./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 20ed64ec 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/termination-crafted/MutualRecursion_1a.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-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 64bit --witnessprinter.graph.data.programhash c27ad91a5bec233234e07a14bfd5505e082df4cd ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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-20ed64e [2021-08-27 13:55:02,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 13:55:02,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 13:55:02,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 13:55:02,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 13:55:02,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 13:55:02,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 13:55:02,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 13:55:02,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 13:55:02,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 13:55:02,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 13:55:02,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 13:55:02,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 13:55:02,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 13:55:02,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 13:55:02,698 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 13:55:02,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 13:55:02,699 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 13:55:02,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 13:55:02,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 13:55:02,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 13:55:02,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 13:55:02,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 13:55:02,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 13:55:02,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 13:55:02,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 13:55:02,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 13:55:02,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 13:55:02,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 13:55:02,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 13:55:02,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 13:55:02,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 13:55:02,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 13:55:02,735 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 13:55:02,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 13:55:02,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 13:55:02,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 13:55:02,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 13:55:02,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 13:55:02,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 13:55:02,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 13:55:02,741 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 13:55:02,772 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 13:55:02,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 13:55:02,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 13:55:02,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 13:55:02,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 13:55:02,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 13:55:02,775 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 13:55:02,776 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 13:55:02,776 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 13:55:02,776 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 13:55:02,777 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 13:55:02,777 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 13:55:02,777 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 13:55:02,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 13:55:02,777 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 13:55:02,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 13:55:02,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 13:55:02,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 13:55:02,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 13:55:02,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 13:55:02,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 13:55:02,779 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 13:55:02,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 13:55:02,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 13:55:02,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 13:55:02,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 13:55:02,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 13:55:02,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 13:55:02,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 13:55:02,781 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 13:55:02,781 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c27ad91a5bec233234e07a14bfd5505e082df4cd [2021-08-27 13:55:03,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 13:55:03,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 13:55:03,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 13:55:03,133 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 13:55:03,134 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 13:55:03,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2021-08-27 13:55:03,291 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d50f5cac/bf3574a1af7f4b13910ed30b33bea05e/FLAGa3875285e [2021-08-27 13:55:03,628 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 13:55:03,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2021-08-27 13:55:03,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d50f5cac/bf3574a1af7f4b13910ed30b33bea05e/FLAGa3875285e [2021-08-27 13:55:04,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d50f5cac/bf3574a1af7f4b13910ed30b33bea05e [2021-08-27 13:55:04,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 13:55:04,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 13:55:04,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 13:55:04,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 13:55:04,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 13:55:04,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3b253a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04, skipping insertion in model container [2021-08-27 13:55:04,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 13:55:04,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 13:55:04,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:55:04,184 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 13:55:04,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:55:04,204 INFO L208 MainTranslator]: Completed translation [2021-08-27 13:55:04,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04 WrapperNode [2021-08-27 13:55:04,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 13:55:04,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 13:55:04,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 13:55:04,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 13:55:04,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 13:55:04,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 13:55:04,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 13:55:04,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 13:55:04,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 13:55:04,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 13:55:04,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 13:55:04,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 13:55:04,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (1/1) ... [2021-08-27 13:55:04,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:04,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:04,310 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) [2021-08-27 13:55:04,339 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 [2021-08-27 13:55:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-08-27 13:55:04,365 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-08-27 13:55:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-08-27 13:55:04,365 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-08-27 13:55:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 13:55:04,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 13:55:04,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 13:55:04,543 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 13:55:04,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:55:04 BoogieIcfgContainer [2021-08-27 13:55:04,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 13:55:04,548 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 13:55:04,548 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 13:55:04,550 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 13:55:04,551 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:55:04,551 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 01:55:04" (1/3) ... [2021-08-27 13:55:04,553 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@39b80a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:55:04, skipping insertion in model container [2021-08-27 13:55:04,553 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:55:04,553 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:04" (2/3) ... [2021-08-27 13:55:04,553 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@39b80a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:55:04, skipping insertion in model container [2021-08-27 13:55:04,553 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:55:04,554 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:55:04" (3/3) ... [2021-08-27 13:55:04,555 INFO L389 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a.c [2021-08-27 13:55:04,607 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 13:55:04,607 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 13:55:04,607 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 13:55:04,608 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 13:55:04,608 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 13:55:04,608 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 13:55:04,608 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 13:55:04,608 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 13:55:04,625 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) [2021-08-27 13:55:04,651 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-08-27 13:55:04,651 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:04,651 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:04,657 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:55:04,657 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-08-27 13:55:04,657 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 13:55:04,658 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) [2021-08-27 13:55:04,660 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-08-27 13:55:04,660 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:04,661 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:04,661 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:55:04,669 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-08-27 13:55:04,674 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 [2021-08-27 13:55:04,674 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 [2021-08-27 13:55:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1583, now seen corresponding path program 1 times [2021-08-27 13:55:04,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:04,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991117016] [2021-08-27 13:55:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:04,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:04,735 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:04,751 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1158035901, now seen corresponding path program 1 times [2021-08-27 13:55:04,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:04,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119896190] [2021-08-27 13:55:04,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:04,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:04,787 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:04,804 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:04,810 INFO L82 PathProgramCache]: Analyzing trace with hash 734553451, now seen corresponding path program 1 times [2021-08-27 13:55:04,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:04,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121224087] [2021-08-27 13:55:04,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:04,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:04,821 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:04,833 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:05,139 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:05,140 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:05,140 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:05,140 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:05,140 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:05,141 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,141 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:05,141 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:05,141 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2021-08-27 13:55:05,141 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:05,142 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:05,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,320 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:05,320 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:05,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,332 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) [2021-08-27 13:55:05,333 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 [2021-08-27 13:55:05,334 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:05,334 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:05,365 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:05,366 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f_#res=0} Honda state: {f_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:05,395 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 [2021-08-27 13:55:05,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,397 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) [2021-08-27 13:55:05,401 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 [2021-08-27 13:55:05,402 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:05,403 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:05,412 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:05,413 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret2=0} Honda state: {g_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:05,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-08-27 13:55:05,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,431 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) [2021-08-27 13:55:05,440 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 [2021-08-27 13:55:05,442 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:05,442 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:05,451 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:05,451 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret3=0} Honda state: {g_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:05,467 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 [2021-08-27 13:55:05,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,469 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) [2021-08-27 13:55:05,469 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 [2021-08-27 13:55:05,471 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:05,471 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:05,478 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:05,479 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:05,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-08-27 13:55:05,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,498 INFO L229 MonitoredProcess]: Starting monitored process 6 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) [2021-08-27 13:55:05,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 13:55:05,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:05,500 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:05,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:05,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,536 INFO L229 MonitoredProcess]: Starting monitored process 7 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) [2021-08-27 13:55:05,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 13:55:05,539 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:05,539 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:05,592 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:05,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:05,597 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:05,597 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:05,598 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:05,598 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:05,598 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:05,598 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,598 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:05,598 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:05,598 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2021-08-27 13:55:05,598 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:05,598 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:05,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,615 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:05,713 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:05,718 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:05,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,725 INFO L229 MonitoredProcess]: Starting monitored process 8 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) [2021-08-27 13:55:05,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-27 13:55:05,728 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 [2021-08-27 13:55:05,737 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:05,737 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:05,738 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:05,741 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:05,742 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:05,743 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:05,743 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:05,760 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:05,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:05,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,776 INFO L229 MonitoredProcess]: Starting monitored process 9 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) [2021-08-27 13:55:05,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 13:55:05,778 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 [2021-08-27 13:55:05,784 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:05,785 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:05,785 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:05,785 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:05,785 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:05,785 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:05,786 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:05,792 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:05,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:05,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,809 INFO L229 MonitoredProcess]: Starting monitored process 10 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) [2021-08-27 13:55:05,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 13:55:05,811 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 [2021-08-27 13:55:05,817 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:05,818 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:05,818 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:05,818 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:05,818 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:05,818 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:05,818 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:05,820 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:05,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2021-08-27 13:55:05,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,836 INFO L229 MonitoredProcess]: Starting monitored process 11 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) [2021-08-27 13:55:05,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 13:55:05,839 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 [2021-08-27 13:55:05,845 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:05,845 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:05,846 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:05,846 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:05,846 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:05,846 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:05,846 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:05,848 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:05,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:05,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,865 INFO L229 MonitoredProcess]: Starting monitored process 12 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) [2021-08-27 13:55:05,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 13:55:05,867 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 [2021-08-27 13:55:05,874 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:05,874 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:05,874 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:05,874 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:05,874 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:05,875 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:05,875 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:05,900 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:05,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:05,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,917 INFO L229 MonitoredProcess]: Starting monitored process 13 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) [2021-08-27 13:55:05,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 13:55:05,919 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 [2021-08-27 13:55:05,925 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:05,926 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:05,926 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:05,926 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:05,926 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:05,926 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:05,927 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:05,932 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:05,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-08-27 13:55:05,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,949 INFO L229 MonitoredProcess]: Starting monitored process 14 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) [2021-08-27 13:55:05,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-08-27 13:55:05,951 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 [2021-08-27 13:55:05,959 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:05,959 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:05,959 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:05,960 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:05,960 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:05,960 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:05,961 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:05,962 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:05,967 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 13:55:05,967 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 13:55:05,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:05,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:05,969 INFO L229 MonitoredProcess]: Starting monitored process 15 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) [2021-08-27 13:55:05,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 13:55:05,974 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:05,974 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:05,974 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:05,975 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2021-08-27 13:55:05,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:05,993 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:06,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:06,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:06,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 13:55:06,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:06,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:06,182 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 [2021-08-27 13:55:06,183 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) [2021-08-27 13:55:06,339 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. [2021-08-27 13:55:06,339 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 [2021-08-27 13:55:06,341 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) [2021-08-27 13:55:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2021-08-27 13:55:06,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 6 letters. [2021-08-27 13:55:06,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:06,344 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 8 letters. Loop has 6 letters. [2021-08-27 13:55:06,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:06,344 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 12 letters. [2021-08-27 13:55:06,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:06,345 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2021-08-27 13:55:06,349 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-08-27 13:55:06,354 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 45 states and 59 transitions. [2021-08-27 13:55:06,355 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2021-08-27 13:55:06,355 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2021-08-27 13:55:06,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 59 transitions. [2021-08-27 13:55:06,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:06,357 INFO L681 BuchiCegarLoop]: Abstraction has 45 states and 59 transitions. [2021-08-27 13:55:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 59 transitions. [2021-08-27 13:55:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-08-27 13:55:06,378 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) [2021-08-27 13:55:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-08-27 13:55:06,380 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-08-27 13:55:06,380 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-08-27 13:55:06,380 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 13:55:06,380 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 56 transitions. [2021-08-27 13:55:06,382 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-08-27 13:55:06,382 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:06,382 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:06,383 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:06,383 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:06,383 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 [2021-08-27 13:55:06,383 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 [2021-08-27 13:55:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:06,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1661600137, now seen corresponding path program 1 times [2021-08-27 13:55:06,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:06,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466385765] [2021-08-27 13:55:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:06,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:06,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 13:55:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 13:55:06,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:55:06,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466385765] [2021-08-27 13:55:06,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466385765] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 13:55:06,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 13:55:06,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 13:55:06,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383021636] [2021-08-27 13:55:06,465 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 13:55:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:06,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1499912510, now seen corresponding path program 1 times [2021-08-27 13:55:06,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:06,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010503968] [2021-08-27 13:55:06,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:06,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:06,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 13:55:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 13:55:06,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:55:06,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010503968] [2021-08-27 13:55:06,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010503968] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 13:55:06,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 13:55:06,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 13:55:06,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869095217] [2021-08-27 13:55:06,499 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 13:55:06,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:55:06,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 13:55:06,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 13:55:06,503 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) [2021-08-27 13:55:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:55:06,547 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2021-08-27 13:55:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 13:55:06,548 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 59 transitions. [2021-08-27 13:55:06,550 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-08-27 13:55:06,551 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 44 states and 55 transitions. [2021-08-27 13:55:06,551 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2021-08-27 13:55:06,551 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2021-08-27 13:55:06,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 55 transitions. [2021-08-27 13:55:06,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:06,552 INFO L681 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-08-27 13:55:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states and 55 transitions. [2021-08-27 13:55:06,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-27 13:55:06,556 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) [2021-08-27 13:55:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-08-27 13:55:06,557 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-08-27 13:55:06,557 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-08-27 13:55:06,557 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 13:55:06,557 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2021-08-27 13:55:06,558 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2021-08-27 13:55:06,558 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:06,558 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:06,559 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:06,559 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:06,560 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 [2021-08-27 13:55:06,560 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 [2021-08-27 13:55:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:06,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1603563642, now seen corresponding path program 1 times [2021-08-27 13:55:06,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:06,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647667603] [2021-08-27 13:55:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:06,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:06,569 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:06,578 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:06,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:06,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1170922075, now seen corresponding path program 1 times [2021-08-27 13:55:06,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:06,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831819678] [2021-08-27 13:55:06,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:06,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:06,587 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:06,603 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash 878037024, now seen corresponding path program 1 times [2021-08-27 13:55:06,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:06,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931519397] [2021-08-27 13:55:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:06,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:06,627 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:06,654 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:07,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 01:55:07 BoogieIcfgContainer [2021-08-27 13:55:07,428 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 13:55:07,428 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 13:55:07,428 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 13:55:07,429 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 13:55:07,429 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:55:04" (3/4) ... [2021-08-27 13:55:07,431 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-08-27 13:55:07,457 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 13:55:07,458 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 13:55:07,459 INFO L168 Benchmark]: Toolchain (without parser) took 3400.20 ms. Allocated memory was 60.8 MB in the beginning and 92.3 MB in the end (delta: 31.5 MB). Free memory was 39.1 MB in the beginning and 68.4 MB in the end (delta: -29.3 MB). Peak memory consumption was 1.8 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:07,459 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 60.8 MB. Free memory was 41.6 MB in the beginning and 41.5 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:55:07,460 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.14 ms. Allocated memory is still 60.8 MB. Free memory was 38.9 MB in the beginning and 30.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:07,460 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.12 ms. Allocated memory is still 60.8 MB. Free memory was 30.5 MB in the beginning and 29.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:55:07,460 INFO L168 Benchmark]: Boogie Preprocessor took 57.11 ms. Allocated memory is still 60.8 MB. Free memory was 29.2 MB in the beginning and 44.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:07,461 INFO L168 Benchmark]: RCFGBuilder took 261.50 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 34.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:07,461 INFO L168 Benchmark]: BuchiAutomizer took 2880.09 ms. Allocated memory was 60.8 MB in the beginning and 92.3 MB in the end (delta: 31.5 MB). Free memory was 34.4 MB in the beginning and 70.5 MB in the end (delta: -36.1 MB). Peak memory consumption was 32.5 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:07,461 INFO L168 Benchmark]: Witness Printer took 29.36 ms. Allocated memory is still 92.3 MB. Free memory was 70.5 MB in the beginning and 68.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:07,463 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 60.8 MB. Free memory was 41.6 MB in the beginning and 41.5 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 145.14 ms. Allocated memory is still 60.8 MB. Free memory was 38.9 MB in the beginning and 30.5 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 20.12 ms. Allocated memory is still 60.8 MB. Free memory was 30.5 MB in the beginning and 29.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.11 ms. Allocated memory is still 60.8 MB. Free memory was 29.2 MB in the beginning and 44.3 MB in the end (delta: -15.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 261.50 ms. Allocated memory is still 60.8 MB. Free memory was 44.1 MB in the beginning and 34.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 2880.09 ms. Allocated memory was 60.8 MB in the beginning and 92.3 MB in the end (delta: 31.5 MB). Free memory was 34.4 MB in the beginning and 70.5 MB in the end (delta: -36.1 MB). Peak memory consumption was 32.5 MB. Max. memory is 16.1 GB. * Witness Printer took 29.36 ms. Allocated memory is still 92.3 MB. Free memory was 70.5 MB in the beginning and 68.4 MB in the end (delta: 2.1 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 2.8s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 2.2s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 2. Automata minimization 17.5ms 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, 76.7ms 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: 40ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - 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@4442135a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@314c6256=0, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2c7cefe0=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4a95805b=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2743ea84=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1a5ddfeb=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! [2021-08-27 13:55:07,512 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...