./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.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/NestedRecursion_1d.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 0837a1e1d82be1b28ccf3514392f1b01c88a9160 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 13:55:16,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 13:55:16,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 13:55:16,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 13:55:16,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 13:55:16,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 13:55:16,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 13:55:16,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 13:55:16,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 13:55:16,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 13:55:16,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 13:55:16,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 13:55:16,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 13:55:16,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 13:55:16,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 13:55:16,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 13:55:16,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 13:55:16,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 13:55:16,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 13:55:16,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 13:55:16,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 13:55:16,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 13:55:16,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 13:55:16,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 13:55:16,284 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 13:55:16,285 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 13:55:16,285 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 13:55:16,286 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 13:55:16,286 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 13:55:16,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 13:55:16,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 13:55:16,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 13:55:16,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 13:55:16,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 13:55:16,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 13:55:16,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 13:55:16,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 13:55:16,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 13:55:16,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 13:55:16,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 13:55:16,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 13:55:16,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 13:55:16,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 13:55:16,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 13:55:16,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 13:55:16,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 13:55:16,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 13:55:16,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 13:55:16,318 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 13:55:16,318 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 13:55:16,319 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 13:55:16,319 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 13:55:16,319 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 13:55:16,319 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 13:55:16,319 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 13:55:16,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 13:55:16,320 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 13:55:16,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 13:55:16,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 13:55:16,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 13:55:16,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 13:55:16,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 13:55:16,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 13:55:16,321 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 13:55:16,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 13:55:16,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 13:55:16,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 13:55:16,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 13:55:16,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 13:55:16,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 13:55:16,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 13:55:16,323 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 13:55:16,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2021-08-27 13:55:16,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 13:55:16,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 13:55:16,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 13:55:16,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 13:55:16,628 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 13:55:16,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2021-08-27 13:55:16,702 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38dfa6f28/6b6686cec1184eef98ec4e3af5071d43/FLAG00acc70c3 [2021-08-27 13:55:17,131 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 13:55:17,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2021-08-27 13:55:17,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38dfa6f28/6b6686cec1184eef98ec4e3af5071d43/FLAG00acc70c3 [2021-08-27 13:55:17,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38dfa6f28/6b6686cec1184eef98ec4e3af5071d43 [2021-08-27 13:55:17,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 13:55:17,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 13:55:17,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 13:55:17,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 13:55:17,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 13:55:17,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e858d93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17, skipping insertion in model container [2021-08-27 13:55:17,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 13:55:17,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 13:55:17,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:55:17,701 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 13:55:17,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:55:17,718 INFO L208 MainTranslator]: Completed translation [2021-08-27 13:55:17,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17 WrapperNode [2021-08-27 13:55:17,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 13:55:17,719 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 13:55:17,719 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 13:55:17,720 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 13:55:17,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 13:55:17,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 13:55:17,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 13:55:17,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 13:55:17,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 13:55:17,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 13:55:17,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 13:55:17,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 13:55:17,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (1/1) ... [2021-08-27 13:55:17,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:17,818 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 13:55:17,850 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 13:55:17,869 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-08-27 13:55:17,869 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-08-27 13:55:17,869 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-08-27 13:55:17,869 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-08-27 13:55:17,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 13:55:17,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 13:55:18,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 13:55:18,055 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 13:55:18,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:55:18 BoogieIcfgContainer [2021-08-27 13:55:18,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 13:55:18,058 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 13:55:18,058 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 13:55:18,061 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 13:55:18,062 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:55:18,062 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 01:55:17" (1/3) ... [2021-08-27 13:55:18,063 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@180040b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:55:18, skipping insertion in model container [2021-08-27 13:55:18,063 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:55:18,064 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:55:17" (2/3) ... [2021-08-27 13:55:18,064 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@180040b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:55:18, skipping insertion in model container [2021-08-27 13:55:18,064 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:55:18,064 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:55:18" (3/3) ... [2021-08-27 13:55:18,066 INFO L389 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d.c [2021-08-27 13:55:18,123 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 13:55:18,123 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 13:55:18,123 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 13:55:18,124 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 13:55:18,124 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 13:55:18,124 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 13:55:18,124 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 13:55:18,124 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 13:55:18,140 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 13:55:18,165 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:18,166 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:18,166 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:18,171 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:55:18,171 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:18,171 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 13:55:18,172 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 13:55:18,176 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:18,177 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:18,177 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:18,177 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:55:18,178 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:18,183 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 10#L25true call main_#t~ret6 := rec2(main_~x~0);< 16#rec2ENTRYtrue [2021-08-27 13:55:18,184 INFO L793 eck$LassoCheckResult]: Loop: 16#rec2ENTRYtrue ~j := #in~j; 17#L18true assume !(~j <= 0); 20#L20true call #t~ret3 := rec1(~j);< 22#rec1ENTRYtrue ~i := #in~i; 18#L12true assume ~i <= 0;#res := 0; 14#rec1FINALtrue assume true; 15#rec1EXITtrue >#33#return; 4#L20-1true call #t~ret4 := rec2(#t~ret3 - 1);< 16#rec2ENTRYtrue [2021-08-27 13:55:18,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:18,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2021-08-27 13:55:18,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:18,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560355821] [2021-08-27 13:55:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:18,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:18,258 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:18,282 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:18,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:18,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2021-08-27 13:55:18,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:18,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32370341] [2021-08-27 13:55:18,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:18,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:18,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 13:55:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:18,487 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 13:55:18,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:55:18,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32370341] [2021-08-27 13:55:18,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32370341] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 13:55:18,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 13:55:18,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 13:55:18,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293248739] [2021-08-27 13:55:18,494 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 13:55:18,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:55:18,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 13:55:18,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 13:55:18,515 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 13:55:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:55:18,628 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-08-27 13:55:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 13:55:18,630 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 33 transitions. [2021-08-27 13:55:18,637 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:18,644 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 16 states and 22 transitions. [2021-08-27 13:55:18,645 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2021-08-27 13:55:18,646 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-08-27 13:55:18,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2021-08-27 13:55:18,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 13:55:18,649 INFO L681 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-08-27 13:55:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2021-08-27 13:55:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-27 13:55:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-08-27 13:55:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-08-27 13:55:18,673 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-08-27 13:55:18,673 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-08-27 13:55:18,673 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 13:55:18,674 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2021-08-27 13:55:18,676 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:18,676 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:18,676 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:18,678 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:55:18,678 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:18,679 INFO L791 eck$LassoCheckResult]: Stem: 66#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 64#L25 call main_#t~ret6 := rec2(main_~x~0);< 65#rec2ENTRY [2021-08-27 13:55:18,679 INFO L793 eck$LassoCheckResult]: Loop: 65#rec2ENTRY ~j := #in~j; 76#L18 assume !(~j <= 0); 68#L20 call #t~ret3 := rec1(~j);< 73#rec1ENTRY ~i := #in~i; 77#L12 assume !(~i <= 0); 69#L14 call #t~ret0 := rec1(~i - 2);< 73#rec1ENTRY ~i := #in~i; 77#L12 assume ~i <= 0;#res := 0; 74#rec1FINAL assume true; 75#rec1EXIT >#27#return; 70#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 73#rec1ENTRY ~i := #in~i; 77#L12 assume ~i <= 0;#res := 0; 74#rec1FINAL assume true; 75#rec1EXIT >#29#return; 71#L14-2 call #t~ret2 := rec1(#t~ret1);< 73#rec1ENTRY ~i := #in~i; 77#L12 assume ~i <= 0;#res := 0; 74#rec1FINAL assume true; 75#rec1EXIT >#31#return; 67#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 72#rec1FINAL assume true; 78#rec1EXIT >#33#return; 63#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 65#rec2ENTRY [2021-08-27 13:55:18,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 2 times [2021-08-27 13:55:18,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:18,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528255043] [2021-08-27 13:55:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:18,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:18,688 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:18,693 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:18,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash -616266826, now seen corresponding path program 1 times [2021-08-27 13:55:18,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:18,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689651674] [2021-08-27 13:55:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:18,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:18,727 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:18,757 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:18,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1277860358, now seen corresponding path program 1 times [2021-08-27 13:55:18,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:18,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685643961] [2021-08-27 13:55:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:18,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:18,790 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:18,806 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:19,300 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:19,300 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:19,300 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:19,300 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:19,301 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:19,301 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,301 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:19,301 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:19,301 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2021-08-27 13:55:19,301 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:19,301 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:19,312 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 13:55:19,317 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 13:55:19,319 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 13:55:19,321 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 13:55:19,325 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 13:55:19,362 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:19,362 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:19,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,369 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 13:55:19,375 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 13:55:19,376 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:19,376 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:19,399 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:19,399 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:19,418 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 13:55:19,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,422 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 13:55:19,426 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 13:55:19,426 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:19,426 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:19,437 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:19,437 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:19,452 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 13:55:19,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,461 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 13:55:19,469 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:19,469 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:19,490 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 13:55:19,491 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:19,491 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:19,509 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 13:55:19,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,510 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 13:55:19,519 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:19,519 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:19,528 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 13:55:19,545 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:19,545 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:19,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:19,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,571 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 13:55:19,572 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 13:55:19,572 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:19,572 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:19,626 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 13:55:19,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,627 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 13:55:19,628 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 13:55:19,629 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:19,629 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:19,640 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:19,656 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 13:55:19,656 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:19,657 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:19,657 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:19,657 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:19,657 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:19,657 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,657 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:19,657 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:19,657 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration2_Loop [2021-08-27 13:55:19,657 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:19,657 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:19,658 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 13:55:19,671 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 13:55:19,674 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 13:55:19,679 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 13:55:19,685 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 13:55:19,719 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:19,723 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:19,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,729 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 13:55:19,731 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 13:55:19,733 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 13:55:19,741 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:19,741 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:19,741 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:19,741 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:19,742 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:19,744 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:19,744 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:19,761 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:19,787 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 13:55:19,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,789 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 13:55:19,800 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 13:55:19,808 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:19,808 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:19,809 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:19,809 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:19,809 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:19,810 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:19,810 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:19,812 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 13:55:19,820 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:19,846 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 13:55:19,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,848 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 13:55:19,852 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 13:55:19,854 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:55:19,861 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:19,861 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:19,861 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:19,861 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:19,861 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:19,862 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:19,862 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:19,872 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:19,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:19,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,900 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 13:55:19,904 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 13:55:19,904 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 13:55:19,911 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:19,911 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:19,911 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:19,911 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:19,911 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:19,915 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:19,915 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:19,927 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:19,931 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 13:55:19,931 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 13:55:19,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:19,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:19,941 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 13:55:19,942 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 13:55:19,943 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:19,943 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:19,943 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:19,944 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2021-08-27 13:55:19,967 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 13:55:19,968 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:19,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:55:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:20,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-27 13:55:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:20,207 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 13:55:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-27 13:55:20,326 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2021-08-27 13:55:20,327 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8 Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:20,690 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Result 101 states and 147 transitions. Complement of second has 42 states. [2021-08-27 13:55:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:20,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2021-08-27 13:55:20,694 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 24 letters. [2021-08-27 13:55:20,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:20,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 26 letters. Loop has 24 letters. [2021-08-27 13:55:20,696 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:20,696 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 48 letters. [2021-08-27 13:55:20,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:20,699 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 147 transitions. [2021-08-27 13:55:20,703 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:20,707 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 89 states and 135 transitions. [2021-08-27 13:55:20,707 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2021-08-27 13:55:20,707 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2021-08-27 13:55:20,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 135 transitions. [2021-08-27 13:55:20,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:20,709 INFO L681 BuchiCegarLoop]: Abstraction has 89 states and 135 transitions. [2021-08-27 13:55:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states and 135 transitions. [2021-08-27 13:55:20,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2021-08-27 13:55:20,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 20 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (41), 18 states have call predecessors, (41), 16 states have call successors, (41) [2021-08-27 13:55:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 98 transitions. [2021-08-27 13:55:20,723 INFO L704 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2021-08-27 13:55:20,723 INFO L587 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2021-08-27 13:55:20,724 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 13:55:20,724 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 98 transitions. [2021-08-27 13:55:20,725 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:20,725 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:20,725 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:20,725 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:20,725 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 13:55:20,726 INFO L791 eck$LassoCheckResult]: Stem: 343#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 340#L25 call main_#t~ret6 := rec2(main_~x~0);< 362#rec2ENTRY ~j := #in~j; 373#L18 assume !(~j <= 0); 370#L20 call #t~ret3 := rec1(~j);< 382#rec1ENTRY ~i := #in~i; 374#L12 assume !(~i <= 0); 347#L14 call #t~ret0 := rec1(~i - 2);< 363#rec1ENTRY [2021-08-27 13:55:20,726 INFO L793 eck$LassoCheckResult]: Loop: 363#rec1ENTRY ~i := #in~i; 376#L12 assume !(~i <= 0); 345#L14 call #t~ret0 := rec1(~i - 2);< 363#rec1ENTRY [2021-08-27 13:55:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:20,726 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2021-08-27 13:55:20,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:20,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79716892] [2021-08-27 13:55:20,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:20,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:20,732 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:20,736 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:20,737 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2021-08-27 13:55:20,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:20,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186695492] [2021-08-27 13:55:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:20,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:20,741 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:20,743 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:20,744 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2021-08-27 13:55:20,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:20,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557396509] [2021-08-27 13:55:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:20,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:20,749 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:20,754 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:20,797 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:20,797 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:20,797 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:20,798 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:20,798 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:20,798 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:20,798 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:20,798 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:20,798 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2021-08-27 13:55:20,798 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:20,798 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:20,799 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 13:55:20,801 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 13:55:20,806 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 13:55:20,809 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 13:55:20,812 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 13:55:20,817 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 13:55:20,847 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:20,848 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:20,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:20,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:20,849 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 13:55:20,858 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:20,858 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:20,867 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 13:55:20,867 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:20,868 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:20,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:20,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:20,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:20,886 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 13:55:20,887 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 13:55:20,888 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:20,888 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:20,895 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:20,896 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:20,911 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 13:55:20,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:20,914 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 13:55:20,914 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 13:55:20,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:20,916 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:20,923 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:20,923 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:20,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-08-27 13:55:20,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:20,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:20,939 INFO L229 MonitoredProcess]: Starting monitored process 16 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 13:55:20,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-27 13:55:20,941 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:20,941 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:20,949 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:20,950 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:20,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:20,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:20,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:20,975 INFO L229 MonitoredProcess]: Starting monitored process 17 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 13:55:20,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-27 13:55:20,977 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:20,977 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:21,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:21,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,037 INFO L229 MonitoredProcess]: Starting monitored process 18 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 13:55:21,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-27 13:55:21,050 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:21,050 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:21,117 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:21,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:21,120 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:21,120 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:21,120 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:21,120 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:21,120 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:21,121 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,121 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:21,121 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:21,121 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration3_Loop [2021-08-27 13:55:21,121 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:21,121 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:21,122 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 13:55:21,124 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 13:55:21,126 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 13:55:21,128 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 13:55:21,133 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 13:55:21,135 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 13:55:21,175 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:21,175 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:21,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,177 INFO L229 MonitoredProcess]: Starting monitored process 19 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 13:55:21,186 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 13:55:21,194 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:21,195 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:21,195 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:21,195 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:21,195 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:21,195 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:21,195 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:21,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-27 13:55:21,209 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:21,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:21,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,237 INFO L229 MonitoredProcess]: Starting monitored process 20 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 13:55:21,244 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 13:55:21,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-08-27 13:55:21,250 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:21,251 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:21,251 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:21,251 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:21,251 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:21,251 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:21,251 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:21,252 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:21,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:21,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,270 INFO L229 MonitoredProcess]: Starting monitored process 21 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 13:55:21,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-08-27 13:55:21,278 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 13:55:21,284 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:21,284 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:21,284 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:21,284 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:21,285 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:21,286 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:21,286 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:21,292 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:21,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:21,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,310 INFO L229 MonitoredProcess]: Starting monitored process 22 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 13:55:21,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-08-27 13:55:21,312 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 13:55:21,318 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:21,319 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:21,319 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:21,319 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:21,319 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:21,320 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:21,320 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:21,321 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:21,323 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 13:55:21,323 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:55:21,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,324 INFO L229 MonitoredProcess]: Starting monitored process 23 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 13:55:21,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-08-27 13:55:21,326 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:21,326 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:21,326 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:21,326 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-08-27 13:55:21,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2021-08-27 13:55:21,344 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:21,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 13:55:21,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:21,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:21,504 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 13:55:21,505 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-08-27 13:55:21,505 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40 Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:21,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:21,553 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 108 states and 165 transitions. Complement of second has 13 states. [2021-08-27 13:55:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:55:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2021-08-27 13:55:21,554 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 3 letters. [2021-08-27 13:55:21,555 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:21,555 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 11 letters. Loop has 3 letters. [2021-08-27 13:55:21,555 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:21,555 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 6 letters. [2021-08-27 13:55:21,555 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:21,555 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 165 transitions. [2021-08-27 13:55:21,559 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:21,562 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 96 states and 153 transitions. [2021-08-27 13:55:21,562 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2021-08-27 13:55:21,562 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2021-08-27 13:55:21,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 153 transitions. [2021-08-27 13:55:21,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:21,563 INFO L681 BuchiCegarLoop]: Abstraction has 96 states and 153 transitions. [2021-08-27 13:55:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 153 transitions. [2021-08-27 13:55:21,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-08-27 13:55:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 59 states have internal predecessors, (61), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (56), 18 states have call predecessors, (56), 22 states have call successors, (56) [2021-08-27 13:55:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 143 transitions. [2021-08-27 13:55:21,573 INFO L704 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2021-08-27 13:55:21,573 INFO L587 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2021-08-27 13:55:21,573 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 13:55:21,573 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 143 transitions. [2021-08-27 13:55:21,577 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:21,577 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:21,577 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:21,577 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:21,577 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 13:55:21,577 INFO L791 eck$LassoCheckResult]: Stem: 579#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 575#L25 call main_#t~ret6 := rec2(main_~x~0);< 588#rec2ENTRY ~j := #in~j; 653#L18 assume !(~j <= 0); 581#L20 call #t~ret3 := rec1(~j);< 661#rec1ENTRY ~i := #in~i; 660#L12 assume !(~i <= 0); 619#L14 call #t~ret0 := rec1(~i - 2);< 659#rec1ENTRY ~i := #in~i; 663#L12 assume ~i <= 0;#res := 0; 658#rec1FINAL assume true; 651#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 590#rec1ENTRY [2021-08-27 13:55:21,578 INFO L793 eck$LassoCheckResult]: Loop: 590#rec1ENTRY ~i := #in~i; 662#L12 assume !(~i <= 0); 607#L14 call #t~ret0 := rec1(~i - 2);< 590#rec1ENTRY [2021-08-27 13:55:21,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:21,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2021-08-27 13:55:21,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:21,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983025894] [2021-08-27 13:55:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:21,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:21,587 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:21,591 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:21,592 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2021-08-27 13:55:21,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:21,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929625854] [2021-08-27 13:55:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:21,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:21,594 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:21,596 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2021-08-27 13:55:21,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:21,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905069052] [2021-08-27 13:55:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:21,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:21,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 13:55:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 13:55:21,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:55:21,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905069052] [2021-08-27 13:55:21,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905069052] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 13:55:21,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 13:55:21,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 13:55:21,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478529809] [2021-08-27 13:55:21,691 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:21,692 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:21,692 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:21,692 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:21,692 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:21,692 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,692 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:21,692 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:21,692 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2021-08-27 13:55:21,692 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:21,692 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:21,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:21,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:55:21,698 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 13:55:21,700 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 13:55:21,705 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 13:55:21,707 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 13:55:21,735 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:21,735 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:21,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,736 INFO L229 MonitoredProcess]: Starting monitored process 24 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 13:55:21,746 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:21,746 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:21,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-08-27 13:55:21,769 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:21,769 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:21,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:21,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,793 INFO L229 MonitoredProcess]: Starting monitored process 25 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 13:55:21,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-08-27 13:55:21,841 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:21,841 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:21,862 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:21,862 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:21,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:21,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,878 INFO L229 MonitoredProcess]: Starting monitored process 26 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 13:55:21,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-08-27 13:55:21,881 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:21,881 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:21,888 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:21,888 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:21,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:21,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,913 INFO L229 MonitoredProcess]: Starting monitored process 27 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 13:55:21,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-08-27 13:55:21,915 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:21,915 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:21,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2021-08-27 13:55:21,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:21,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:21,937 INFO L229 MonitoredProcess]: Starting monitored process 28 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 13:55:21,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-08-27 13:55:21,940 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:21,940 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:22,009 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:22,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:22,013 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:22,013 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:22,013 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:22,013 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:22,013 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:22,013 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:22,013 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:22,013 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:22,013 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration4_Loop [2021-08-27 13:55:22,013 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:22,013 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:22,014 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 13:55:22,017 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 13:55:22,019 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 13:55:22,036 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 13:55:22,038 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 13:55:22,040 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 13:55:22,077 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:22,077 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:22,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:22,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:22,089 INFO L229 MonitoredProcess]: Starting monitored process 29 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 13:55:22,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-08-27 13:55:22,093 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 13:55:22,100 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:22,100 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:22,101 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:22,101 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:22,101 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:22,101 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:22,101 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:22,116 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:22,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:22,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:22,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:22,145 INFO L229 MonitoredProcess]: Starting monitored process 30 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 13:55:22,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-08-27 13:55:22,148 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 13:55:22,156 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:22,156 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:22,157 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:22,157 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:22,157 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:22,157 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:22,157 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:22,172 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:22,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:22,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:22,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:22,204 INFO L229 MonitoredProcess]: Starting monitored process 31 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 13:55:22,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-08-27 13:55:22,206 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 13:55:22,214 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:22,214 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:22,214 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:22,214 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:22,214 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:22,215 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:22,215 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:22,228 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:22,230 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 13:55:22,231 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:55:22,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:22,232 INFO L229 MonitoredProcess]: Starting monitored process 32 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 13:55:22,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-08-27 13:55:22,234 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:22,234 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:22,234 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:22,234 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-08-27 13:55:22,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:22,262 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 13:55:22,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:22,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:22,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:22,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:22,484 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 13:55:22,485 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-08-27 13:55:22,485 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 13:55:22,571 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 132 states and 207 transitions. Complement of second has 14 states. [2021-08-27 13:55:22,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 13:55:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2021-08-27 13:55:22,573 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 3 letters. [2021-08-27 13:55:22,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:22,573 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 16 letters. Loop has 3 letters. [2021-08-27 13:55:22,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:22,573 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 6 letters. [2021-08-27 13:55:22,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:22,573 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 132 states and 207 transitions. [2021-08-27 13:55:22,576 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:22,579 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 132 states to 120 states and 195 transitions. [2021-08-27 13:55:22,580 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2021-08-27 13:55:22,580 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2021-08-27 13:55:22,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 195 transitions. [2021-08-27 13:55:22,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:22,580 INFO L681 BuchiCegarLoop]: Abstraction has 120 states and 195 transitions. [2021-08-27 13:55:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states and 195 transitions. [2021-08-27 13:55:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2021-08-27 13:55:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 75 states have internal predecessors, (79), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (74), 22 states have call predecessors, (74), 28 states have call successors, (74) [2021-08-27 13:55:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 185 transitions. [2021-08-27 13:55:22,592 INFO L704 BuchiCegarLoop]: Abstraction has 116 states and 185 transitions. [2021-08-27 13:55:22,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:55:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 13:55:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 13:55:22,592 INFO L87 Difference]: Start difference. First operand 116 states and 185 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 13:55:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:55:22,631 INFO L93 Difference]: Finished difference Result 129 states and 195 transitions. [2021-08-27 13:55:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 13:55:22,632 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 129 states and 195 transitions. [2021-08-27 13:55:22,634 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2021-08-27 13:55:22,637 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 129 states to 127 states and 193 transitions. [2021-08-27 13:55:22,637 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2021-08-27 13:55:22,638 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2021-08-27 13:55:22,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 193 transitions. [2021-08-27 13:55:22,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:22,638 INFO L681 BuchiCegarLoop]: Abstraction has 127 states and 193 transitions. [2021-08-27 13:55:22,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 193 transitions. [2021-08-27 13:55:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2021-08-27 13:55:22,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 65 states have internal predecessors, (67), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (60), 22 states have call predecessors, (60), 26 states have call successors, (60) [2021-08-27 13:55:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 157 transitions. [2021-08-27 13:55:22,647 INFO L704 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2021-08-27 13:55:22,647 INFO L587 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2021-08-27 13:55:22,647 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 13:55:22,648 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 104 states and 157 transitions. [2021-08-27 13:55:22,649 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-08-27 13:55:22,649 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:22,649 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:22,649 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:22,650 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:22,650 INFO L791 eck$LassoCheckResult]: Stem: 1145#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1141#L25 call main_#t~ret6 := rec2(main_~x~0);< 1168#rec2ENTRY ~j := #in~j; 1207#L18 assume !(~j <= 0); 1169#L20 call #t~ret3 := rec1(~j);< 1206#rec1ENTRY ~i := #in~i; 1205#L12 assume !(~i <= 0); 1152#L14 call #t~ret0 := rec1(~i - 2);< 1203#rec1ENTRY ~i := #in~i; 1201#L12 assume !(~i <= 0); 1149#L14 call #t~ret0 := rec1(~i - 2);< 1200#rec1ENTRY ~i := #in~i; 1202#L12 assume ~i <= 0;#res := 0; 1241#rec1FINAL assume true; 1240#rec1EXIT >#27#return; 1173#L14-1 [2021-08-27 13:55:22,650 INFO L793 eck$LassoCheckResult]: Loop: 1173#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1174#rec1ENTRY ~i := #in~i; 1189#L12 assume ~i <= 0;#res := 0; 1177#rec1FINAL assume true; 1179#rec1EXIT >#29#return; 1150#L14-2 call #t~ret2 := rec1(#t~ret1);< 1171#rec1ENTRY ~i := #in~i; 1215#L12 assume !(~i <= 0); 1153#L14 call #t~ret0 := rec1(~i - 2);< 1171#rec1ENTRY ~i := #in~i; 1215#L12 assume ~i <= 0;#res := 0; 1235#rec1FINAL assume true; 1234#rec1EXIT >#27#return; 1173#L14-1 [2021-08-27 13:55:22,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:22,650 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2021-08-27 13:55:22,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:22,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183831853] [2021-08-27 13:55:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:22,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:22,655 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:22,669 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2021-08-27 13:55:22,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:22,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762421892] [2021-08-27 13:55:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:22,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:22,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 13:55:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:22,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-08-27 13:55:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 13:55:22,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:55:22,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762421892] [2021-08-27 13:55:22,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762421892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 13:55:22,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709183767] [2021-08-27 13:55:22,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:22,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 13:55:22,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:22,710 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 13:55:22,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-27 13:55:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:22,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 13:55:22,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:55:22,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709183767] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 13:55:22,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 13:55:22,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-08-27 13:55:22,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474299765] [2021-08-27 13:55:22,827 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 13:55:22,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:55:22,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 13:55:22,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 13:55:22,828 INFO L87 Difference]: Start difference. First operand 104 states and 157 transitions. cyclomatic complexity: 59 Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 13:55:22,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:55:22,869 INFO L93 Difference]: Finished difference Result 119 states and 173 transitions. [2021-08-27 13:55:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 13:55:22,869 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 173 transitions. [2021-08-27 13:55:22,871 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:22,873 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 114 states and 164 transitions. [2021-08-27 13:55:22,873 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2021-08-27 13:55:22,874 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2021-08-27 13:55:22,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 164 transitions. [2021-08-27 13:55:22,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:22,874 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 164 transitions. [2021-08-27 13:55:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 164 transitions. [2021-08-27 13:55:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2021-08-27 13:55:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 68 states have internal predecessors, (70), 32 states have call successors, (32), 18 states have call predecessors, (32), 16 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2021-08-27 13:55:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2021-08-27 13:55:22,882 INFO L704 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2021-08-27 13:55:22,882 INFO L587 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2021-08-27 13:55:22,882 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-08-27 13:55:22,882 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 161 transitions. [2021-08-27 13:55:22,883 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2021-08-27 13:55:22,883 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:22,883 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:22,884 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:22,884 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 13:55:22,884 INFO L791 eck$LassoCheckResult]: Stem: 1427#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1423#L25 call main_#t~ret6 := rec2(main_~x~0);< 1443#rec2ENTRY ~j := #in~j; 1498#L18 assume !(~j <= 0); 1480#L20 call #t~ret3 := rec1(~j);< 1496#rec1ENTRY ~i := #in~i; 1490#L12 assume !(~i <= 0); 1434#L14 call #t~ret0 := rec1(~i - 2);< 1486#rec1ENTRY ~i := #in~i; 1483#L12 assume !(~i <= 0); 1431#L14 call #t~ret0 := rec1(~i - 2);< 1482#rec1ENTRY ~i := #in~i; 1485#L12 assume ~i <= 0;#res := 0; 1461#rec1FINAL assume true; 1462#rec1EXIT >#27#return; 1457#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1458#rec1ENTRY ~i := #in~i; 1501#L12 assume ~i <= 0;#res := 0; 1500#rec1FINAL assume true; 1487#rec1EXIT >#29#return; 1444#L14-2 call #t~ret2 := rec1(#t~ret1);< 1445#rec1ENTRY ~i := #in~i; 1471#L12 assume ~i <= 0;#res := 0; 1472#rec1FINAL assume true; 1464#rec1EXIT >#31#return; 1465#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1492#rec1FINAL assume true; 1488#rec1EXIT >#27#return; 1435#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1475#rec1ENTRY [2021-08-27 13:55:22,884 INFO L793 eck$LassoCheckResult]: Loop: 1475#rec1ENTRY ~i := #in~i; 1503#L12 assume !(~i <= 0); 1432#L14 call #t~ret0 := rec1(~i - 2);< 1475#rec1ENTRY [2021-08-27 13:55:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2021-08-27 13:55:22,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:22,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889608395] [2021-08-27 13:55:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:22,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:22,901 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:22,922 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:22,923 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2021-08-27 13:55:22,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:22,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355793733] [2021-08-27 13:55:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:22,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:22,926 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:22,928 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:22,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:22,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2050992272, now seen corresponding path program 2 times [2021-08-27 13:55:22,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:22,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258001230] [2021-08-27 13:55:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:22,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:22,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 13:55:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:23,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 13:55:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:23,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 13:55:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:23,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 13:55:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-27 13:55:23,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:55:23,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258001230] [2021-08-27 13:55:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258001230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 13:55:23,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45190070] [2021-08-27 13:55:23,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 13:55:23,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 13:55:23,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,066 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 13:55:23,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-27 13:55:23,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 13:55:23,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 13:55:23,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-27 13:55:23,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45190070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 13:55:23,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 13:55:23,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-27 13:55:23,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961324414] [2021-08-27 13:55:23,291 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:23,291 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:23,291 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:23,291 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:23,291 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:23,291 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,291 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:23,291 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:23,291 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2021-08-27 13:55:23,292 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:23,292 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:23,293 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 13:55:23,295 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 13:55:23,297 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 13:55:23,299 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 13:55:23,304 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 13:55:23,306 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 13:55:23,330 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:23,330 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:23,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,333 INFO L229 MonitoredProcess]: Starting monitored process 35 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 13:55:23,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-08-27 13:55:23,335 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:23,335 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:23,347 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:23,347 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:23,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:23,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,364 INFO L229 MonitoredProcess]: Starting monitored process 36 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 13:55:23,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-08-27 13:55:23,366 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:23,366 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:23,374 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:23,374 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:23,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2021-08-27 13:55:23,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,394 INFO L229 MonitoredProcess]: Starting monitored process 37 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 13:55:23,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-08-27 13:55:23,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:23,397 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:23,404 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:23,404 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:23,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:23,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,423 INFO L229 MonitoredProcess]: Starting monitored process 38 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 13:55:23,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-08-27 13:55:23,425 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:23,425 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:23,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2021-08-27 13:55:23,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,449 INFO L229 MonitoredProcess]: Starting monitored process 39 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 13:55:23,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-08-27 13:55:23,451 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:23,451 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:23,517 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:23,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Ended with exit code 0 [2021-08-27 13:55:23,521 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:23,521 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:23,521 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:23,521 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:23,521 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:23,521 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,521 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:23,521 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:23,521 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration6_Loop [2021-08-27 13:55:23,521 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:23,521 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:23,522 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 13:55:23,525 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 13:55:23,541 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 13:55:23,548 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 13:55:23,550 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 13:55:23,552 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 13:55:23,581 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:23,581 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:23,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,585 INFO L229 MonitoredProcess]: Starting monitored process 40 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 13:55:23,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-08-27 13:55:23,588 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 13:55:23,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:23,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:23,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:23,595 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:23,595 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:23,595 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:23,595 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:23,597 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:23,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Ended with exit code 0 [2021-08-27 13:55:23,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,613 INFO L229 MonitoredProcess]: Starting monitored process 41 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 13:55:23,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-08-27 13:55:23,615 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 13:55:23,622 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:23,622 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:23,622 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:23,622 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:23,622 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:23,623 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:23,623 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:23,624 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:23,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:23,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,642 INFO L229 MonitoredProcess]: Starting monitored process 42 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 13:55:23,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-08-27 13:55:23,645 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 13:55:23,652 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:23,652 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:23,652 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:23,652 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:23,652 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:23,660 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:23,660 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:23,662 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:23,663 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 13:55:23,664 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:55:23,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:23,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:23,667 INFO L229 MonitoredProcess]: Starting monitored process 43 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 13:55:23,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-08-27 13:55:23,670 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:23,670 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:23,670 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:23,670 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-08-27 13:55:23,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:23,686 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:23,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:23,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:23,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 13:55:23,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:24,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:24,296 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 13:55:24,296 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-08-27 13:55:24,296 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:24,347 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 128 states and 179 transitions. Complement of second has 7 states. [2021-08-27 13:55:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-08-27 13:55:24,349 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2021-08-27 13:55:24,349 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:24,349 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:55:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:24,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 13:55:24,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:24,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:24,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:24,894 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 13:55:24,895 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2021-08-27 13:55:24,895 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:24,942 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 128 states and 179 transitions. Complement of second has 7 states. [2021-08-27 13:55:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-08-27 13:55:24,943 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2021-08-27 13:55:24,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:24,943 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:55:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 13:55:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:25,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:25,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:25,470 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 13:55:25,470 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-08-27 13:55:25,470 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:25,557 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 156 states and 218 transitions. Complement of second has 13 states. [2021-08-27 13:55:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2021-08-27 13:55:25,558 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2021-08-27 13:55:25,559 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:25,559 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2021-08-27 13:55:25,559 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:25,559 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2021-08-27 13:55:25,559 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:25,559 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 156 states and 218 transitions. [2021-08-27 13:55:25,562 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2021-08-27 13:55:25,564 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 156 states to 138 states and 200 transitions. [2021-08-27 13:55:25,564 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2021-08-27 13:55:25,565 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2021-08-27 13:55:25,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 200 transitions. [2021-08-27 13:55:25,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:25,565 INFO L681 BuchiCegarLoop]: Abstraction has 138 states and 200 transitions. [2021-08-27 13:55:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states and 200 transitions. [2021-08-27 13:55:25,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2021-08-27 13:55:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 74 states have internal predecessors, (78), 32 states have call successors, (32), 20 states have call predecessors, (32), 18 states have return successors, (59), 24 states have call predecessors, (59), 28 states have call successors, (59) [2021-08-27 13:55:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2021-08-27 13:55:25,573 INFO L704 BuchiCegarLoop]: Abstraction has 119 states and 169 transitions. [2021-08-27 13:55:25,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:55:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 13:55:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 13:55:25,574 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 13:55:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:55:25,620 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-08-27 13:55:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 13:55:25,620 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 115 transitions. [2021-08-27 13:55:25,622 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:25,622 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 62 states and 74 transitions. [2021-08-27 13:55:25,623 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-08-27 13:55:25,623 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-08-27 13:55:25,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 74 transitions. [2021-08-27 13:55:25,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:55:25,623 INFO L681 BuchiCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-08-27 13:55:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 74 transitions. [2021-08-27 13:55:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-08-27 13:55:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2021-08-27 13:55:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-08-27 13:55:25,626 INFO L704 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-08-27 13:55:25,626 INFO L587 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-08-27 13:55:25,626 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-08-27 13:55:25,626 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 53 states and 64 transitions. [2021-08-27 13:55:25,626 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:55:25,626 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:55:25,626 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:55:25,627 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 13:55:25,627 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 13:55:25,627 INFO L791 eck$LassoCheckResult]: Stem: 2652#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 2650#L25 call main_#t~ret6 := rec2(main_~x~0);< 2659#rec2ENTRY ~j := #in~j; 2668#L18 assume !(~j <= 0); 2682#L20 call #t~ret3 := rec1(~j);< 2696#rec1ENTRY ~i := #in~i; 2695#L12 assume !(~i <= 0); 2656#L14 call #t~ret0 := rec1(~i - 2);< 2693#rec1ENTRY ~i := #in~i; 2698#L12 assume ~i <= 0;#res := 0; 2697#rec1FINAL assume true; 2666#rec1EXIT >#27#return; 2667#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2663#rec1ENTRY ~i := #in~i; 2691#L12 assume ~i <= 0;#res := 0; 2690#rec1FINAL assume true; 2688#rec1EXIT >#29#return; 2686#L14-2 call #t~ret2 := rec1(#t~ret1);< 2661#rec1ENTRY ~i := #in~i; 2689#L12 assume ~i <= 0;#res := 0; 2687#rec1FINAL assume true; 2685#rec1EXIT >#31#return; 2684#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 2683#rec1FINAL assume true; 2681#rec1EXIT >#33#return; 2649#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2651#rec2ENTRY ~j := #in~j; 2670#L18 assume !(~j <= 0); 2671#L20 call #t~ret3 := rec1(~j);< 2677#rec1ENTRY [2021-08-27 13:55:25,627 INFO L793 eck$LassoCheckResult]: Loop: 2677#rec1ENTRY ~i := #in~i; 2673#L12 assume !(~i <= 0); 2674#L14 call #t~ret0 := rec1(~i - 2);< 2677#rec1ENTRY [2021-08-27 13:55:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:25,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1852176490, now seen corresponding path program 2 times [2021-08-27 13:55:25,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:25,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812114643] [2021-08-27 13:55:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:25,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:25,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 13:55:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:25,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 13:55:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:25,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-08-27 13:55:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:25,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-08-27 13:55:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-27 13:55:25,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 13:55:25,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812114643] [2021-08-27 13:55:25,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812114643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 13:55:25,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598224795] [2021-08-27 13:55:25,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 13:55:25,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 13:55:25,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:25,704 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 13:55:25,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-27 13:55:25,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 13:55:25,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 13:55:25,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:25,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-27 13:55:26,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598224795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 13:55:26,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 13:55:26,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-27 13:55:26,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599497022] [2021-08-27 13:55:26,028 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 13:55:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:26,029 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 4 times [2021-08-27 13:55:26,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:55:26,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733336591] [2021-08-27 13:55:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:55:26,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:55:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:26,034 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:55:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:55:26,035 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:55:26,077 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:26,077 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:26,077 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:26,077 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:26,077 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:55:26,078 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,078 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:26,078 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:26,078 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2021-08-27 13:55:26,078 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:26,078 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:26,079 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 13:55:26,081 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 13:55:26,083 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 13:55:26,085 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 13:55:26,087 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 13:55:26,093 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 13:55:26,122 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:26,122 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:55:26,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,123 INFO L229 MonitoredProcess]: Starting monitored process 45 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 13:55:26,129 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:26,129 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:26,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-08-27 13:55:26,149 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:26,149 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:26,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2021-08-27 13:55:26,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,165 INFO L229 MonitoredProcess]: Starting monitored process 46 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 13:55:26,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-08-27 13:55:26,167 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:26,167 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:26,173 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:26,174 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:26,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:26,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,190 INFO L229 MonitoredProcess]: Starting monitored process 47 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 13:55:26,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-08-27 13:55:26,192 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:26,192 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:26,198 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:26,198 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:26,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:26,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,221 INFO L229 MonitoredProcess]: Starting monitored process 48 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 13:55:26,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-08-27 13:55:26,223 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:26,224 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:26,230 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:55:26,230 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:55:26,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:26,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,248 INFO L229 MonitoredProcess]: Starting monitored process 49 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 13:55:26,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-08-27 13:55:26,250 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:55:26,250 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:26,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:26,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,273 INFO L229 MonitoredProcess]: Starting monitored process 50 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 13:55:26,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-08-27 13:55:26,276 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:55:26,276 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:55:26,300 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:55:26,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:26,303 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:55:26,303 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:55:26,303 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:55:26,303 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:55:26,303 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:55:26,303 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,303 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:55:26,303 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:55:26,303 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d.c_Iteration7_Loop [2021-08-27 13:55:26,304 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:55:26,304 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:55:26,304 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 13:55:26,307 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 13:55:26,308 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 13:55:26,311 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 13:55:26,312 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 13:55:26,331 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 13:55:26,356 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:55:26,356 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:55:26,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,363 INFO L229 MonitoredProcess]: Starting monitored process 51 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 13:55:26,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-08-27 13:55:26,365 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 13:55:26,371 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:26,371 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:26,371 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:26,371 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:26,371 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:26,372 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:26,372 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:26,373 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:26,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Ended with exit code 0 [2021-08-27 13:55:26,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,389 INFO L229 MonitoredProcess]: Starting monitored process 52 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 13:55:26,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-08-27 13:55:26,391 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 13:55:26,396 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:26,397 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:26,397 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:26,397 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:26,397 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:26,397 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:26,397 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:26,398 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:26,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Ended with exit code 0 [2021-08-27 13:55:26,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,414 INFO L229 MonitoredProcess]: Starting monitored process 53 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 13:55:26,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-08-27 13:55:26,416 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 13:55:26,423 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:26,423 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:26,423 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:26,423 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:26,423 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:26,424 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:26,424 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:26,438 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:26,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:26,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,460 INFO L229 MonitoredProcess]: Starting monitored process 54 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 13:55:26,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-08-27 13:55:26,463 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 13:55:26,469 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:26,469 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:26,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:26,470 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:26,470 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:26,470 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:26,470 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:26,484 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:55:26,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:26,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,507 INFO L229 MonitoredProcess]: Starting monitored process 55 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 13:55:26,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-08-27 13:55:26,510 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 13:55:26,516 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:55:26,516 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:55:26,516 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:55:26,516 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:55:26,516 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:55:26,517 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:55:26,517 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:55:26,528 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:55:26,530 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 13:55:26,530 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:55:26,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:55:26,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:55:26,531 INFO L229 MonitoredProcess]: Starting monitored process 56 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 13:55:26,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-08-27 13:55:26,532 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:55:26,532 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:55:26,532 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:55:26,533 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2021-08-27 13:55:26,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:26,548 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:55:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:26,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 13:55:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:26,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:27,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:27,090 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 13:55:27,090 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-08-27 13:55:27,091 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:27,147 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 63 states and 75 transitions. Complement of second has 13 states. [2021-08-27 13:55:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2021-08-27 13:55:27,148 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2021-08-27 13:55:27,148 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:27,148 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:55:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 13:55:27,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:27,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:27,637 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 13:55:27,638 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2021-08-27 13:55:27,638 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:27,693 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 63 states and 75 transitions. Complement of second has 13 states. [2021-08-27 13:55:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2021-08-27 13:55:27,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2021-08-27 13:55:27,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:27,695 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:55:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:55:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:27,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-27 13:55:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:55:28,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 13:55:28,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:55:28,188 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 13:55:28,188 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2021-08-27 13:55:28,188 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:28,258 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Result 77 states and 89 transitions. Complement of second has 13 states. [2021-08-27 13:55:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:55:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 13:55:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2021-08-27 13:55:28,259 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2021-08-27 13:55:28,259 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:28,259 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2021-08-27 13:55:28,260 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:28,260 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2021-08-27 13:55:28,260 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:55:28,260 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 89 transitions. [2021-08-27 13:55:28,261 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:55:28,261 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 0 states and 0 transitions. [2021-08-27 13:55:28,261 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 13:55:28,261 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 13:55:28,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 13:55:28,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 13:55:28,262 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:55:28,262 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:55:28,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 13:55:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 13:55:28,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 13:55:28,263 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 13:55:28,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 13:55:28,263 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-08-27 13:55:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-27 13:55:28,263 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-08-27 13:55:28,263 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:55:28,263 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 13:55:28,263 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 13:55:28,264 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 13:55:28,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 13:55:28,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 13:55:28,264 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:55:28,264 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:55:28,264 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:55:28,264 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-08-27 13:55:28,264 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 13:55:28,264 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:55:28,264 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 13:55:28,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 01:55:28 BoogieIcfgContainer [2021-08-27 13:55:28,270 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 13:55:28,270 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 13:55:28,270 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 13:55:28,270 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 13:55:28,271 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:55:18" (3/4) ... [2021-08-27 13:55:28,273 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 13:55:28,273 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 13:55:28,274 INFO L168 Benchmark]: Toolchain (without parser) took 10702.74 ms. Allocated memory was 56.6 MB in the beginning and 157.3 MB in the end (delta: 100.7 MB). Free memory was 36.0 MB in the beginning and 75.7 MB in the end (delta: -39.6 MB). Peak memory consumption was 61.2 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:28,274 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 56.6 MB. Free memory was 39.6 MB in the beginning and 39.5 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:55:28,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.51 ms. Allocated memory is still 56.6 MB. Free memory was 35.9 MB in the beginning and 27.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:28,275 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.44 ms. Allocated memory is still 56.6 MB. Free memory was 27.3 MB in the beginning and 40.9 MB in the end (delta: -13.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:28,275 INFO L168 Benchmark]: Boogie Preprocessor took 13.84 ms. Allocated memory is still 56.6 MB. Free memory was 40.9 MB in the beginning and 40.1 MB in the end (delta: 766.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:55:28,276 INFO L168 Benchmark]: RCFGBuilder took 272.19 ms. Allocated memory is still 56.6 MB. Free memory was 39.9 MB in the beginning and 30.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:28,276 INFO L168 Benchmark]: BuchiAutomizer took 10211.34 ms. Allocated memory was 56.6 MB in the beginning and 157.3 MB in the end (delta: 100.7 MB). Free memory was 30.1 MB in the beginning and 75.7 MB in the end (delta: -45.5 MB). Peak memory consumption was 58.3 MB. Max. memory is 16.1 GB. [2021-08-27 13:55:28,276 INFO L168 Benchmark]: Witness Printer took 2.96 ms. Allocated memory is still 157.3 MB. Free memory is still 75.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:55:28,278 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 56.6 MB. Free memory was 39.6 MB in the beginning and 39.5 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 146.51 ms. Allocated memory is still 56.6 MB. Free memory was 35.9 MB in the beginning and 27.3 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 49.44 ms. Allocated memory is still 56.6 MB. Free memory was 27.3 MB in the beginning and 40.9 MB in the end (delta: -13.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.84 ms. Allocated memory is still 56.6 MB. Free memory was 40.9 MB in the beginning and 40.1 MB in the end (delta: 766.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 272.19 ms. Allocated memory is still 56.6 MB. Free memory was 39.9 MB in the beginning and 30.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 10211.34 ms. Allocated memory was 56.6 MB in the beginning and 157.3 MB in the end (delta: 100.7 MB). Free memory was 30.1 MB in the beginning and 75.7 MB in the end (delta: -45.5 MB). Peak memory consumption was 58.3 MB. Max. memory is 16.1 GB. * Witness Printer took 2.96 ms. Allocated memory is still 157.3 MB. Free memory is still 75.7 MB. There was no memory consumed. 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 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.1s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 4.8s. Construction of modules took 0.3s. Büchi inclusion checks took 4.7s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 78.0ms AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 111 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 188 SDtfs, 184 SDslu, 311 SDs, 0 SdLazy, 314 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 361.1ms Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf96 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq149 hnf94 smp100 dnf100 smp100 tf112 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 37ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 13:55:28,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:28,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-27 13:55:28,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-27 13:55:28,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...