck$LassoCheckResult]: Stem: 178#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 177#L26 call main_#t~ret5 := g(main_~x~0);< 184#gENTRY ~x := #in~x; 176#L19 assume !(~x <= 0); 163#L20 call #t~ret2 := f(~x - 1);< 183#fENTRY ~x := #in~x; 188#L13 assume !(~x <= 0); 179#L14 call #t~ret0 := g(~x);< 180#gENTRY ~x := #in~x; 186#L19 assume ~x <= 0;#res := 0; 197#gFINAL assume true; 194#gEXIT >#26#return; 169#L14-1 [2021-10-21 19:58:41,843 INFO L793 eck$LassoCheckResult]: Loop: 169#L14-1 call #t~ret1 := g(1 + ~x);< 172#gENTRY ~x := #in~x; 173#L19 assume !(~x <= 0); 170#L20 call #t~ret2 := f(~x - 1);< 198#fENTRY ~x := #in~x; 196#L13 assume !(~x <= 0); 174#L14 call #t~ret0 := g(~x);< 172#gENTRY ~x := #in~x; 173#L19 assume ~x <= 0;#res := 0; 175#gFINAL assume true; 181#gEXIT >#26#return; 169#L14-1 [2021-10-21 19:58:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:41,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1661600137, now seen corresponding path program 1 times [2021-10-21 19:58:41,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:41,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791428344] [2021-10-21 19:58:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:41,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:41,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:58:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:58:41,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:41,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791428344] [2021-10-21 19:58:41,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791428344] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:41,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:41,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:41,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626153678] [2021-10-21 19:58:41,989 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:58:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1499912510, now seen corresponding path program 1 times [2021-10-21 19:58:41,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:41,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501084596] [2021-10-21 19:58:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:41,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:42,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:58:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:58:42,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:58:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:58:42,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:58:42,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501084596] [2021-10-21 19:58:42,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501084596] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:58:42,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:58:42,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:58:42,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872003919] [2021-10-21 19:58:42,118 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:58:42,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:58:42,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:58:42,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:58:42,127 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. cyclomatic complexity: 14 Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:58:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:58:42,191 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-10-21 19:58:42,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:58:42,192 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 59 transitions. [2021-10-21 19:58:42,197 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-21 19:58:42,202 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 44 states and 55 transitions. [2021-10-21 19:58:42,202 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2021-10-21 19:58:42,203 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2021-10-21 19:58:42,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 55 transitions. [2021-10-21 19:58:42,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:58:42,204 INFO L681 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-10-21 19:58:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states and 55 transitions. [2021-10-21 19:58:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-21 19:58:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2021-10-21 19:58:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-10-21 19:58:42,220 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-10-21 19:58:42,223 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-10-21 19:58:42,223 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-21 19:58:42,223 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2021-10-21 19:58:42,227 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-10-21 19:58:42,228 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:58:42,228 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:58:42,232 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:42,232 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:58:42,233 INFO L791 eck$LassoCheckResult]: Stem: 289#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 290#L26 call main_#t~ret5 := g(main_~x~0);< 297#gENTRY ~x := #in~x; 298#L19 assume !(~x <= 0); 277#L20 call #t~ret2 := f(~x - 1);< 296#fENTRY ~x := #in~x; 307#L13 assume !(~x <= 0); 287#L14 call #t~ret0 := g(~x);< 292#gENTRY ~x := #in~x; 286#L19 assume !(~x <= 0); 273#L20 call #t~ret2 := f(~x - 1);< 295#fENTRY ~x := #in~x; 315#L13 assume ~x <= 0;#res := 0; 272#fFINAL assume true; 274#fEXIT >#30#return; 279#L20-1 call #t~ret3 := f(~x - 2);< 299#fENTRY ~x := #in~x; 300#L13 assume ~x <= 0;#res := 0; 305#fFINAL assume true; 314#fEXIT >#32#return; 306#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 293#gFINAL assume true; 294#gEXIT >#26#return; 282#L14-1 [2021-10-21 19:58:42,238 INFO L793 eck$LassoCheckResult]: Loop: 282#L14-1 call #t~ret1 := g(1 + ~x);< 285#gENTRY ~x := #in~x; 313#L19 assume !(~x <= 0); 284#L20 call #t~ret2 := f(~x - 1);< 310#fENTRY ~x := #in~x; 308#L13 assume !(~x <= 0); 291#L14 call #t~ret0 := g(~x);< 285#gENTRY ~x := #in~x; 313#L19 assume !(~x <= 0); 284#L20 call #t~ret2 := f(~x - 1);< 310#fENTRY ~x := #in~x; 308#L13 assume ~x <= 0;#res := 0; 309#fFINAL assume true; 312#fEXIT >#30#return; 283#L20-1 call #t~ret3 := f(~x - 2);< 310#fENTRY ~x := #in~x; 308#L13 assume ~x <= 0;#res := 0; 309#fFINAL assume true; 312#fEXIT >#32#return; 306#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 293#gFINAL assume true; 294#gEXIT >#26#return; 282#L14-1 [2021-10-21 19:58:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:42,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1603563642, now seen corresponding path program 1 times [2021-10-21 19:58:42,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:42,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148321791] [2021-10-21 19:58:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:42,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:42,262 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:58:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:42,294 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:58:42,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:42,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1170922075, now seen corresponding path program 1 times [2021-10-21 19:58:42,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:42,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473635793] [2021-10-21 19:58:42,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:42,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:42,320 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:58:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:42,345 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:58:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:58:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash 878037024, now seen corresponding path program 1 times [2021-10-21 19:58:42,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:58:42,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190363572] [2021-10-21 19:58:42,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:58:42,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:58:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:42,376 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:58:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:58:42,416 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:58:43,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.10 07:58:43 BoogieIcfgContainer [2021-10-21 19:58:43,380 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-21 19:58:43,381 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:58:43,381 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:58:43,381 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:58:43,382 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:58:39" (3/4) ... [2021-10-21 19:58:43,385 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-21 19:58:43,428 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:58:43,428 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:58:43,430 INFO L168 Benchmark]: Toolchain (without parser) took 4642.69 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 73.5 MB in the beginning and 61.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:58:43,430 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 102.8 MB. Free memory was 56.9 MB in the beginning and 56.8 MB in the end (delta: 62.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:58:43,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.78 ms. Allocated memory is still 102.8 MB. Free memory was 73.2 MB in the beginning and 78.9 MB in the end (delta: -5.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:58:43,431 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.51 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 77.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:58:43,432 INFO L168 Benchmark]: Boogie Preprocessor took 17.69 ms. Allocated memory is still 102.8 MB. Free memory was 77.6 MB in the beginning and 76.7 MB in the end (delta: 932.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:58:43,432 INFO L168 Benchmark]: RCFGBuilder took 305.88 ms. Allocated memory is still 102.8 MB. Free memory was 76.7 MB in the beginning and 68.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:58:43,433 INFO L168 Benchmark]: BuchiAutomizer took 3969.17 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 68.4 MB in the beginning and 63.1 MB in the end (delta: 5.3 MB). Peak memory consumption was 43.8 MB. Max. memory is 16.1 GB. [2021-10-21 19:58:43,434 INFO L168 Benchmark]: Witness Printer took 47.43 ms. Allocated memory is still 140.5 MB. Free memory was 63.1 MB in the beginning and 61.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:58:43,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 102.8 MB. Free memory was 56.9 MB in the beginning and 56.8 MB in the end (delta: 62.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.78 ms. Allocated memory is still 102.8 MB. Free memory was 73.2 MB in the beginning and 78.9 MB in the end (delta: -5.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.51 ms. Allocated memory is still 102.8 MB. Free memory was 78.9 MB in the beginning and 77.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.69 ms. Allocated memory is still 102.8 MB. Free memory was 77.6 MB in the beginning and 76.7 MB in the end (delta: 932.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 305.88 ms. Allocated memory is still 102.8 MB. Free memory was 76.7 MB in the beginning and 68.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3969.17 ms. Allocated memory was 102.8 MB in the beginning and 140.5 MB in the end (delta: 37.7 MB). Free memory was 68.4 MB in the beginning and 63.1 MB in the end (delta: 5.3 MB). Peak memory consumption was 43.8 MB. Max. memory is 16.1 GB. * Witness Printer took 47.43 ms. Allocated memory is still 140.5 MB. Free memory was 63.1 MB in the beginning and 61.1 MB in the end (delta: 2.0 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 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 7 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 44 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.8s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 3.0s. Construction of modules took 0.1s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 2. Automata minimization 48.9ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 44 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 26 SDtfs, 21 SDslu, 42 SDs, 0 SdLazy, 90 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 102.3ms Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 20ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 14]: 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@20652900=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5ea61753=0, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@69244428=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@641517ab=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@a148291=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2b71c232=0, NULL=0, x=1, \result=0, \old(x)=0, x=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L25] int x = __VERIFIER_nondet_int(); [L26] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) Loop: [L14] CALL g(x + 1) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:58:43,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17bc115-0d54-4c85-9e13-154abbacd4f7/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...