./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 32bit --witnessprinter.graph.data.programhash b329d37fd8bf911c1223006468d56bb06a44739627ad380de3f708faf818709f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 09:42:34,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 09:42:34,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 09:42:34,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 09:42:34,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 09:42:34,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 09:42:34,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 09:42:34,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 09:42:34,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 09:42:34,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 09:42:34,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 09:42:34,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 09:42:34,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 09:42:34,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 09:42:34,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 09:42:34,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 09:42:34,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 09:42:34,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 09:42:34,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 09:42:34,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 09:42:34,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 09:42:34,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 09:42:34,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 09:42:34,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 09:42:34,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 09:42:34,173 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 09:42:34,173 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 09:42:34,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 09:42:34,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 09:42:34,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 09:42:34,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 09:42:34,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 09:42:34,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 09:42:34,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 09:42:34,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 09:42:34,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 09:42:34,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 09:42:34,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 09:42:34,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 09:42:34,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 09:42:34,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 09:42:34,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-28 09:42:34,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 09:42:34,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 09:42:34,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 09:42:34,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 09:42:34,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 09:42:34,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 09:42:34,210 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 09:42:34,210 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-28 09:42:34,210 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-28 09:42:34,211 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-28 09:42:34,212 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-28 09:42:34,212 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-28 09:42:34,212 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-28 09:42:34,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 09:42:34,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 09:42:34,212 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 09:42:34,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 09:42:34,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 09:42:34,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 09:42:34,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-28 09:42:34,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-28 09:42:34,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-28 09:42:34,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 09:42:34,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 09:42:34,214 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-28 09:42:34,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 09:42:34,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-28 09:42:34,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 09:42:34,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 09:42:34,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 09:42:34,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 09:42:34,216 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-28 09:42:34,216 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b329d37fd8bf911c1223006468d56bb06a44739627ad380de3f708faf818709f [2021-12-28 09:42:34,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 09:42:34,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 09:42:34,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 09:42:34,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 09:42:34,485 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 09:42:34,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c [2021-12-28 09:42:34,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aec11a30b/b60421f09eac4a7297d87fc943482c78/FLAGe548748c7 [2021-12-28 09:42:34,884 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 09:42:34,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c [2021-12-28 09:42:34,889 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aec11a30b/b60421f09eac4a7297d87fc943482c78/FLAGe548748c7 [2021-12-28 09:42:35,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aec11a30b/b60421f09eac4a7297d87fc943482c78 [2021-12-28 09:42:35,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 09:42:35,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 09:42:35,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 09:42:35,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 09:42:35,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 09:42:35,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4438005a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35, skipping insertion in model container [2021-12-28 09:42:35,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 09:42:35,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 09:42:35,493 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[354,367] [2021-12-28 09:42:35,495 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[442,455] [2021-12-28 09:42:35,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 09:42:35,504 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 09:42:35,513 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[354,367] [2021-12-28 09:42:35,514 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-2.c[442,455] [2021-12-28 09:42:35,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 09:42:35,525 INFO L208 MainTranslator]: Completed translation [2021-12-28 09:42:35,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35 WrapperNode [2021-12-28 09:42:35,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 09:42:35,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 09:42:35,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 09:42:35,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 09:42:35,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,573 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2021-12-28 09:42:35,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 09:42:35,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 09:42:35,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 09:42:35,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 09:42:35,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 09:42:35,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 09:42:35,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 09:42:35,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 09:42:35,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (1/1) ... [2021-12-28 09:42:35,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-28 09:42:35,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 09:42:35,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-28 09:42:35,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-28 09:42:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 09:42:35,693 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-12-28 09:42:35,694 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-12-28 09:42:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 09:42:35,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 09:42:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 09:42:35,694 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2021-12-28 09:42:35,694 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2021-12-28 09:42:35,729 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 09:42:35,730 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 09:42:35,812 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 09:42:35,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 09:42:35,816 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 09:42:35,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 09:42:35 BoogieIcfgContainer [2021-12-28 09:42:35,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 09:42:35,818 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-28 09:42:35,818 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-28 09:42:35,820 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-28 09:42:35,820 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-28 09:42:35,820 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.12 09:42:35" (1/3) ... [2021-12-28 09:42:35,821 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@69eb4951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.12 09:42:35, skipping insertion in model container [2021-12-28 09:42:35,821 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-28 09:42:35,821 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 09:42:35" (2/3) ... [2021-12-28 09:42:35,822 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@69eb4951 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.12 09:42:35, skipping insertion in model container [2021-12-28 09:42:35,822 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-28 09:42:35,822 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 09:42:35" (3/3) ... [2021-12-28 09:42:35,823 INFO L388 chiAutomizerObserver]: Analyzing ICFG afterrec_2calls-2.c [2021-12-28 09:42:35,848 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-28 09:42:35,849 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-28 09:42:35,849 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-28 09:42:35,849 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-28 09:42:35,849 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-28 09:42:35,849 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-28 09:42:35,849 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-28 09:42:35,849 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-28 09:42:35,858 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 09:42:35,876 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-28 09:42:35,876 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-28 09:42:35,876 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-28 09:42:35,880 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-28 09:42:35,880 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-28 09:42:35,881 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-28 09:42:35,881 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 09:42:35,882 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-28 09:42:35,882 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-28 09:42:35,882 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-28 09:42:35,883 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-28 09:42:35,883 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-28 09:42:35,887 INFO L791 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(20, 2);call #Ultimate.allocInit(12, 3); 11#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1; 16#L23true call f(2);< 13#fENTRYtrue [2021-12-28 09:42:35,887 INFO L793 eck$LassoCheckResult]: Loop: 13#fENTRYtrue ~n := #in~n; 6#L9true assume !(~n < 3);#t~post6 := ~n;~n := #t~post6 - 1;havoc #t~post6; 9#L11true call f2(~n);< 7#f2ENTRYtrue ~n := #in~n; 15#L16true assume !(~n < 3);#t~post7 := ~n;~n := #t~post7 - 1;havoc #t~post7; 17#L18true call f(~n);< 13#fENTRYtrue [2021-12-28 09:42:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 09:42:35,892 INFO L85 PathProgramCache]: Analyzing trace with hash 38808, now seen corresponding path program 1 times [2021-12-28 09:42:35,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 09:42:35,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746125886] [2021-12-28 09:42:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 09:42:35,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 09:42:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 09:42:35,964 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-28 09:42:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 09:42:35,996 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-28 09:42:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 09:42:35,999 INFO L85 PathProgramCache]: Analyzing trace with hash 891958565, now seen corresponding path program 1 times [2021-12-28 09:42:35,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 09:42:36,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506066483] [2021-12-28 09:42:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 09:42:36,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 09:42:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 09:42:36,018 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-28 09:42:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 09:42:36,033 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-28 09:42:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 09:42:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash 904560508, now seen corresponding path program 1 times [2021-12-28 09:42:36,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 09:42:36,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354438783] [2021-12-28 09:42:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 09:42:36,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 09:42:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 09:42:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 09:42:36,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 09:42:36,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354438783] [2021-12-28 09:42:36,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354438783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 09:42:36,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 09:42:36,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 09:42:36,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74120627] [2021-12-28 09:42:36,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 09:42:36,330 INFO L210 LassoAnalysis]: Preferences: [2021-12-28 09:42:36,330 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-28 09:42:36,330 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-28 09:42:36,331 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-28 09:42:36,331 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-28 09:42:36,331 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-28 09:42:36,331 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-28 09:42:36,331 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-28 09:42:36,331 INFO L133 ssoRankerPreferences]: Filename of dumped script: afterrec_2calls-2.c_Iteration1_Loop [2021-12-28 09:42:36,331 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-28 09:42:36,332 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-28 09:42:36,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,351 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,385 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-28 09:42:36,385 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-28 09:42:36,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-28 09:42:36,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 09:42:36,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-28 09:42:36,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-28 09:42:36,391 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-28 09:42:36,391 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-28 09:42:36,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-28 09:42:36,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-28 09:42:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 09:42:36,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-28 09:42:36,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-28 09:42:36,434 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-28 09:42:36,434 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-28 09:42:36,494 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-28 09:42:36,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-28 09:42:36,500 INFO L210 LassoAnalysis]: Preferences: [2021-12-28 09:42:36,500 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-28 09:42:36,500 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-28 09:42:36,500 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-28 09:42:36,500 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-28 09:42:36,500 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-28 09:42:36,500 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-28 09:42:36,500 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-28 09:42:36,500 INFO L133 ssoRankerPreferences]: Filename of dumped script: afterrec_2calls-2.c_Iteration1_Loop [2021-12-28 09:42:36,500 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-28 09:42:36,500 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-28 09:42:36,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,512 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-28 09:42:36,551 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-28 09:42:36,554 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-28 09:42:36,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-28 09:42:36,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 09:42:36,576 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-28 09:42:36,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-28 09:42:36,579 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 [2021-12-28 09:42:36,586 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-28 09:42:36,586 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-28 09:42:36,586 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-28 09:42:36,587 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-28 09:42:36,587 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-28 09:42:36,589 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-28 09:42:36,589 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-28 09:42:36,601 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-28 09:42:36,606 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-28 09:42:36,606 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-28 09:42:36,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-28 09:42:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 09:42:36,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-28 09:42:36,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-28 09:42:36,636 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-28 09:42:36,636 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-28 09:42:36,636 INFO L513 LassoAnalysis]: Proved termination. [2021-12-28 09:42:36,637 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(f_#in~n) = 1*f_#in~n Supporting invariants [] [2021-12-28 09:42:36,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-28 09:42:36,663 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-28 09:42:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 09:42:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 09:42:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 09:42:36,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 09:42:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 09:42:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-28 09:42:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 09:42:36,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-12-28 09:42:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 09:42:36,860 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2021-12-28 09:42:36,861 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-12-28 09:42:37,012 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 56 states and 62 transitions. Complement of second has 26 states. [2021-12-28 09:42:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 1 stem states 6 non-accepting loop states 1 accepting loop states [2021-12-28 09:42:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-12-28 09:42:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 24 transitions. [2021-12-28 09:42:37,021 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 24 transitions. Stem has 3 letters. Loop has 6 letters. [2021-12-28 09:42:37,022 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-28 09:42:37,022 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 24 transitions. Stem has 9 letters. Loop has 6 letters. [2021-12-28 09:42:37,023 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-28 09:42:37,023 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 24 transitions. Stem has 3 letters. Loop has 12 letters. [2021-12-28 09:42:37,024 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-28 09:42:37,024 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 56 states and 62 transitions. [2021-12-28 09:42:37,032 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-28 09:42:37,034 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 56 states to 0 states and 0 transitions. [2021-12-28 09:42:37,034 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-28 09:42:37,034 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-28 09:42:37,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-28 09:42:37,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 09:42:37,035 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 09:42:37,035 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 09:42:37,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 09:42:37,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 09:42:37,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 09:42:37,039 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 2 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) [2021-12-28 09:42:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 09:42:37,040 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-12-28 09:42:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 09:42:37,042 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-12-28 09:42:37,042 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-28 09:42:37,042 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-12-28 09:42:37,042 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-28 09:42:37,042 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-28 09:42:37,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-28 09:42:37,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 09:42:37,042 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 09:42:37,043 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 09:42:37,043 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-28 09:42:37,043 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-28 09:42:37,043 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-28 09:42:37,043 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-28 09:42:37,044 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-28 09:42:37,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.12 09:42:37 BoogieIcfgContainer [2021-12-28 09:42:37,048 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-28 09:42:37,050 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 09:42:37,050 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 09:42:37,050 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 09:42:37,050 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 09:42:35" (3/4) ... [2021-12-28 09:42:37,053 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-28 09:42:37,053 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 09:42:37,054 INFO L158 Benchmark]: Toolchain (without parser) took 1735.67ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 34.1MB in the beginning and 33.7MB in the end (delta: 347.4kB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2021-12-28 09:42:37,055 INFO L158 Benchmark]: CDTParser took 0.70ms. Allocated memory is still 54.5MB. Free memory was 37.7MB in the beginning and 37.7MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 09:42:37,056 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.53ms. Allocated memory is still 54.5MB. Free memory was 33.8MB in the beginning and 24.6MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-28 09:42:37,060 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.12ms. Allocated memory is still 54.5MB. Free memory was 24.6MB in the beginning and 39.0MB in the end (delta: -14.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-28 09:42:37,060 INFO L158 Benchmark]: Boogie Preprocessor took 12.60ms. Allocated memory is still 54.5MB. Free memory was 39.0MB in the beginning and 38.1MB in the end (delta: 829.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 09:42:37,061 INFO L158 Benchmark]: RCFGBuilder took 229.91ms. Allocated memory is still 54.5MB. Free memory was 38.0MB in the beginning and 29.8MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-28 09:42:37,062 INFO L158 Benchmark]: BuchiAutomizer took 1231.06ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 29.6MB in the beginning and 34.1MB in the end (delta: -4.5MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-12-28 09:42:37,062 INFO L158 Benchmark]: Witness Printer took 3.94ms. Allocated memory is still 67.1MB. Free memory was 34.1MB in the beginning and 33.7MB in the end (delta: 383.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 09:42:37,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70ms. Allocated memory is still 54.5MB. Free memory was 37.7MB in the beginning and 37.7MB in the end (delta: 45.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.53ms. Allocated memory is still 54.5MB. Free memory was 33.8MB in the beginning and 24.6MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.12ms. Allocated memory is still 54.5MB. Free memory was 24.6MB in the beginning and 39.0MB in the end (delta: -14.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.60ms. Allocated memory is still 54.5MB. Free memory was 39.0MB in the beginning and 38.1MB in the end (delta: 829.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 229.91ms. Allocated memory is still 54.5MB. Free memory was 38.0MB in the beginning and 29.8MB in the end (delta: 8.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 1231.06ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 29.6MB in the beginning and 34.1MB in the end (delta: -4.5MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Witness Printer took 3.94ms. Allocated memory is still 67.1MB. Free memory was 34.1MB in the beginning and 33.7MB in the end (delta: 383.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 9 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.2s and 2 iterations. TraceHistogramMax:1. Analysis of lassos took 0.7s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 0 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49 IncrementalHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 7 mSDtfsCounter, 49 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT0 conc0 concLT1 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq154 hnf94 smp100 dnf100 smp100 tf112 neg94 sie100 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 81ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-28 09:42:37,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE